├── .DS_Store ├── .gitignore ├── .swiftpm └── xcode │ └── package.xcworkspace │ └── contents.xcworkspacedata ├── Example ├── .DS_Store ├── Example.xcodeproj │ ├── project.pbxproj │ └── project.xcworkspace │ │ ├── contents.xcworkspacedata │ │ └── xcshareddata │ │ └── IDEWorkspaceChecks.plist └── Example │ ├── Assets.xcassets │ ├── AccentColor.colorset │ │ └── Contents.json │ ├── AppIcon.appiconset │ │ └── Contents.json │ ├── Contents.json │ └── ants.imageset │ │ ├── Contents.json │ │ └── maxresdefault.jpg │ ├── ContentView.swift │ ├── ExampleApp.swift │ ├── Preview Content │ └── Preview Assets.xcassets │ │ └── Contents.json │ └── Sigh.swift ├── LICENSE ├── Package.swift ├── README.md ├── Sources ├── .DS_Store └── AntsInMyPants │ ├── AntiAliasedRectangle.swift │ ├── AntsInMyPants.swift │ ├── ContentSizeObserver.swift │ ├── DisplayLink.swift │ └── Radians.swift └── tilt.gif /.DS_Store: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/jaredsinclair/antsinmypants/d736a5d569bacc143f0f08eea8edc84e83e37e3e/.DS_Store -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | # Xcode 2 | # 3 | # gitignore contributors: remember to update Global/Xcode.gitignore, Objective-C.gitignore & Swift.gitignore 4 | 5 | ## User settings 6 | xcuserdata/ 7 | 8 | ## compatibility with Xcode 8 and earlier (ignoring not required starting Xcode 9) 9 | *.xcscmblueprint 10 | *.xccheckout 11 | 12 | ## compatibility with Xcode 3 and earlier (ignoring not required starting Xcode 4) 13 | build/ 14 | DerivedData/ 15 | *.moved-aside 16 | *.pbxuser 17 | !default.pbxuser 18 | *.mode1v3 19 | !default.mode1v3 20 | *.mode2v3 21 | !default.mode2v3 22 | *.perspectivev3 23 | !default.perspectivev3 24 | 25 | ## Obj-C/Swift specific 26 | *.hmap 27 | 28 | ## App packaging 29 | *.ipa 30 | *.dSYM.zip 31 | *.dSYM 32 | 33 | ## Playgrounds 34 | timeline.xctimeline 35 | playground.xcworkspace 36 | 37 | # Swift Package Manager 38 | # 39 | # Add this line if you want to avoid checking in source code from Swift Package Manager dependencies. 40 | # Packages/ 41 | # Package.pins 42 | # Package.resolved 43 | # *.xcodeproj 44 | # 45 | # Xcode automatically generates this directory with a .xcworkspacedata file and xcuserdata 46 | # hence it is not needed unless you have added a package configuration file to your project 47 | # .swiftpm 48 | 49 | .build/ 50 | 51 | # CocoaPods 52 | # 53 | # We recommend against adding the Pods directory to your .gitignore. However 54 | # you should judge for yourself, the pros and cons are mentioned at: 55 | # https://guides.cocoapods.org/using/using-cocoapods.html#should-i-check-the-pods-directory-into-source-control 56 | # 57 | # Pods/ 58 | # 59 | # Add this line if you want to avoid checking in source code from the Xcode workspace 60 | # *.xcworkspace 61 | 62 | # Carthage 63 | # 64 | # Add this line if you want to avoid checking in source code from Carthage dependencies. 65 | # Carthage/Checkouts 66 | 67 | Carthage/Build/ 68 | 69 | # Accio dependency management 70 | Dependencies/ 71 | .accio/ 72 | 73 | # fastlane 74 | # 75 | # It is recommended to not store the screenshots in the git repo. 76 | # Instead, use fastlane to re-generate the screenshots whenever they are needed. 77 | # For more information about the recommended setup visit: 78 | # https://docs.fastlane.tools/best-practices/source-control/#source-control 79 | 80 | fastlane/report.xml 81 | fastlane/Preview.html 82 | fastlane/screenshots/**/*.png 83 | fastlane/test_output 84 | 85 | # Code Injection 86 | # 87 | # After new code Injection tools there's a generated folder /iOSInjectionProject 88 | # https://github.com/johnno1962/injectionforxcode 89 | 90 | iOSInjectionProject/ 91 | 92 | # Sigh... 93 | *.DS_Store -------------------------------------------------------------------------------- /.swiftpm/xcode/package.xcworkspace/contents.xcworkspacedata: -------------------------------------------------------------------------------- 1 | 2 | 4 | 6 | 7 | 8 | -------------------------------------------------------------------------------- /Example/.DS_Store: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/jaredsinclair/antsinmypants/d736a5d569bacc143f0f08eea8edc84e83e37e3e/Example/.DS_Store -------------------------------------------------------------------------------- /Example/Example.xcodeproj/project.pbxproj: 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/Example/Example.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | IDEDidComputeMac32BitWarning 6 | 7 | 8 | 9 | -------------------------------------------------------------------------------- /Example/Example/Assets.xcassets/AccentColor.colorset/Contents.json: -------------------------------------------------------------------------------- 1 | { 2 | "colors" : [ 3 | { 4 | "idiom" : "universal" 5 | } 6 | ], 7 | "info" : { 8 | "author" : "xcode", 9 | "version" : 1 10 | } 11 | } 12 | -------------------------------------------------------------------------------- /Example/Example/Assets.xcassets/AppIcon.appiconset/Contents.json: -------------------------------------------------------------------------------- 1 | { 2 | "images" : [ 3 | { 4 | "idiom" : "iphone", 5 | "scale" : "2x", 6 | "size" : "20x20" 7 | }, 8 | { 9 | "idiom" : "iphone", 10 | "scale" : "3x", 11 | "size" : "20x20" 12 | }, 13 | { 14 | "idiom" : "iphone", 15 | "scale" : "2x", 16 | "size" : "29x29" 17 | }, 18 | { 19 | "idiom" : "iphone", 20 | "scale" : "3x", 21 | "size" : "29x29" 22 | }, 23 | { 24 | "idiom" : "iphone", 25 | "scale" : "2x", 26 | "size" : "40x40" 27 | }, 28 | { 29 | "idiom" : "iphone", 30 | "scale" : "3x", 31 | "size" : "40x40" 32 | }, 33 | { 34 | "idiom" : "iphone", 35 | "scale" : "2x", 36 | "size" : "60x60" 37 | }, 38 | { 39 | "idiom" : "iphone", 40 | "scale" : "3x", 41 | "size" : "60x60" 42 | }, 43 | { 44 | "idiom" : "ipad", 45 | "scale" : "1x", 46 | "size" : "20x20" 47 | }, 48 | { 49 | "idiom" : "ipad", 50 | "scale" : "2x", 51 | "size" : "20x20" 52 | }, 53 | { 54 | "idiom" : "ipad", 55 | "scale" : "1x", 56 | "size" : "29x29" 57 | }, 58 | { 59 | "idiom" : "ipad", 60 | "scale" : "2x", 61 | "size" : "29x29" 62 | }, 63 | { 64 | "idiom" : "ipad", 65 | "scale" : "1x", 66 | "size" : "40x40" 67 | }, 68 | { 69 | "idiom" : "ipad", 70 | "scale" : "2x", 71 | "size" : "40x40" 72 | }, 73 | { 74 | "idiom" : "ipad", 75 | "scale" : "1x", 76 | "size" : "76x76" 77 | }, 78 | { 79 | "idiom" : "ipad", 80 | "scale" : "2x", 81 | "size" : "76x76" 82 | }, 83 | { 84 | "idiom" : "ipad", 85 | "scale" : "2x", 86 | "size" : "83.5x83.5" 87 | }, 88 | { 89 | "idiom" : "ios-marketing", 90 | "scale" : "1x", 91 | "size" : "1024x1024" 92 | } 93 | ], 94 | "info" : { 95 | "author" : "xcode", 96 | "version" : 1 97 | } 98 | } 99 | -------------------------------------------------------------------------------- /Example/Example/Assets.xcassets/Contents.json: -------------------------------------------------------------------------------- 1 | { 2 | "info" : { 3 | "author" : "xcode", 4 | "version" : 1 5 | } 6 | } 7 | -------------------------------------------------------------------------------- /Example/Example/Assets.xcassets/ants.imageset/Contents.json: -------------------------------------------------------------------------------- 1 | { 2 | "images" : [ 3 | { 4 | "filename" : "maxresdefault.jpg", 5 | "idiom" : "universal" 6 | } 7 | ], 8 | "info" : { 9 | "author" : "xcode", 10 | "version" : 1 11 | } 12 | } 13 | -------------------------------------------------------------------------------- /Example/Example/Assets.xcassets/ants.imageset/maxresdefault.jpg: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/jaredsinclair/antsinmypants/d736a5d569bacc143f0f08eea8edc84e83e37e3e/Example/Example/Assets.xcassets/ants.imageset/maxresdefault.jpg -------------------------------------------------------------------------------- /Example/Example/ContentView.swift: -------------------------------------------------------------------------------- 1 | import SwiftUI 2 | import AntsInMyPants 3 | 4 | struct ContentView: View { 5 | @State var wiggle: CGFloat = 1.0 6 | @State var iterations: CFTimeInterval = 1.0 7 | @State var perspective: CGFloat = 1.0 8 | 9 | var body: some View { 10 | ReadableContentContainer(emsPerLine: 35) { width in 11 | VStack(spacing: 32) { 12 | AntiAliasedRectangle(cornerRadius: 20) { 13 | Image("ants") 14 | .interpolation(.high) 15 | .resizable() 16 | .aspectRatio(contentMode: .fill) 17 | } 18 | .antsInMyPants( 19 | wiggleExaggeration: $wiggle, 20 | iterationsPerSecond: $iterations, 21 | perspectiveExaggeration: $perspective 22 | ) 23 | .shadow( 24 | color: .black.opacity(0.333), 25 | radius: 24, x: 0, y: 24 26 | ) 27 | 28 | Text("Hint: try setting the iterations per second to something super slow, around `0.1`, to mimic the animations seen in the iOS and iPadOS home screen widget pickers.") 29 | .foregroundColor(.secondary) 30 | 31 | VStack(spacing: 4) { 32 | HStack { 33 | Text("\(Double(wiggle).formatted(.number.precision(.fractionLength(2))))") 34 | Slider(value: $wiggle, in: 0...5.0) 35 | Image(systemName: "tornado").foregroundColor(.hotPink) 36 | } 37 | HStack { 38 | Text("\(Double(iterations).formatted(.number.precision(.fractionLength(2))))") 39 | Slider(value: $iterations, in: 0...5.0) 40 | Image(systemName: "clock").foregroundColor(.hotPink) 41 | } 42 | HStack { 43 | Text("\(Double(perspective).formatted(.number.precision(.fractionLength(2))))") 44 | Slider(value: $perspective, in: 0...5.0) 45 | Image(systemName: "video").foregroundColor(.hotPink) 46 | } 47 | } 48 | .font(.footnote.monospaced()) 49 | 50 | Button { 51 | wiggle = 1 52 | iterations = 1 53 | perspective = 1 54 | } label: { 55 | Label("Reset", systemImage: "arrow.counterclockwise") 56 | } 57 | 58 | } 59 | } 60 | .tint(.hotPink) 61 | } 62 | } 63 | 64 | extension Color { 65 | static var hotPink = Color(.displayP3, red: 1, green: 0, blue: 1, opacity: 1) 66 | } 67 | 68 | struct ContentView_Previews: PreviewProvider { 69 | static var previews: some View { 70 | ContentView() 71 | .previewDevice("iPad Pro (12.9-inch) (5th generation)") 72 | } 73 | } 74 | -------------------------------------------------------------------------------- /Example/Example/ExampleApp.swift: -------------------------------------------------------------------------------- 1 | import SwiftUI 2 | 3 | @main 4 | struct AntsInMyPantsApp: App { 5 | var body: some Scene { 6 | WindowGroup { 7 | ContentView() 8 | } 9 | } 10 | } 11 | -------------------------------------------------------------------------------- /Example/Example/Preview Content/Preview Assets.xcassets/Contents.json: -------------------------------------------------------------------------------- 1 | { 2 | "info" : { 3 | "author" : "xcode", 4 | "version" : 1 5 | } 6 | } 7 | -------------------------------------------------------------------------------- /Example/Example/Sigh.swift: -------------------------------------------------------------------------------- 1 | import SwiftUI 2 | import Combine 3 | 4 | struct ReadableContentContainer: View { 5 | var emsPerLine: Int = 50 6 | let content: (_ readableContentWidth: CGFloat) -> Content 7 | @StateObject private var fontReference = FontReference() 8 | 9 | var body: some View { 10 | GeometryReader { proxy in 11 | let width = readableContentWidth(in: proxy) 12 | ZStack { 13 | content(width).frame(width: width) 14 | } 15 | .frame(maxWidth: .infinity, maxHeight: .infinity) 16 | } 17 | } 18 | 19 | func readableContentWidth(in proxy: GeometryProxy) -> CGFloat { 20 | let recommended = fontReference.bodyPointSize.rounded() * CGFloat(emsPerLine) 21 | return min(recommended, proxy.size.width - 40) 22 | } 23 | } 24 | 25 | class FontReference: ObservableObject { 26 | @Published var bodyPointSize = UIFont.preferredFont(forTextStyle: .body).pointSize 27 | private var subscription: AnyCancellable? 28 | 29 | init() { 30 | subscription = NotificationCenter.default 31 | .publisher(for: UIContentSizeCategory.didChangeNotification) 32 | .sink { [weak self] _ in 33 | self?.bodyPointSize = UIFont.preferredFont(forTextStyle: .body).pointSize 34 | } 35 | } 36 | } 37 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | MIT License 2 | 3 | Copyright (c) 2022 Jared Sinclair 4 | 5 | Permission is hereby granted, free of charge, to any person obtaining a copy 6 | of this software and associated documentation files (the "Software"), to deal 7 | in the Software without restriction, including without limitation the rights 8 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 9 | copies of the Software, and to permit persons to whom the Software is 10 | furnished to do so, subject to the following conditions: 11 | 12 | The above copyright notice and this permission notice shall be included in all 13 | copies or substantial portions of the Software. 14 | 15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 18 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 19 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 20 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 21 | SOFTWARE. 22 | -------------------------------------------------------------------------------- /Package.swift: -------------------------------------------------------------------------------- 1 | // swift-tools-version:5.5 2 | // The swift-tools-version declares the minimum version of Swift required to build this package. 3 | 4 | import PackageDescription 5 | 6 | let package = Package( 7 | name: "AntsInMyPants", 8 | platforms: [ 9 | .macOS("12"), 10 | .iOS(.v15), 11 | ], 12 | products: [ 13 | .library( 14 | name: "AntsInMyPants", 15 | targets: ["AntsInMyPants"]), 16 | ], 17 | targets: [ 18 | .target(name: "AntsInMyPants") 19 | ] 20 | ) 21 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # AntsInMyPants 2 | 3 | SwiftUI extension for animating arbitrary views using an indefinite wiggle animation like that seen in the iOS and iPadOS home screen widget pickers. 4 | 5 | ![example animation](./tilt.gif) 6 | 7 | ## Usage 8 | 9 | See the example app in this repo. 10 | 11 | ## OS Support 12 | 13 | - iOS 15+ 14 | - iPadOS 15+ 15 | - macOS 12+ 16 | -------------------------------------------------------------------------------- /Sources/.DS_Store: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/jaredsinclair/antsinmypants/d736a5d569bacc143f0f08eea8edc84e83e37e3e/Sources/.DS_Store -------------------------------------------------------------------------------- /Sources/AntsInMyPants/AntiAliasedRectangle.swift: -------------------------------------------------------------------------------- 1 | import SwiftUI 2 | 3 | public struct AntiAliasedRectangle: View { 4 | public var cornerRadius: CGFloat 5 | public var rectangleAspectRatio: CGFloat 6 | public let content: () -> Content 7 | 8 | public init( 9 | cornerRadius: CGFloat = 0, 10 | rectangleAspectRatio: CGFloat = 1, 11 | content: @escaping () -> Content 12 | ) { 13 | self.cornerRadius = cornerRadius 14 | self.rectangleAspectRatio = rectangleAspectRatio 15 | self.content = content 16 | } 17 | 18 | public var body: some View { 19 | AspectRatioedRectangle { 20 | AspectRatioedRectangle( 21 | cornerRadius: cornerRadius, 22 | rectangleAspectRatio: rectangleAspectRatio, 23 | content: content 24 | ) 25 | .padding(1) 26 | } 27 | .padding(-1) 28 | } 29 | } 30 | 31 | struct AspectRatioedRectangle: View { 32 | var cornerRadius: CGFloat = 0 33 | var rectangleAspectRatio: CGFloat = 1 34 | let content: () -> Content 35 | 36 | var body: some View { 37 | Rectangle() 38 | .foregroundColor(.clear) 39 | .aspectRatio(rectangleAspectRatio, contentMode: .fit) 40 | .overlay(content: content) 41 | .cornerRadius(cornerRadius) 42 | } 43 | } 44 | -------------------------------------------------------------------------------- /Sources/AntsInMyPants/AntsInMyPants.swift: -------------------------------------------------------------------------------- 1 | import SwiftUI 2 | 3 | extension View { 4 | 5 | public func antsInMyPants( 6 | isWiggling: Binding = .constant(true), 7 | wiggleExaggeration: Binding = .constant(1.0), 8 | iterationsPerSecond: Binding = .constant(1.0), 9 | perspectiveExaggeration: Binding = .constant(1.0) 10 | ) -> some View { 11 | AntsInMyPants( 12 | isWiggling: isWiggling, 13 | wiggleExaggeration: wiggleExaggeration, 14 | iterationsPerSecond: iterationsPerSecond, 15 | perspectiveExaggeration: perspectiveExaggeration, 16 | content: { self } 17 | ) 18 | } 19 | 20 | } 21 | 22 | public struct AntsInMyPants: View { 23 | 24 | @Binding public var isWiggling: Bool 25 | @Binding public var wiggleExaggeration: CGFloat 26 | @Binding public var iterationsPerSecond: CFTimeInterval 27 | @Binding public var perspectiveExaggeration: CGFloat 28 | public let content: () -> Content 29 | 30 | @StateObject private var timer = RotationTimer() 31 | @State private var contentSize: CGSize? 32 | 33 | public var body: some View { 34 | content() 35 | .overlay { 36 | ContentSizeObserver(size: $contentSize) 37 | } 38 | .projectionEffect(transform) 39 | .task(id: isWiggling) { 40 | isWiggling ? timer.start() : timer.stop() 41 | } 42 | .task(id: iterationsPerSecond) { 43 | timer.iterationsPerSecond = iterationsPerSecond 44 | } 45 | } 46 | 47 | private var transform: ProjectionTransform { 48 | 49 | guard let contentSize = contentSize else { 50 | return ProjectionTransform(.identity) 51 | } 52 | 53 | let width = contentSize.width 54 | let height = contentSize.height 55 | 56 | var transform3d = CATransform3DIdentity 57 | 58 | // Set the perspective as a "feels nice" value according to the area. 59 | 60 | transform3d.m34 = (-1 / (width + height)) * perspectiveExaggeration 61 | 62 | // Do some math, the results of which will be used below. 63 | 64 | let baseAngle = 3.radians * wiggleExaggeration 65 | let baseShift = width * height * 0.00005 * wiggleExaggeration 66 | let yAngle, xAngle, yShift, xShift: CGFloat 67 | if width > height { 68 | yAngle = baseAngle * height/width 69 | yShift = -baseShift * height/width 70 | xAngle = baseAngle 71 | xShift = baseShift 72 | } else { 73 | yAngle = baseAngle 74 | yShift = -baseShift 75 | xAngle = baseAngle * width/height 76 | xShift = baseShift * width/height 77 | } 78 | 79 | // These next two transforms point the "face" at the desired focal point 80 | // behind the user's head, like it's watching a ellipse being drawn on a 81 | // chalkboard across a room, or a dog waiting impatiently for dinner. 82 | // The X and Y values are not changed identically. First of all, the X 83 | // curve (as seen in the RotationTimer) is deliberately out of phase 84 | // with the Y curve, which is what yields the "look left, look up, look 85 | // right, look down" effect. Second of all, the effect feels less bouncy 86 | // and more organic if the angles are in proportion to the aspect ratio 87 | // of the view being animated. 88 | 89 | transform3d = CATransform3DRotate(transform3d, yAngle * timer.elapsedTimeY, 1, 0, 0) 90 | transform3d = CATransform3DRotate(transform3d, xAngle * timer.elapsedTimeX, 0, 1, 0) 91 | 92 | // This transform makes the effect feel more natural by applying a bit 93 | // horizontal and vertical translation in the direction that the view is 94 | // facing, the way a human face moves when its head turns, or like a 95 | // flower following the sun. 96 | 97 | transform3d = CATransform3DTranslate(transform3d, xShift * timer.elapsedTimeX, yShift * timer.elapsedTimeY, 0) 98 | 99 | // These next two lines correct for SwiftUI's rather unfortunate choice 100 | // to use (0,0) as the anchor point for projection transforms. The only 101 | // other alternative is to introspect the UIKit hierarchy and modify a 102 | // layer's anchor point, which would be.........bad. 103 | 104 | transform3d = CATransform3DTranslate(transform3d, -width/2, -height/2, 0) 105 | let affineTransform = ProjectionTransform(CGAffineTransform(translationX: width/2, y: height/2)) 106 | 107 | // Voila. 108 | 109 | return ProjectionTransform(transform3d).concatenating(affineTransform) 110 | } 111 | 112 | private class RotationTimer: ObservableObject { 113 | 114 | var elapsedTimeX: CGFloat { 115 | sin(2 * .pi * (absoluteTime + 0.25)) // <---- 25% out-of-phase with the Y time 116 | } 117 | 118 | var elapsedTimeY: CGFloat { 119 | sin(2 * .pi * absoluteTime) 120 | } 121 | 122 | var iterationsPerSecond: CFTimeInterval = 1 123 | 124 | @Published private var absoluteTime: CGFloat = 0 125 | 126 | private let link = DisplayLink() 127 | 128 | deinit { 129 | stop() 130 | } 131 | 132 | func start() { 133 | link.start { [weak self] framesPerSecond in 134 | guard let self = self else { return } 135 | self.absoluteTime -= 1.0 / (framesPerSecond / self.iterationsPerSecond) 136 | } 137 | } 138 | 139 | func stop() { 140 | link.stop() 141 | } 142 | } 143 | 144 | } 145 | -------------------------------------------------------------------------------- /Sources/AntsInMyPants/ContentSizeObserver.swift: -------------------------------------------------------------------------------- 1 | import SwiftUI 2 | 3 | public struct ContentSizeObserver: View { 4 | @Binding public var size: CGSize? 5 | 6 | public var body: some View { 7 | GeometryReader { proxy in 8 | Color.clear.onAppear { 9 | update(proxy.size) 10 | } 11 | } 12 | } 13 | 14 | private func update(_ newSize: CGSize) { 15 | guard newSize != size else { return } 16 | size = newSize 17 | } 18 | } 19 | -------------------------------------------------------------------------------- /Sources/AntsInMyPants/DisplayLink.swift: -------------------------------------------------------------------------------- 1 | import SwiftUI 2 | 3 | public class DisplayLink: ObservableObject { 4 | private var tickHandler: (_ framesPerSecond: CFTimeInterval) -> Void = {_ in} 5 | private lazy var link = CADisplayLink(target: self, selector: #selector(tick)) 6 | 7 | deinit { 8 | stop() 9 | } 10 | 11 | public func start(tickHandler: @escaping (_ framesPerSecond: CFTimeInterval) -> Void) { 12 | self.tickHandler = tickHandler 13 | link.add(to: .main, forMode: .common) 14 | } 15 | 16 | public func stop() { 17 | link.invalidate() 18 | } 19 | 20 | @objc private func tick() { 21 | let actualFramesPerSecond = 1 / (link.targetTimestamp - link.timestamp) 22 | tickHandler(actualFramesPerSecond) 23 | } 24 | } 25 | -------------------------------------------------------------------------------- /Sources/AntsInMyPants/Radians.swift: -------------------------------------------------------------------------------- 1 | import SwiftUI 2 | 3 | typealias Radians = CGFloat 4 | 5 | extension Int { 6 | 7 | var radians: CGFloat { 8 | return CGFloat(self).radians 9 | } 10 | 11 | var radiansDouble: Double { 12 | return Double(self) * .pi / 180 13 | } 14 | 15 | } 16 | 17 | extension CGFloat { 18 | 19 | var radians: CGFloat { 20 | return self * .pi / 180 21 | } 22 | 23 | } 24 | -------------------------------------------------------------------------------- /tilt.gif: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/jaredsinclair/antsinmypants/d736a5d569bacc143f0f08eea8edc84e83e37e3e/tilt.gif --------------------------------------------------------------------------------