├── .swiftpm └── xcode │ └── xcshareddata │ └── xcschemes │ └── AnimatedTabBar.xcscheme ├── AnimatedTabBarExample ├── AnimatedTabBarExample.xcodeproj │ ├── project.pbxproj │ ├── project.xcworkspace │ │ └── xcshareddata │ │ │ └── IDEWorkspaceChecks.plist │ └── xcshareddata │ │ └── xcschemes │ │ └── Example.xcscheme └── AnimatedTabBarExample │ ├── Assets.xcassets │ ├── AccentColor.colorset │ │ └── Contents.json │ ├── AppIcon.appiconset │ │ └── Contents.json │ ├── Contents.json │ ├── colorTab1.imageset │ │ ├── Contents.json │ │ └── colorTab1.pdf │ ├── colorTab1Bg.imageset │ │ ├── Contents.json │ │ └── colorTab1Bg.pdf │ ├── colorTab2.imageset │ │ ├── Contents.json │ │ └── colorTab2.pdf │ ├── colorTab2Bg.imageset │ │ ├── Contents.json │ │ └── colorTab2Bg.pdf │ ├── colorTab3.imageset │ │ ├── Contents.json │ │ └── colorTab3.pdf │ ├── colorTab3Bg.imageset │ │ ├── Contents.json │ │ └── colorTab3Bg.pdf │ ├── colorTab3Plus.imageset │ │ ├── Contents.json │ │ └── colorTab3Plus.pdf │ ├── colorTab4.imageset │ │ ├── Contents.json │ │ └── colorTab4.pdf │ ├── colorTab4Bg.imageset │ │ ├── Contents.json │ │ └── colorTab4Bg.pdf │ ├── colorTab5.imageset │ │ ├── Contents.json │ │ └── colorTab5.pdf │ ├── colorTab5Bg.imageset │ │ ├── Contents.json │ │ └── colorTab5Bg.pdf │ ├── tab1.imageset │ │ ├── Contents.json │ │ └── Icon.pdf │ ├── tab2.imageset │ │ ├── Contents.json │ │ └── Icon (1).pdf │ ├── tab3.imageset │ │ ├── Contents.json │ │ └── message_24.pdf │ ├── tab4.imageset │ │ ├── Contents.json │ │ └── Icon (2).pdf │ └── tab5.imageset │ │ ├── Contents.json │ │ └── Icon (3).pdf │ ├── ContentView.swift │ ├── ExampleApp.swift │ ├── ExampleColorButtons.swift │ ├── Info.plist │ ├── KeyframeWiggleButton.swift │ └── Utils.swift ├── LICENSE ├── Package.swift ├── README.md └── Sources ├── AnimatedTabBar.h └── AnimatedTabBar ├── AnimatedTabbar.swift ├── BezierPathLength.swift ├── ButtonsBarLayout.swift ├── GeometryEffects.swift ├── IndentableRect.swift ├── TabBarButtons ├── 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Created by Alisa Mylnikova on 23.01.2023. 6 | // 7 | 8 | import SwiftUI 9 | import AnimatedTabBar 10 | 11 | struct CircleValues { 12 | var scale = 1.0 13 | var offset = 1.3 14 | } 15 | 16 | struct ContentView: View { 17 | 18 | @State private var selectedIndex = 1 19 | @State private var prevSelectedIndex = 1 20 | 21 | let names = ["heart", "leaf", "drop", "circle", "book"] 22 | 23 | // a hack for keyframe animation 24 | @State var time = 0.0 25 | let timer = Timer.publish(every: 0.1, on: .main, in: .common).autoconnect() 26 | 27 | var body: some View { 28 | #if swift(>=5.9) 29 | if #available(iOS 17.0, *) { 30 | tabbars() 31 | // a hack for keyframe animation 32 | .onReceive(timer) { input in 33 | time = Date().timeIntervalSince1970 34 | } 35 | } else { 36 | tabbars() 37 | } 38 | #else 39 | tabbars() 40 | #endif 41 | } 42 | 43 | func tabbars() -> some View { 44 | ZStack(alignment: .bottom) { 45 | Color.examplePurple.edgesIgnoringSafeArea(.all) 46 | 47 | VStack(spacing: 50) { 48 | AnimatedTabBar(selectedIndex: $selectedIndex, prevSelectedIndex: $prevSelectedIndex) { 49 | colorButtonAt(0, type: .bell) 50 | colorButtonAt(1, type: .bell) 51 | colorButtonAt(2, type: .plus) 52 | colorButtonAt(3, type: .calendar) 53 | colorButtonAt(4, type: .gear) 54 | } 55 | .cornerRadius(16) 56 | .selectedColor(.exampleGrey) 57 | .unselectedColor(.exampleLightGrey) 58 | .ballColor(.white) 59 | .verticalPadding(20) 60 | .ballTrajectory(.straight) 61 | .ballAnimation(.interpolatingSpring(stiffness: 130, damping: 15)) 62 | .indentAnimation(.easeOut(duration: 0.3)) 63 | 64 | AnimatedTabBar(selectedIndex: $selectedIndex, 65 | views: (0..<5).map { dropletButtonAt($0) }) 66 | .cornerRadius(16) 67 | .selectedColor(.exampleGrey.opacity(0.3)) 68 | .unselectedColor(.exampleGrey.opacity(0.3)) 69 | .ballColor(.white) 70 | .verticalPadding(15) 71 | 72 | AnimatedTabBar(selectedIndex: $selectedIndex, 73 | views: (0..=5.9) 82 | if #available(iOS 17.0, *) { 83 | AnimatedTabBar(selectedIndex: $selectedIndex, 84 | views: (0.. some View { 100 | ColorButton( 101 | image: Image("colorTab\(index+1)"), 102 | colorImage: Image("colorTab\(index+1)Bg"), 103 | isSelected: selectedIndex == index, 104 | fromLeft: prevSelectedIndex < index, 105 | toLeft: selectedIndex < index, 106 | animationType: type) 107 | } 108 | 109 | func dropletButtonAt(_ index: Int) -> some View { 110 | DropletButton(imageName: "tab\(index+1)", dropletColor: .examplePurple, isSelected: selectedIndex == index) 111 | } 112 | 113 | func wiggleButtonAt(_ index: Int, name: String) -> some View { 114 | WiggleButton(image: Image(systemName: name), maskImage: Image(systemName: "\(name).fill"), isSelected: index == selectedIndex) 115 | .scaleEffect(1.2) 116 | } 117 | 118 | #if swift(>=5.9) 119 | @available(iOS 17.0, *) 120 | func keyframeWiggleButtonAt(_ index: Int, name: String) -> some View { 121 | KeyframeWiggleButton(image: Image(systemName: name), maskImage: Image(systemName: "\(name).fill"), isSelected: index == selectedIndex) 122 | .scaleEffect(1.2) 123 | } 124 | #endif 125 | } 126 | -------------------------------------------------------------------------------- /AnimatedTabBarExample/AnimatedTabBarExample/ExampleApp.swift: -------------------------------------------------------------------------------- 1 | // 2 | // ExampleApp.swift 3 | // Example 4 | // 5 | // Created by Alisa Mylnikova on 23.01.2023. 6 | // 7 | 8 | import SwiftUI 9 | 10 | @main 11 | struct ExampleApp: App { 12 | var body: some Scene { 13 | WindowGroup { 14 | ContentView() 15 | } 16 | } 17 | } 18 | 19 | -------------------------------------------------------------------------------- /AnimatedTabBarExample/AnimatedTabBarExample/ExampleColorButtons.swift: -------------------------------------------------------------------------------- 1 | // 2 | // ExampleButtons.swift 3 | // 4 | // 5 | // Created by Alisa Mylnikova on 27.01.2023. 6 | // 7 | 8 | import SwiftUI 9 | 10 | public struct ColorButton: View { 11 | 12 | public enum AnimationType { 13 | case bell 14 | case plus 15 | case calendar 16 | case gear 17 | } 18 | 19 | public var image: Image 20 | public var colorImage: Image 21 | public var isSelected: Bool 22 | public var fromLeft: Bool 23 | public var toLeft: Bool 24 | public var animationType: AnimationType 25 | 26 | @State var t: CGFloat = 0 27 | @State var tForBg: CGFloat = 0 28 | 29 | var scale: CGFloat { 30 | 1 + t * 0.2 31 | } 32 | 33 | public var body: some View { 34 | ZStack { 35 | ColorButtonBg(colorImage: colorImage, isSelected: isSelected, fromLeft: fromLeft, toLeft: toLeft, t: tForBg) 36 | .offset(x: 3, y: 3) 37 | switch animationType { 38 | case .bell: 39 | ColorButtonOutlineBell(image: image, t: t) 40 | case .plus: 41 | ColorButtonOutlinePlus(image: image, t: t) 42 | case .calendar: 43 | ColorButtonOutlineCalendar(image: image, fromLeft: fromLeft, t: t) 44 | case .gear: 45 | ColorButtonOutlineGear(image: image, t: t) 46 | } 47 | } 48 | .padding(8) 49 | .onAppear { 50 | if isSelected { 51 | tForBg = 1 52 | } 53 | } 54 | .onChange(of: isSelected) { newValue in 55 | if newValue { 56 | withAnimation(.interpolatingSpring(stiffness: 300, damping: 10).delay(0.15)) { 57 | t = 1 58 | } 59 | withAnimation(.easeIn(duration: 0.3)) { 60 | tForBg = 1 61 | } 62 | } else { 63 | t = 0 64 | withAnimation(.easeIn(duration: 0.3)) { 65 | tForBg = 0 66 | } 67 | } 68 | } 69 | } 70 | } 71 | 72 | struct ColorButtonOutlineBell: View, Animatable { 73 | 74 | var image: Image 75 | var t: CGFloat 76 | 77 | nonisolated var animatableData: CGFloat { 78 | get { t } 79 | set { t = newValue } 80 | } 81 | 82 | var angle: CGFloat { 83 | if t < 0.5 { 84 | return 2*t * 20 85 | } 86 | return 2*(1 - t) * 20 87 | } 88 | 89 | var body: some View { 90 | image 91 | .rotationEffect(Angle(degrees: angle), anchor: UnitPoint(x: 0.5, y: 0)) 92 | } 93 | } 94 | 95 | struct ColorButtonOutlinePlus: View { 96 | 97 | var image: Image 98 | var t: CGFloat 99 | 100 | var body: some View { 101 | ZStack { 102 | image 103 | Image("colorTab3Plus") 104 | .rotationEffect(Angle(degrees: t * 90)) 105 | } 106 | } 107 | } 108 | 109 | struct ColorButtonOutlineCalendar: View, Animatable { 110 | 111 | var image: Image 112 | var fromLeft: Bool 113 | var t: CGFloat 114 | 115 | nonisolated var animatableData: CGFloat { 116 | get { t } 117 | set { t = newValue } 118 | } 119 | 120 | var body: some View { 121 | ZStack { 122 | image 123 | .offset(x: offset(maxValue: 5)) 124 | Circle() 125 | .frame(width: 3) 126 | .offset(x: 3, y: 4) 127 | .offset(x: offset(maxValue: 8)) 128 | } 129 | } 130 | 131 | func offset(maxValue: CGFloat) -> CGFloat { 132 | let max = fromLeft ? maxValue : -maxValue 133 | if t < 0.5 { 134 | return 2*t * max 135 | } 136 | return 2*(1 - t) * max 137 | } 138 | } 139 | 140 | struct ColorButtonOutlineGear: View { 141 | 142 | var image: Image 143 | var t: CGFloat 144 | 145 | var body: some View { 146 | image 147 | .rotationEffect(Angle(degrees: t * 50)) 148 | } 149 | } 150 | 151 | struct ColorButtonBg: View { 152 | 153 | var colorImage: Image 154 | var isSelected: Bool 155 | var fromLeft: Bool 156 | var toLeft: Bool 157 | var t: CGFloat 158 | 159 | var offset: CGFloat { 160 | if isSelected { 161 | return fromLeft ? (t - 1) * 20 : (t - 1) * -15 162 | } else { 163 | return toLeft ? (t - 1) * 20 : (t - 1) * -15 164 | } 165 | } 166 | 167 | var body: some View { 168 | colorImage 169 | .scaleEffect(t) 170 | .offset(x: offset) 171 | } 172 | } 173 | 174 | -------------------------------------------------------------------------------- /AnimatedTabBarExample/AnimatedTabBarExample/Info.plist: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | UIViewControllerBasedStatusBarAppearance 6 | 7 | 8 | 9 | -------------------------------------------------------------------------------- /AnimatedTabBarExample/AnimatedTabBarExample/KeyframeWiggleButton.swift: -------------------------------------------------------------------------------- 1 | // 2 | // File.swift 3 | // 4 | // 5 | // Created by Alisa Mylnikova on 14.06.2023. 6 | // 7 | 8 | import SwiftUI 9 | 10 | struct AnimationValues { 11 | var growingScale = 1.0 12 | var shrinkingScale = 1.3 13 | var bgWiggle = 0.0 14 | } 15 | 16 | #if swift(>=5.9) 17 | @available(iOS 17.0, *) 18 | public struct KeyframeWiggleButton: View { 19 | 20 | public var image: Image 21 | public var maskImage: Image 22 | public var isSelected: Bool 23 | 24 | @State private var isGrowing = true 25 | 26 | public var body: some View { 27 | image 28 | .keyframeAnimator(initialValue: AnimationValues(), trigger: isSelected) { [isGrowing] content, value in 29 | ZStack { 30 | KeyframeWiggleButtonBg(t: isGrowing ? value.bgWiggle : 0) 31 | .opacity(0.4) 32 | .mask(maskImage) 33 | content 34 | } 35 | .scaleEffect(isGrowing ? value.growingScale : value.shrinkingScale) 36 | } keyframes: { _ in 37 | KeyframeTrack(\.growingScale) { 38 | CubicKeyframe(1.3, duration: 0.1) 39 | CubicKeyframe(1.4, duration: 0.1) 40 | CubicKeyframe(1.3, duration: 0.1) 41 | } 42 | 43 | KeyframeTrack(\.bgWiggle) { 44 | SpringKeyframe(0.0, duration: 0.05) 45 | SpringKeyframe(3.0, duration: 0.1) 46 | SpringKeyframe(1.0, duration: 0.1) 47 | SpringKeyframe(2.0, duration: 0.1) 48 | SpringKeyframe(0.0, duration: 0.1) 49 | } 50 | 51 | KeyframeTrack(\.shrinkingScale) { 52 | SpringKeyframe(0.9, duration: 0.2) 53 | } 54 | } 55 | .onChange(of: isSelected) { oldValue, newValue in 56 | isGrowing = newValue 57 | } 58 | .onAppear { 59 | isGrowing = !isSelected 60 | } 61 | } 62 | } 63 | 64 | struct KeyframeWiggleButtonBg: Shape { 65 | 66 | var t: CGFloat 67 | 68 | func path(in rect: CGRect) -> Path { 69 | var path = Path() 70 | path.addArc(center: CGPoint(x: rect.midX, y: rect.maxY), radius: 10 + t, startAngle: Angle(radians: 0), endAngle: Angle(radians: .pi), clockwise: true) 71 | return path 72 | } 73 | } 74 | 75 | 76 | #endif 77 | -------------------------------------------------------------------------------- /AnimatedTabBarExample/AnimatedTabBarExample/Utils.swift: -------------------------------------------------------------------------------- 1 | // 2 | // Utils.swift 3 | // Example 4 | // 5 | // Created by Alisa Mylnikova on 23.01.2023. 6 | // 7 | 8 | import SwiftUI 9 | 10 | extension Color { 11 | init(hex: String) { 12 | let scanner = Scanner(string: hex) 13 | var rgbValue: UInt64 = 0 14 | scanner.scanHexInt64(&rgbValue) 15 | 16 | let r = (rgbValue & 0xff0000) >> 16 17 | let g = (rgbValue & 0xff00) >> 8 18 | let b = rgbValue & 0xff 19 | 20 | self.init(red: Double(r) / 0xff, green: Double(g) / 0xff, blue: Double(b) / 0xff) 21 | } 22 | 23 | static let exampleGrey = Color(hex: "0C0C0C") 24 | static let exampleLightGrey = Color(hex: "B1B1B1") 25 | static let examplePurple = Color(hex: "7D26FE") 26 | } 27 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | Copyright (c) 2019 exyte 2 | 3 | Permission is hereby granted, free of charge, to any person obtaining a copy 4 | of this software and associated documentation files (the "Software"), to deal 5 | in the Software without restriction, including without limitation the rights 6 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 7 | copies of the Software, and to permit persons to whom the Software is 8 | furnished to do so, subject to the following conditions: 9 | 10 | The above copyright notice and this permission notice shall be included in 11 | all copies or substantial portions of the Software. 12 | 13 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 14 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 15 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 16 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 17 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 18 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 19 | THE SOFTWARE. 20 | -------------------------------------------------------------------------------- /Package.swift: -------------------------------------------------------------------------------- 1 | // swift-tools-version: 5.9 2 | 3 | import PackageDescription 4 | 5 | let package = Package( 6 | name: "AnimatedTabBar", 7 | platforms: [ 8 | .iOS(.v16), 9 | ], 10 | products: [ 11 | .library( 12 | name: "AnimatedTabBar", 13 | targets: ["AnimatedTabBar"]), 14 | ], 15 | dependencies: [], 16 | targets: [ 17 | .target( 18 | name: "AnimatedTabBar", 19 | dependencies: [], 20 | swiftSettings: [ 21 | .enableExperimentalFeature("StrictConcurrency") 22 | ] 23 | ), 24 | ] 25 | ) 26 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 |

2 | 3 |

5 | 6 | ![demo](https://user-images.githubusercontent.com/9447630/217482148-8594b3ce-e6be-4e84-a65d-29915566a61a.gif) 7 | 8 |

Animated Tab Bar

9 | 10 |

AnimatedTabBar is a tabbar with a number of preset animations written in pure SwiftUI

11 | 12 | Read Article » 13 | 14 | ![](https://img.shields.io/github/v/tag/exyte/AnimatedTabBar?label=Version) 15 | [![](https://img.shields.io/endpoint?url=https%3A%2F%2Fswiftpackageindex.com%2Fapi%2Fpackages%2Fexyte%2FAnimatedTabBar%2Fbadge%3Ftype%3Dswift-versions)](https://swiftpackageindex.com/exyte/AnimatedTabBar) 16 | [![](https://img.shields.io/endpoint?url=https%3A%2F%2Fswiftpackageindex.com%2Fapi%2Fpackages%2Fexyte%2FAnimatedTabBar%2Fbadge%3Ftype%3Dplatforms)](https://swiftpackageindex.com/exyte/AnimatedTabBar) 17 | [![SPM](https://img.shields.io/badge/SPM-Compatible-brightgreen.svg)](https://swiftpackageindex.com/exyte/AnimatedTabBar) 18 | [![Cocoapods](https://img.shields.io/badge/Cocoapods-Deprecated%20after%200.1.4-yellow.svg)](https://cocoapods.org/pods/ExyteAnimatedTabBar) 19 | [![License: MIT](https://img.shields.io/badge/License-MIT-black.svg)](https://opensource.org/licenses/MIT) 20 | 21 | # Usage 22 | 1. Add an `Int` to store the current selection 23 | 2. Pass your buttons to the AnimatedTabBar using one of 2 initializers. For the first one you can pass any view type: 24 | ```swift 25 | import AnimatedTabBar 26 | 27 | AnimatedTabBar(selectedIndex: $selectedIndex) { 28 | TabButton1() 29 | TabButton2() 30 | TabButton3() 31 | } 32 | ``` 33 | 34 | For the second one the views must have the same type, or be manually converted to `AnyView` 35 | ```swift 36 | AnimatedTabBar(selectedIndex: $selectedIndex, views: [TabButton1(), TabButton2(), TabButton3()]) 37 | ``` 38 | 39 | ### Required parameters 40 | `selectedIndex` - binding to the current index 41 | `views` - buttons to display in the tabbar 42 | 43 | ### Available customizations - modifiers 44 | use the `customize` closure in the popup modifier: 45 | 46 | `barColor` - Color of the tabbar itself 47 | `selectedColor` - Selected tab color (use template rendering for this color to be applied properly) 48 | `unselectedColor` - Unselected tab color 49 | `ballColor` - Ball indicator color 50 | `verticalPadding` - Space from the buttons to the bar's top and bottom edges 51 | `cornerRadius` - The corner radius applied to the tabbar background color 52 | `ballAnimation` - Animation curve to apply to ball motion, default is .easeOut(duration: 0.6) 53 | `indentAnimation` - Animation curve for growing/shrinking of the indent in the tabbar 54 | `buttonsAnimation` - Animation curve for applying color to tab buttons 55 | `didSelectIndex` - Closure which gets called on every tab tap 56 | 57 | `ballTrajectory` - Options for ball indicator animation paths: 58 | - `parabolic` - Jump to the selected button following a parabolic arc 59 | - `teleport` - Disappear and quickly re-appear above selected tab 60 | - `straight` - Slide to the selected tab 61 | 62 | ### Built-in animatable tab buttons 63 | By default tabs only have a simple color animation, but you can customize that. This library has two built-in button types you can use out-of-the-box: `DropletButton` and `WiggleButton`, and a super custom `ColorButton` type in the Example project. Please feel free to use them in your projects or build your own buttons on top of them. 64 | 65 | ## Examples 66 | 67 | To try the AnimatedTabBar examples: 68 | - Clone the repo `https://github.com/exyte/AnimatedTabBar.git` 69 | - Open `AnimatedTabBarExample.xcodeproj` in the Xcode 70 | - Try it! 71 | 72 | ## Installation 73 | 74 | ### [Swift Package Manager](https://swift.org/package-manager/) 75 | 76 | ```swift 77 | dependencies: [ 78 | .package(url: "https://github.com/exyte/AnimatedTabBar.git") 79 | ] 80 | ``` 81 | 82 | ## Requirements 83 | 84 | * iOS 16+ 85 | * Xcode 14+ 86 | 87 | ## Acknowledgements 88 | 89 | Many thanks to [Yeasin Arafat](https://dribbble.com/shots/14883627-Tab-Bar-Animation) for their beautiful original work that we recreated with SwiftUI. 90 | 91 | ## Our other open source SwiftUI libraries 92 | [PopupView](https://github.com/exyte/PopupView) - Toasts and popups library 93 | [AnchoredPopup](https://github.com/exyte/AnchoredPopup) - Anchored Popup grows "out" of a trigger view (similar to Hero animation) 94 | [Grid](https://github.com/exyte/Grid) - The most powerful Grid container 95 | [ScalingHeaderScrollView](https://github.com/exyte/ScalingHeaderScrollView) - A scroll view with a sticky header which shrinks as you scroll 96 | [MediaPicker](https://github.com/exyte/mediapicker) - Customizable media picker 97 | [Chat](https://github.com/exyte/chat) - Chat UI framework with fully customizable message cells, input view, and a built-in media picker 98 | [OpenAI](https://github.com/exyte/OpenAI) Wrapper lib for [OpenAI REST API](https://platform.openai.com/docs/api-reference/introduction) 99 | [AnimatedGradient](https://github.com/exyte/AnimatedGradient) - Animated linear gradient 100 | [ConcentricOnboarding](https://github.com/exyte/ConcentricOnboarding) - Animated onboarding flow 101 | [FloatingButton](https://github.com/exyte/FloatingButton) - Floating button menu 102 | [ActivityIndicatorView](https://github.com/exyte/ActivityIndicatorView) - A number of animated loading indicators 103 | [ProgressIndicatorView](https://github.com/exyte/ProgressIndicatorView) - A number of animated progress indicators 104 | [FlagAndCountryCode](https://github.com/exyte/FlagAndCountryCode) - Phone codes and flags for every country 105 | [SVGView](https://github.com/exyte/SVGView) - SVG parser 106 | [LiquidSwipe](https://github.com/exyte/LiquidSwipe) - Liquid navigation animation 107 | -------------------------------------------------------------------------------- /Sources/AnimatedTabBar.h: -------------------------------------------------------------------------------- 1 | // 2 | // AnimatedTabBar.h 3 | // AnimatedTabBar 4 | // 5 | // Created by Alisa Mylnikova on 23.01.2023. 6 | // 7 | 8 | #import 9 | 10 | //! Project version number for AnimatedTabBar. 11 | FOUNDATION_EXPORT double AnimatedTabBarVersionNumber; 12 | 13 | //! Project version string for AnimatedTabBar. 14 | FOUNDATION_EXPORT const unsigned char AnimatedTabBarVersionString[]; 15 | 16 | // In this header, you should import all the public headers of your framework using statements like #import 17 | 18 | 19 | -------------------------------------------------------------------------------- /Sources/AnimatedTabBar/AnimatedTabbar.swift: -------------------------------------------------------------------------------- 1 | // 2 | // ContentView.swift 3 | // asd 4 | // 5 | // Created by Alisa Mylnikova on 05/10/2020. 6 | // 7 | 8 | import SwiftUI 9 | 10 | public struct AnimatedTabBar: View { 11 | 12 | public enum BallTrajectory { 13 | case parabolic 14 | case teleport 15 | case straight 16 | } 17 | 18 | @Binding private var selectedIndex: Int 19 | @Binding private var prevSelectedIndex: Int 20 | private var views: [AnyView] = [] 21 | 22 | public init(selectedIndex: Binding, 23 | prevSelectedIndex: Binding? = nil, 24 | @ViewBuilder content: @escaping () -> TupleView) { 25 | self._selectedIndex = selectedIndex 26 | self._prevSelectedIndex = prevSelectedIndex ?? .constant(0) 27 | self.internalPrevSelectedIndex = selectedIndex.wrappedValue 28 | self.views = content().getViews 29 | } 30 | 31 | public init(selectedIndex: Binding, 32 | prevSelectedIndex: Binding? = nil, 33 | views: [Content]) { 34 | self._selectedIndex = selectedIndex 35 | self._prevSelectedIndex = prevSelectedIndex ?? .constant(0) 36 | self.internalPrevSelectedIndex = selectedIndex.wrappedValue 37 | self.views = views.map { AnyView($0) } 38 | } 39 | 40 | // MARK: - Customization 41 | 42 | private var barColor: Color = .white 43 | private var selectedColor: Color = .red 44 | private var unselectedColor: Color = .black 45 | private var ballColor: Color = .red 46 | 47 | private var verticalPadding: CGFloat = 30 48 | private var cornerRadius: CGFloat = 0 49 | 50 | private var ballAnimation: Animation = .easeOut(duration: 0.6) 51 | private var indentAnimation: Animation = .easeOut(duration: 0.6) 52 | private var buttonsAnimation: Animation = .easeOut(duration: 0.6) 53 | private var ballTrajectory: BallTrajectory = .parabolic 54 | 55 | private var didSelectIndex: ((Int)->())? = nil 56 | 57 | // MARK: - Properties 58 | 59 | @State private var frames: [CGRect] = [] 60 | @State private var tBall: CGFloat = 0 61 | @State private var tIndent: CGFloat = 0 62 | @State private var internalPrevSelectedIndex: Int = 0 63 | 64 | private let circleSize = 10.0 65 | 66 | @Environment(\.layoutDirection) private var layoutDirection 67 | 68 | public var body: some View { 69 | VStack { 70 | HStack(alignment: .bottom) { 71 | if layoutDirection == .rightToLeft { 72 | Spacer() 73 | circle 74 | .scaleEffect(x: layoutDirection == .rightToLeft ? -1 : 1, y: 1) 75 | } else { 76 | circle 77 | Spacer() 78 | } 79 | } 80 | 81 | ZStack { 82 | background 83 | .cornerRadius(cornerRadius) 84 | 85 | ButtonsBar { 86 | ForEach(0..=5.9) 95 | if #available(iOS 17.0, *) { 96 | view.animation(.linear) { 97 | $0.foregroundStyle(selectedIndex == i ? selectedColor : unselectedColor) 98 | } 99 | } else { 100 | view 101 | .foregroundStyle(selectedIndex == i ? selectedColor : unselectedColor) 102 | .animation(buttonsAnimation, value: selectedIndex) 103 | } 104 | #else 105 | view 106 | .foregroundStyle(selectedIndex == i ? selectedColor : unselectedColor) 107 | .animation(buttonsAnimation, value: selectedIndex) 108 | #endif 109 | } 110 | } 111 | .coordinateSpace(name: buttonsBarSpace) 112 | .onPreferenceChange(ButtonPreferenceKey.self) { frames in 113 | DispatchQueue.main.async { 114 | self.frames = frames 115 | } 116 | } 117 | .padding(.vertical, verticalPadding) 118 | } 119 | .fixedSize(horizontal: false, vertical: true) 120 | } 121 | .onChange(of: selectedIndex) { [selectedIndex] newValue in 122 | internalPrevSelectedIndex = selectedIndex 123 | tBall = 0 124 | tIndent = 0 125 | DispatchQueue.main.async { 126 | withAnimation(ballAnimation) { 127 | tBall = 1 128 | } 129 | withAnimation(indentAnimation) { 130 | tIndent = 1 131 | } 132 | } 133 | } 134 | } 135 | 136 | @ViewBuilder 137 | var circle: some View { 138 | switch ballTrajectory { 139 | case .parabolic: 140 | Circle() 141 | .frame(width: circleSize, height: circleSize) 142 | .foregroundColor(ballColor) 143 | .fixedSize() 144 | .alongPath( 145 | t: tBall, 146 | trajectory: trajectory( 147 | from: getBallCoord(internalPrevSelectedIndex), 148 | to: getBallCoord(selectedIndex) 149 | ) 150 | ) 151 | 152 | case .teleport: 153 | Circle() 154 | .frame(width: circleSize, height: circleSize) 155 | .foregroundColor(ballColor) 156 | .fixedSize() 157 | .teleportEffect(t: tBall, from: getBallCoord(internalPrevSelectedIndex).x, to: getBallCoord(selectedIndex).x) 158 | .offset(y: 15) 159 | 160 | case .straight: 161 | Circle() 162 | .frame(width: circleSize, height: circleSize) 163 | .foregroundColor(ballColor) 164 | .fixedSize() 165 | .offset(x: getBallCoord(selectedIndex).x, y: 15) 166 | .animation(ballAnimation, value: selectedIndex) 167 | } 168 | } 169 | 170 | @ViewBuilder 171 | var background: some View { 172 | if let _ = frames[safe: selectedIndex] { 173 | switch ballTrajectory { 174 | case .parabolic, .teleport: 175 | HStack(spacing: 0) { 176 | ForEach(0.. CGPoint { 191 | guard let frame = frames[safe: at] else { 192 | return .zero 193 | } 194 | return CGPoint(x: frame.midX - circleSize/2, y: frame.minY + 15) 195 | } 196 | 197 | func getCoord(_ at: Int) -> CGPoint { 198 | guard let frame = frames[safe: at] else { 199 | return .zero 200 | } 201 | return CGPoint(x: frame.midX, y: frame.minY) 202 | } 203 | 204 | func trajectory(from: CGPoint?, to: CGPoint?) -> Path { 205 | var path = Path() 206 | guard let from = from, let to = to else { 207 | return path 208 | } 209 | path.move(to: from) 210 | path.addQuadCurve(to: to, control: CGPoint(x: (from.x + to.x)/2, y: from.y - 100)) 211 | return path 212 | } 213 | 214 | // MARK: - Customization setters 215 | 216 | public func barColor(_ color: Color) -> AnimatedTabBar { 217 | var switcher = self 218 | switcher.barColor = color 219 | return switcher 220 | } 221 | 222 | public func selectedColor(_ color: Color) -> AnimatedTabBar { 223 | var switcher = self 224 | switcher.selectedColor = color 225 | return switcher 226 | } 227 | 228 | public func unselectedColor(_ color: Color) -> AnimatedTabBar { 229 | var switcher = self 230 | switcher.unselectedColor = color 231 | return switcher 232 | } 233 | 234 | public func ballColor(_ color: Color) -> AnimatedTabBar { 235 | var switcher = self 236 | switcher.ballColor = color 237 | return switcher 238 | } 239 | 240 | public func verticalPadding(_ verticalPadding: CGFloat) -> AnimatedTabBar { 241 | var switcher = self 242 | switcher.verticalPadding = verticalPadding 243 | return switcher 244 | } 245 | 246 | public func cornerRadius(_ cornerRadius: CGFloat) -> AnimatedTabBar { 247 | var switcher = self 248 | switcher.cornerRadius = cornerRadius 249 | return switcher 250 | } 251 | 252 | public func ballAnimation(_ ballAnimation: Animation) -> AnimatedTabBar { 253 | var switcher = self 254 | switcher.ballAnimation = ballAnimation 255 | return switcher 256 | } 257 | 258 | public func indentAnimation(_ indentAnimation: Animation) -> AnimatedTabBar { 259 | var switcher = self 260 | switcher.indentAnimation = indentAnimation 261 | return switcher 262 | } 263 | 264 | public func buttonsAnimation(_ buttonsAnimation: Animation) -> AnimatedTabBar { 265 | var switcher = self 266 | switcher.buttonsAnimation = buttonsAnimation 267 | return switcher 268 | } 269 | 270 | public func ballTrajectory(_ ballTrajectory: BallTrajectory) -> AnimatedTabBar { 271 | var switcher = self 272 | switcher.ballTrajectory = ballTrajectory 273 | return switcher 274 | } 275 | 276 | public func didSelectIndex(_ closure: @escaping (Int)->()) -> AnimatedTabBar { 277 | var switcher = self 278 | switcher.didSelectIndex = closure 279 | return switcher 280 | } 281 | } 282 | -------------------------------------------------------------------------------- /Sources/AnimatedTabBar/BezierPathLength.swift: -------------------------------------------------------------------------------- 1 | // 2 | // BezierPathLength.swift 3 | // FloatingButton 4 | // 5 | // Created by Alisa Mylnikova on 27/11/2019. 6 | // Copyright © 2019 Exyte. All rights reserved. 7 | // 8 | 9 | import SwiftUI 10 | 11 | extension Path { 12 | 13 | /// Length of path in pt 14 | public var length: CGFloat { 15 | cgPath.length 16 | } 17 | 18 | /// Get the point on the path at the given percentage 19 | /// 20 | /// - Parameter percent: Percentage of path, between 0.0 and 1.0 (can be outside) 21 | /// - Returns: Point on the path 22 | public func point(at percent: CGFloat) -> CGPoint? { 23 | cgPath.point(at: percent) 24 | } 25 | 26 | } 27 | 28 | public extension CGPath { 29 | 30 | typealias PathApplier = @convention(block) (UnsafePointer) -> Void 31 | 32 | func apply(with applier: @escaping PathApplier) { 33 | 34 | let callback: @convention(c) (UnsafeMutableRawPointer, UnsafePointer) -> Void = { (info, element) in 35 | let block = unsafeBitCast(info, to: PathApplier.self) 36 | block(element) 37 | } 38 | 39 | self.apply(info: unsafeBitCast(applier, to: UnsafeMutableRawPointer.self), function: unsafeBitCast(callback, to: CGPathApplierFunction.self)) 40 | } 41 | 42 | internal var elements: [PathElement] { 43 | var pathElements = [PathElement]() 44 | apply { (element) in 45 | let pathElement = PathElement(element: element.pointee) 46 | pathElements.append(pathElement) 47 | } 48 | return pathElements 49 | } 50 | 51 | /// Length of path in pt 52 | var length: CGFloat { 53 | getLength(with: elements) 54 | } 55 | 56 | /// Get the point on the path at the given percentage 57 | /// 58 | /// - Parameter percent: Percentage of path, between 0.0 and 1.0 (inclusive) 59 | /// - Returns: Point on the path 60 | func point(at percent: CGFloat) -> CGPoint? { 61 | point(at: percent, with: elements) 62 | } 63 | 64 | } 65 | 66 | extension CGPath { 67 | 68 | // MARK: - Internal 69 | 70 | func point(at percent: CGFloat, with elements: [PathElement]) -> CGPoint? { 71 | 72 | let percentLength = length * percent 73 | var lengthTraversed: CGFloat = 0 74 | var firstPointInSubpath: CGPoint? 75 | 76 | /// Holds current point on the path (must never be a control point) 77 | var currentPoint: CGPoint? 78 | 79 | for e in elements { 80 | switch(e) { 81 | case let .move(to: p0): 82 | currentPoint = p0 83 | if firstPointInSubpath == nil { 84 | firstPointInSubpath = p0 85 | } 86 | break 87 | 88 | case let .addLine(to: p1): 89 | guard let p0 = currentPoint else { 90 | assert(false, "Expected current point") 91 | break 92 | } 93 | let l = linearLength(p0: p0, p1: p1) 94 | if lengthTraversed + l >= percentLength || lengthTraversed + l == length { 95 | let lengthInSubpath = percentLength - lengthTraversed; 96 | let t = lengthInSubpath / l 97 | return linearPoint(t: t, p0: p0, p1: p1) 98 | } 99 | lengthTraversed += l 100 | currentPoint = p1 101 | break 102 | 103 | case let .addQuadCurve(c1, to: p1): 104 | guard let p0 = currentPoint else { 105 | assert(false, "Expected current point") 106 | break 107 | } 108 | let l = quadCurveLength(p0: p0, c1: c1, p1: p1) 109 | if lengthTraversed + l >= percentLength || lengthTraversed + l == length { 110 | let lengthInSubpath = percentLength - lengthTraversed 111 | let t = lengthInSubpath / l 112 | return quadCurvePoint(t: t, p0: p0, c1: c1, p1: p1) 113 | } 114 | lengthTraversed += l 115 | currentPoint = p1 116 | break 117 | 118 | case let .addCurve(c1, c2, to: p1): 119 | guard let p0 = currentPoint else { 120 | assert(false, "Expected current point") 121 | break 122 | } 123 | let l = cubicCurveLength(p0: p0, c1: c1, c2: c2, p1: p1) 124 | if lengthTraversed + l >= percentLength || lengthTraversed + l == length { 125 | let lengthInSubpath = percentLength - lengthTraversed 126 | let t = lengthInSubpath / l 127 | return cubicCurvePoint(t: t, p0: p0, c1: c1, c2: c2, p1: p1) 128 | } 129 | lengthTraversed += l 130 | currentPoint = p1 131 | break 132 | 133 | case .closeSubpath: 134 | guard let p0 = currentPoint else { 135 | break 136 | } 137 | if let p1 = firstPointInSubpath { 138 | let l = linearLength(p0: p0, p1: p1) 139 | if lengthTraversed + l >= percentLength || lengthTraversed + l == length { 140 | let lengthInSubpath = percentLength - lengthTraversed; 141 | let t = lengthInSubpath / l 142 | return linearPoint(t: t, p0: p0, p1: p1) 143 | } 144 | lengthTraversed += l 145 | currentPoint = p1 146 | } 147 | firstPointInSubpath = nil 148 | break 149 | } 150 | } 151 | 152 | return nil 153 | } 154 | 155 | func getLength(with elements: [PathElement]) -> CGFloat { 156 | 157 | var firstPointInSubpath: CGPoint? 158 | var length: CGFloat = 0 159 | 160 | /// Holds current point on the path (must never be a control point) 161 | var currentPoint: CGPoint? 162 | 163 | for e in elements { 164 | switch(e) { 165 | case let .move(to: p0): 166 | currentPoint = p0 167 | if firstPointInSubpath == nil { 168 | firstPointInSubpath = p0 169 | } 170 | break 171 | 172 | case let .addLine(to: p1): 173 | guard let p0 = currentPoint else { 174 | assert(false, "Expected current point") 175 | break 176 | } 177 | length += linearLength(p0: p0, p1: p1) 178 | currentPoint = p1 179 | break 180 | 181 | case let .addQuadCurve(c1, to: p1): 182 | guard let p0 = currentPoint else { 183 | assert(false, "Expected current point") 184 | break 185 | } 186 | length += quadCurveLength(p0: p0, c1: c1, p1: p1) 187 | currentPoint = p1 188 | break 189 | 190 | case let .addCurve(c1, c2, to: p1): 191 | guard let p0 = currentPoint else { 192 | assert(false, "Expected current point") 193 | break 194 | } 195 | length += cubicCurveLength(p0: p0, c1: c1, c2: c2, p1: p1) 196 | currentPoint = p1 197 | break 198 | 199 | case .closeSubpath: 200 | guard let p0 = currentPoint else { 201 | break 202 | } 203 | if let p1 = firstPointInSubpath { 204 | length += linearLength(p0: p0, p1: p1) 205 | currentPoint = p1 206 | } 207 | firstPointInSubpath = nil 208 | break 209 | } 210 | } 211 | 212 | return length 213 | 214 | } 215 | 216 | // MARK: - Linear 217 | 218 | func linearLength(p0: CGPoint, p1: CGPoint) -> CGFloat { 219 | p0.distance(to: p1) 220 | } 221 | 222 | func linearPoint(t: CGFloat, p0: CGPoint, p1: CGPoint) -> CGPoint { 223 | let x = linearValue(t: t, p0: p0.x, p1: p1.x) 224 | let y = linearValue(t: t, p0: p0.y, p1: p1.y) 225 | return CGPoint(x: x, y: y) 226 | } 227 | 228 | func linearValue(t: CGFloat, p0: CGFloat, p1: CGFloat) -> CGFloat { 229 | var value: CGFloat = 0.0 230 | // (1-t) * p0 + t * p1 231 | value += (1-t) * p0 232 | value += t * p1 233 | return value 234 | } 235 | 236 | // MARK: - Quadratic 237 | 238 | func quadCurveLength(p0: CGPoint, c1: CGPoint, p1: CGPoint) -> CGFloat { 239 | 240 | var approxDist: CGFloat = 0 241 | let approxSteps: CGFloat = 100 242 | 243 | for i in 0.. CGPoint { 257 | let x = quadCurveValue(t: t, p0: p0.x, c1: c1.x, p1: p1.x) 258 | let y = quadCurveValue(t: t, p0: p0.y, c1: c1.y, p1: p1.y) 259 | return CGPoint(x: x, y: y) 260 | } 261 | 262 | func quadCurveValue(t: CGFloat, p0: CGFloat, c1: CGFloat, p1: CGFloat) -> CGFloat { 263 | var value: CGFloat = 0.0 264 | // (1-t)^2 * p0 + 2 * (1-t) * t * c1 + t^2 * p1 265 | value += pow(1-t, 2) * p0 266 | value += 2 * (1-t) * t * c1 267 | value += pow(t, 2) * p1 268 | return value 269 | } 270 | 271 | // MARK: - Cubic 272 | 273 | func cubicCurveLength(p0: CGPoint, c1: CGPoint, c2: CGPoint, p1: CGPoint) -> CGFloat { 274 | 275 | var approxDist: CGFloat = 0 276 | let approxSteps: CGFloat = 100 277 | 278 | for i in 0.. CGPoint { 293 | let x = cubicCurveValue(t: t, p0: p0.x, c1: c1.x, c2: c2.x, p1: p1.x) 294 | let y = cubicCurveValue(t: t, p0: p0.y, c1: c1.y, c2: c2.y, p1: p1.y) 295 | return CGPoint(x: x, y: y) 296 | } 297 | 298 | func cubicCurveValue(t: CGFloat, p0: CGFloat, c1: CGFloat, c2: CGFloat, p1: CGFloat) -> CGFloat { 299 | var value: CGFloat = 0.0 300 | 301 | // (1-t)^3 * p0 + 3 * (1-t)^2 * t * c1 + 3 * (1-t) * t^2 * c2 + t^3 * p1 302 | value += pow(1-t, 3) * p0 303 | value += 3 * pow(1-t, 2) * t * c1 304 | value += 3 * (1-t) * pow(t, 2) * c2 305 | value += pow(t, 3) * p1 306 | 307 | return value 308 | } 309 | 310 | } 311 | 312 | extension CGPoint { 313 | 314 | func distance(to point: CGPoint) -> CGFloat { 315 | let a = self 316 | let b = point 317 | return sqrt(pow(a.x-b.x, 2) + pow(a.y-b.y, 2)) 318 | } 319 | } 320 | 321 | /// Swifty version of `CGPathElement` & `CGPathElementType` 322 | enum PathElement { 323 | 324 | /// The path element that starts a new subpath. The element holds a single point for the destination. 325 | case move(to: CGPoint) 326 | 327 | /// The path element that adds a line from the current point to a new point. The element holds a single point for the destination. 328 | case addLine(to: CGPoint) 329 | 330 | /// The path element that adds a quadratic curve from the current point to the specified point. The element holds a control point and a destination point. 331 | case addQuadCurve(CGPoint, to: CGPoint) 332 | 333 | /// The path element that adds a cubic curve from the current point to the specified point. The element holds two control points and a destination point. 334 | case addCurve(CGPoint, CGPoint, to: CGPoint) 335 | 336 | /// The path element that closes and completes a subpath. The element does not contain any points. 337 | case closeSubpath 338 | 339 | init(element: CGPathElement) { 340 | switch element.type { 341 | case .moveToPoint: 342 | self = .move(to: element.points[0]) 343 | case .addLineToPoint: 344 | self = .addLine(to: element.points[0]) 345 | case .addQuadCurveToPoint: 346 | self = .addQuadCurve(element.points[0], to: element.points[1]) 347 | case .addCurveToPoint: 348 | self = .addCurve(element.points[0], element.points[1], to: element.points[2]) 349 | case .closeSubpath: 350 | self = .closeSubpath 351 | @unknown default: 352 | fatalError() 353 | } 354 | } 355 | } 356 | -------------------------------------------------------------------------------- /Sources/AnimatedTabBar/ButtonsBarLayout.swift: -------------------------------------------------------------------------------- 1 | // 2 | // ButtonsBarLayout.swift 3 | // 4 | // 5 | // Created by Alisa Mylnikova on 26.01.2023. 6 | // 7 | 8 | import SwiftUI 9 | 10 | let buttonsBarSpace = "ButtonsBarSpace" 11 | 12 | struct ButtonsBar: Layout { 13 | 14 | func sizeThatFits(proposal: ProposedViewSize, subviews: Subviews, cache: inout ()) -> CGSize { 15 | let idealViewSizes = subviews.map { $0.sizeThatFits(.unspecified) } 16 | let height = idealViewSizes.reduce(0) { max($0, $1.height) } 17 | 18 | return CGSize(width: proposal.width ?? 0, height: height) 19 | } 20 | 21 | func placeSubviews(in bounds: CGRect, proposal: ProposedViewSize, subviews: Subviews, cache: inout ()) { 22 | var pt = CGPoint(x: bounds.minX, y: bounds.minY) 23 | let widthDelta = bounds.width / CGFloat(subviews.count) 24 | 25 | for v in subviews { 26 | let idealViewSize = v.sizeThatFits(.unspecified) 27 | let x = pt.x + widthDelta/2 - idealViewSize.width/2 28 | let y = bounds.midY - idealViewSize.height/2 29 | let point = CGPoint(x: x, y: y) 30 | 31 | v.place(at: point, anchor: .topLeading, proposal: .unspecified) 32 | 33 | pt.x += widthDelta 34 | } 35 | } 36 | } 37 | 38 | struct ButtonPreferenceKey: PreferenceKey { 39 | typealias Value = [CGRect] 40 | 41 | static let defaultValue: Value = [] 42 | 43 | static func reduce(value: inout Value, nextValue: () -> Value) { 44 | value.append(contentsOf: nextValue()) 45 | } 46 | } 47 | 48 | struct ButtonPreferenceViewSetter: View { 49 | 50 | var body: some View { 51 | GeometryReader { geometry in 52 | Rectangle() 53 | .fill(Color.clear) 54 | .preference(key: ButtonPreferenceKey.self, 55 | value: [geometry.frame(in: .named(buttonsBarSpace))]) 56 | } 57 | } 58 | } 59 | 60 | -------------------------------------------------------------------------------- /Sources/AnimatedTabBar/GeometryEffects.swift: -------------------------------------------------------------------------------- 1 | // 2 | // GeometryEffect.swift 3 | // 4 | // 5 | // Created by Alisa Mylnikova on 24.01.2023. 6 | // 7 | 8 | import SwiftUI 9 | 10 | struct AlongPath: GeometryEffect { 11 | 12 | var t: CGFloat 13 | var trajectory: Path 14 | 15 | var animatableData: CGFloat { 16 | get { t } 17 | set { t = newValue } 18 | } 19 | 20 | public func effectValue(size: CGSize) -> ProjectionTransform { 21 | if let point = trajectory.point(at: t) { 22 | return ProjectionTransform(CGAffineTransform(translationX: point.x, y: point.y)) 23 | } 24 | return ProjectionTransform() 25 | } 26 | } 27 | 28 | extension View { 29 | public func alongPath(t: CGFloat, trajectory: Path) -> some View { 30 | self.modifier(AlongPath(t: t, trajectory: trajectory)) 31 | } 32 | } 33 | 34 | struct TeleportEffect: GeometryEffect { 35 | 36 | var t: CGFloat 37 | var from: CGFloat 38 | var to: CGFloat 39 | 40 | // fraction of full animation time in which animation should happen 41 | var fraction: CGFloat = 0.2 42 | 43 | var animatableData: CGFloat { 44 | get { t } 45 | set { t = newValue } 46 | } 47 | 48 | var scale: CGFloat { 49 | if t < fraction { // 0...0.1 -> 1...0 50 | return 1 - t*1/fraction 51 | } 52 | if t > 1 - fraction { // 0.9...1 -> 0...1 53 | return (t - (1-fraction)) * 1/fraction 54 | } 55 | return -5000 56 | } 57 | 58 | var anchor: CGFloat { 59 | t < 0.5 ? t*2 : (1-t)*2 60 | } 61 | 62 | public func effectValue(size: CGSize) -> ProjectionTransform { 63 | ProjectionTransform(CGAffineTransform(translationX: t < 0.5 ? from : to, y: 0) 64 | .translatedBy(x: size.width * anchor, y: size.height * anchor) 65 | .scaledBy(x: scale, y: scale)) 66 | } 67 | } 68 | 69 | extension View { 70 | public func teleportEffect(t: CGFloat, from: CGFloat, to: CGFloat) -> some View { 71 | self.modifier(TeleportEffect(t: t, from: from, to: to)) 72 | } 73 | } 74 | -------------------------------------------------------------------------------- /Sources/AnimatedTabBar/IndentableRect.swift: -------------------------------------------------------------------------------- 1 | // 2 | // IndentableRect.swift 3 | // 4 | // 5 | // Created by Alisa Mylnikova on 24.01.2023. 6 | // 7 | 8 | import SwiftUI 9 | 10 | struct IndentableRect: Shape { 11 | 12 | var t: CGFloat 13 | 14 | // when animating 0 -> 1: do nothing until delay, then animate quickly from delay to 1 15 | // when animating 1 -> 0: animate quickly 1 to delay, then do nothing from delay to 0 16 | var delay: CGFloat = 0 17 | 18 | var animatableData: CGFloat { 19 | get { t } 20 | set { t = newValue } 21 | } 22 | 23 | func path(in rect: CGRect) -> Path { 24 | var t = t 25 | if t < delay { 26 | t = 0 27 | } else { 28 | t = (t - delay) * 1/(1-delay) 29 | } 30 | 31 | let tl = rect.origin 32 | let tr = CGPoint(x: rect.maxX, y: rect.minY) 33 | let bl = CGPoint(x: rect.minX, y: rect.maxY) 34 | let br = CGPoint(x: rect.maxX, y: rect.maxY) 35 | 36 | let yCurve = t * 15 37 | let indentWidth = 60.0 38 | 39 | let indentPath = TranslatedPath(rect: CGRect( 40 | x: rect.midX - indentWidth/2, 41 | y: rect.minY, 42 | width: indentWidth, 43 | height: yCurve) 44 | ).path() 45 | 46 | var path = Path() 47 | path.move(to: tl) 48 | path.addPath(indentPath) 49 | path.addLine(to: tr) 50 | path.addLine(to: br) 51 | path.addLine(to: bl) 52 | path.addLine(to: tl) 53 | return path 54 | } 55 | } 56 | 57 | struct TranslatedPath { 58 | 59 | // svg path 60 | // M 0 0 61 | // C 11.5 0 19.5 17 27.5 17 62 | // C 35.5 17 43.5 0 55 0 63 | 64 | let maxX = 55.0 65 | let maxY = 17.0 66 | 67 | let rect: CGRect 68 | 69 | func translate(x: CGFloat, y: CGFloat) -> CGPoint { 70 | CGPoint(x: x / maxX * rect.width + rect.minX, y: y / maxY * rect.height + rect.minY) 71 | } 72 | 73 | func path() -> Path { 74 | 75 | let t1 = translate(x: 0, y: 0) 76 | let t2 = translate(x: 27.5, y: 17) 77 | let t3 = translate(x: 55, y: 0) 78 | 79 | let c1 = translate(x: 11.5, y: 0) 80 | let c2 = translate(x: 19.5, y: 17) 81 | let c3 = translate(x: 35.5, y: 17) 82 | let c4 = translate(x: 43.5, y: 0) 83 | 84 | var path = Path() 85 | path.move(to: t1) 86 | path.addCurve(to: t2, control1: c1, control2: c2) 87 | path.addCurve(to: t3, control1: c3, control2: c4) 88 | return path 89 | } 90 | } 91 | 92 | struct SlidingIndentRect: Shape { 93 | 94 | var t: CGFloat 95 | 96 | var indentX: CGFloat 97 | var prevIndentX: CGFloat 98 | 99 | var animatableData: CGFloat { 100 | get { t } 101 | set { t = newValue } 102 | } 103 | 104 | func path(in rect: CGRect) -> Path { 105 | let tl = rect.origin 106 | let tr = CGPoint(x: rect.maxX, y: rect.minY) 107 | let bl = CGPoint(x: rect.minX, y: rect.maxY) 108 | let br = CGPoint(x: rect.maxX, y: rect.maxY) 109 | 110 | let indentWidth = 60.0 111 | 112 | let indentPath = TranslatedPath(rect: CGRect( 113 | x: prevIndentX + (indentX - prevIndentX) * t - indentWidth/2, 114 | y: rect.minY, 115 | width: indentWidth, 116 | height: 15) 117 | ).path() 118 | 119 | var path = Path() 120 | path.move(to: tl) 121 | path.addPath(indentPath) 122 | path.addLine(to: tr) 123 | path.addLine(to: br) 124 | path.addLine(to: bl) 125 | path.addLine(to: tl) 126 | return path 127 | } 128 | } 129 | -------------------------------------------------------------------------------- /Sources/AnimatedTabBar/TabBarButtons/DropletButton.swift: -------------------------------------------------------------------------------- 1 | // 2 | // SwiftUIView.swift 3 | // 4 | // 5 | // Created by Alisa Mylnikova on 24.01.2023. 6 | // 7 | 8 | import SwiftUI 9 | 10 | public struct DropletButton: View { 11 | 12 | public var imageName: String 13 | public var dropletColor: Color 14 | public var isSelected: Bool 15 | 16 | public init(imageName: String, dropletColor: Color, isSelected: Bool) { 17 | self.imageName = imageName 18 | self.dropletColor = dropletColor 19 | self.isSelected = isSelected 20 | } 21 | 22 | @State var t: CGFloat = 0 23 | 24 | public var body: some View { 25 | DropletButtonAnimatable(imageName: imageName, dropletColor: dropletColor, t: t) 26 | .onChange(of: isSelected) { newValue in 27 | if newValue { 28 | withAnimation(.linear(duration: 0.9)) { 29 | t = 1 30 | } 31 | } else { 32 | t = 0 33 | } 34 | } 35 | .onAppear { 36 | if isSelected { 37 | t = 1 38 | } 39 | } 40 | } 41 | } 42 | 43 | struct DropletButtonAnimatable: View, Animatable { 44 | 45 | var imageName: String 46 | var dropletColor: Color 47 | var t: CGFloat 48 | 49 | public init(imageName: String, dropletColor: Color, t: CGFloat) { 50 | self.imageName = imageName 51 | self.dropletColor = dropletColor 52 | self.t = t 53 | } 54 | 55 | nonisolated public var animatableData: CGFloat { 56 | get { t } 57 | set { t = newValue } 58 | } 59 | 60 | @State private var frame: CGRect = .zero 61 | 62 | private var scale: CGFloat { 63 | var t = t 64 | if t < 0.3 { // 0...0.3 -> 0...1 65 | t = t*3.33 66 | } else { // 0.3...0.6 -> 1...0; 0.6...1 -> 0 67 | t = max((0.6 - t) * 3.33, 0) 68 | } 69 | return 1 - 0.2 * t 70 | } 71 | 72 | private var dropletParam: CGFloat { 73 | if t < 0.3 { 74 | return 0 75 | } else { 76 | return (t - 0.3) * 1/0.7 77 | } 78 | } 79 | 80 | public var body: some View { 81 | ZStack { 82 | Image(imageName) 83 | .padding(.vertical, 10) 84 | Droplet(t: dropletParam) 85 | .mask(t > 0.5 ? AnyView(Image(imageName)) : AnyView(Rectangle().frame(width: frame.width, height: frame.height))) 86 | .foregroundColor(dropletColor) 87 | } 88 | .scaleEffect(scale) 89 | .frameGetter($frame) 90 | } 91 | } 92 | 93 | struct Droplet: Shape { 94 | 95 | var t: CGFloat 96 | 97 | func path(in rect: CGRect) -> Path { 98 | let param = t * 20 99 | let inset = min(t * 5, 1) * 15 100 | 101 | var path = Path() 102 | path.addArc(center: CGPoint(x: rect.midX, y: rect.minY + inset), radius: param, startAngle: Angle(radians: 0), endAngle: Angle(radians: 2 * .pi), clockwise: false) 103 | return path 104 | } 105 | } 106 | -------------------------------------------------------------------------------- /Sources/AnimatedTabBar/TabBarButtons/WiggleButton.swift: -------------------------------------------------------------------------------- 1 | // 2 | // SwiftUIView.swift 3 | // 4 | // 5 | // Created by Alisa Mylnikova on 24.01.2023. 6 | // 7 | 8 | import SwiftUI 9 | 10 | public struct WiggleButton: View { 11 | 12 | public var image: Image 13 | public var maskImage: Image 14 | public var imageSize: CGFloat 15 | public var isSelected: Bool 16 | 17 | public init(image: Image, maskImage: Image, imageSize: CGFloat? = nil, isSelected: Bool) { 18 | self.image = image 19 | self.maskImage = maskImage 20 | self.imageSize = imageSize ?? 20 21 | self.isSelected = isSelected 22 | } 23 | 24 | @State var t: CGFloat = 0 25 | @State var tForBg: CGFloat = 0 26 | 27 | var scale: CGFloat { 28 | 1 + t * 0.2 29 | } 30 | 31 | public var body: some View { 32 | ZStack { 33 | WiggleButtonBg(t: tForBg) 34 | .opacity(0.4) 35 | .mask( 36 | maskImage 37 | .imageResizer(imageSize) 38 | ) 39 | image 40 | .imageResizer(imageSize) 41 | } 42 | .scaleEffect(scale) 43 | .onChange(of: isSelected) { newValue in 44 | if newValue { 45 | withAnimation(.interpolatingSpring(stiffness: 300, damping: 5)) { 46 | tForBg = 1 47 | } 48 | withAnimation { 49 | t = 1 50 | } 51 | } else { 52 | tForBg = 0 53 | withAnimation { 54 | t = 0 55 | } 56 | } 57 | } 58 | .onAppear { 59 | if isSelected { 60 | t = 1 61 | } 62 | } 63 | } 64 | } 65 | 66 | struct WiggleButtonBg: Shape { 67 | 68 | var t: CGFloat 69 | 70 | var animatableData: CGFloat { 71 | get { t } 72 | set { t = newValue } 73 | } 74 | 75 | func path(in rect: CGRect) -> Path { 76 | var t = t 77 | if t < 0.5 { 78 | t = t*2 79 | } else { 80 | t = (1 - t)*2 81 | } 82 | 83 | let param = t * 2 84 | var path = Path() 85 | path.addArc(center: CGPoint(x: rect.midX, y: rect.maxY), radius: 10 + param, startAngle: Angle(radians: 0), endAngle: Angle(radians: .pi), clockwise: true) 86 | return path 87 | } 88 | } 89 | -------------------------------------------------------------------------------- /Sources/AnimatedTabBar/Utils.swift: -------------------------------------------------------------------------------- 1 | // 2 | // Utils.swift 3 | // AnimatedTabBar 4 | // 5 | // Created by Alisa Mylnikova on 23.01.2023. 6 | // 7 | 8 | import SwiftUI 9 | 10 | extension TupleView { 11 | var getViews: [AnyView] { 12 | makeArray(from: value) 13 | } 14 | 15 | private struct GenericView { 16 | let body: Any 17 | 18 | var anyView: AnyView? { 19 | AnyView(_fromValue: body) 20 | } 21 | } 22 | 23 | private func makeArray(from tuple: Tuple) -> [AnyView] { 24 | func convert(child: Mirror.Child) -> AnyView? { 25 | withUnsafeBytes(of: child.value) { ptr -> AnyView? in 26 | let binded = ptr.bindMemory(to: GenericView.self) 27 | return binded.first?.anyView 28 | } 29 | } 30 | 31 | let tupleMirror = Mirror(reflecting: tuple) 32 | return tupleMirror.children.compactMap(convert) 33 | } 34 | } 35 | 36 | extension Collection { 37 | /// Returns the element at the specified index if it is within bounds, otherwise nil. 38 | subscript (safe index: Index) -> Element? { 39 | return indices.contains(index) ? self[index] : nil 40 | } 41 | } 42 | 43 | struct FrameGetter: ViewModifier { 44 | 45 | @Binding var frame: CGRect 46 | 47 | func body(content: Content) -> some View { 48 | content 49 | .background( 50 | GeometryReader { proxy -> AnyView in 51 | DispatchQueue.main.async { 52 | let rect = proxy.frame(in: .global) 53 | // This avoids an infinite layout loop 54 | if rect.integral != self.frame.integral { 55 | self.frame = rect 56 | } 57 | } 58 | return AnyView(EmptyView()) 59 | } 60 | ) 61 | } 62 | } 63 | 64 | extension View { 65 | public func frameGetter(_ frame: Binding) -> some View { 66 | modifier(FrameGetter(frame: frame)) 67 | } 68 | } 69 | 70 | extension Image { 71 | func imageResizer(_ size: CGFloat) -> some View { 72 | self 73 | .resizable() 74 | .aspectRatio(contentMode: .fit) 75 | .frame(width: size, height: size) 76 | } 77 | } 78 | --------------------------------------------------------------------------------