├── .github └── FUNDING.yml ├── .gitignore ├── LICENSE ├── Package.swift ├── README.md ├── SwiftColorWheel.xcodeproj ├── project.pbxproj ├── project.xcworkspace │ ├── contents.xcworkspacedata │ └── xcshareddata │ │ └── IDEWorkspaceChecks.plist └── xcshareddata │ └── xcschemes │ ├── SwiftColorWheel.xcscheme │ └── SwiftColorWheelExamples.xcscheme ├── SwiftColorWheel ├── ColorWheel.swift ├── ColorWheelLayer.swift ├── DefaultWheelGestureHandler.swift ├── Info.plist ├── RotatingColorWheel.swift └── SwiftColorWheel.h ├── SwiftColorWheelExamples ├── AppDelegate.swift ├── Assets.xcassets │ ├── AppIcon.appiconset │ │ ├── Contents.json │ │ ├── Icon-App-20x20@1x.png │ │ ├── Icon-App-20x20@2x-1.png │ │ ├── Icon-App-20x20@2x.png │ │ ├── Icon-App-20x20@3x.png │ │ ├── Icon-App-29x29@1x.png │ │ ├── Icon-App-29x29@2x-1.png │ │ ├── Icon-App-29x29@2x.png │ │ ├── Icon-App-29x29@3x.png │ │ ├── Icon-App-40x40@1x.png │ │ ├── Icon-App-40x40@2x-1.png │ │ ├── Icon-App-40x40@2x.png │ │ ├── Icon-App-40x40@3x.png │ │ ├── Icon-App-60x60@2x.png │ │ ├── Icon-App-60x60@3x.png │ │ ├── Icon-App-76x76@1x.png │ │ ├── Icon-App-76x76@2x.png │ │ ├── Icon-App-83.5x83.5@2x.png │ │ └── icon.png │ └── Contents.json ├── Base.lproj │ ├── LaunchScreen.storyboard │ └── Main.storyboard ├── Info.plist ├── ViewController.swift └── launchimage.png ├── appstore.svg ├── rotatingcolorwheel.gif ├── screenshot_1.png ├── screenshot_2.png ├── screenshot_3.png └── screenshot_4.png /.github/FUNDING.yml: -------------------------------------------------------------------------------- 1 | # These are supported funding model platforms 2 | 3 | github: [dmrschmidt] 4 | custom: ["https://www.buymeacoffee.com/dmrschmidt"] 5 | -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | # Adapted from https://github.com/github/gitignore/blob/master/Objective-C.gitignore 2 | 3 | # Finder 4 | .DS_Store 5 | 6 | # AppCode 7 | .idea 8 | 9 | # Xcode 10 | ## Build generated 11 | build/ 12 | DerivedData/ 13 | 14 | ## Various settings 15 | *.pbxuser 16 | !default.pbxuser 17 | *.mode1v3 18 | !default.mode1v3 19 | *.mode2v3 20 | !default.mode2v3 21 | *.perspectivev3 22 | !default.perspectivev3 23 | xcuserdata/ 24 | 25 | ## Other 26 | *.moved-aside 27 | *.xccheckout 28 | *.xcscmblueprint 29 | 30 | ## Obj-C/Swift specific 31 | *.hmap 32 | *.ipa 33 | *.dSYM.zip 34 | *.dSYM 35 | 36 | ## Playgrounds 37 | timeline.xctimeline 38 | playground.xcworkspace 39 | 40 | # Swift Package Manager 41 | # 42 | # Add this line if you want to avoid checking in source code from Swift Package Manager dependencies. 43 | # Packages/ 44 | # Package.pins 45 | .build/ 46 | 47 | # CocoaPods 48 | # 49 | # We recommend against adding the Pods directory to your .gitignore. 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We also recommend that a 185 | file or class name and description of purpose be included on the 186 | same "printed page" as the copyright notice for easier 187 | identification within third-party archives. 188 | 189 | Copyright [yyyy] [name of copyright owner] 190 | 191 | Licensed under the Apache License, Version 2.0 (the "License"); 192 | you may not use this file except in compliance with the License. 193 | You may obtain a copy of the License at 194 | 195 | http://www.apache.org/licenses/LICENSE-2.0 196 | 197 | Unless required by applicable law or agreed to in writing, software 198 | distributed under the License is distributed on an "AS IS" BASIS, 199 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 200 | See the License for the specific language governing permissions and 201 | limitations under the License. 202 | -------------------------------------------------------------------------------- /Package.swift: -------------------------------------------------------------------------------- 1 | // swift-tools-version:5.1 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: "SwiftColorWheel", 8 | platforms: [ 9 | .iOS(.v9), 10 | ], 11 | products: [ 12 | // Products define the executables and libraries a package produces, and make them visible to other packages. 13 | .library( 14 | name: "SwiftColorWheel", 15 | targets: ["SwiftColorWheel"]), 16 | ], 17 | dependencies: [ 18 | // Dependencies declare other packages that this package depends on. 19 | // .package(url: /* package url */, from: "1.0.0"), 20 | ], 21 | targets: [ 22 | // Targets are the basic building blocks of a package. A target can define a module or a test suite. 23 | // Targets can depend on other targets in this package, and on products in packages this package depends on. 24 | .target( 25 | name: "SwiftColorWheel", 26 | dependencies: [], 27 | path: "SwiftColorWheel"), 28 | ] 29 | ) 30 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # SwiftColorWheel 2 | 3 | [![Carthage compatible](https://img.shields.io/badge/Carthage-compatible-4BC51D.svg?style=flat)](https://github.com/Carthage/Carthage) 4 | [![Swift Package Manager compatible](https://img.shields.io/badge/spm-compatible-brightgreen.svg?style=flat)](https://swift.org/package-manager) 5 | 6 | A beautiful, customizable color wheel for iOS in Swift. 7 | 8 | ScreenshotRotating ScreenshotScreenshot 9 | 10 | 11 | # More related iOS Controls 12 | 13 | You may also find the following iOS controls written in Swift interesting: 14 | 15 | * [DSWaveformImage](https://github.com/dmrschmidt/DSWaveformImage) - draw an audio file's waveform image 16 | * [QRCode](https://github.com/dmrschmidt/QRCode) - a customizable QR code generator 17 | 18 | Also [check it out on CocoaControls](https://www.cocoacontrols.com/controls/swiftcolorwheel). 19 | 20 | If you really like this library (aka Sponsoring) 21 | ------------ 22 | I'm doing all this for fun and joy and because I strongly believe in the power of open source. On the off-chance though, that using my library has brought joy to you and you just feel like saying "thank you", I would smile like a 4-year old getting a huge ice cream cone, if you'd support my via one of the sponsoring buttons ☺️💕 23 | 24 | If you're feeling in the mood of sending someone else a lovely gesture of appreciation, maybe check out my iOS app [💌 SoundCard](https://www.soundcard.io) to send them a real postcard with a personal audio message. 25 | 26 | Buy Me A Coffee 27 | 28 | 29 | # Installation 30 | 31 | ## Swift Package Manager 32 | 33 | Just add `https://github.com/dmrschmidt/SwiftColorWheel` and select "Up to Next Major" 34 | 35 | ## Carthage 36 | 37 | Simply add the following to your Cartfile and run `carthage update`: 38 | 39 | ``` 40 | github "dmrschmidt/SwiftColorWheel", ~> 1.5 41 | ``` 42 | 43 | # Usage 44 | 45 | Either, add a `ColorWheel` or `RotatingColorWheel` as a custom `UIView` subclass to your interface builder. Alternatively, you can of course simply add it programmatically as a subview to any normal `UIView`. 46 | 47 | This will already render your color picker. However it doesn't react on your taps yet. For that, set yourself as it's `delegate`. See the very simplified code example below: 48 | 49 | ```swift 50 | class MyViewController: UIViewController, ColorWheelDelegate { 51 | private var colorWheel: ColorWheel! 52 | 53 | override func viewDidLoad() { 54 | super.viewDidLoad() 55 | 56 | colorWheel = ColorWheel(frame: view.frame) 57 | colorWheel.delegate = self 58 | view.addSubview(colorWheel) 59 | } 60 | 61 | // MARK: - ColorWheelDelegate 62 | 63 | func didSelect(color: UIColor) { 64 | view.backgroundColor = color 65 | } 66 | } 67 | ``` 68 | 69 | # Customization 70 | 71 | You can modify the look of the color wheel through various exposed properties. 72 | 73 | ```swift 74 | // Extra padding in points to the view border. 75 | colorWheel.padding = 13.0 76 | 77 | // Radius in point of the central color circle (for black & white shades). 78 | colorWheel.centerRadius = 5.0 79 | 80 | // Smallest circle radius in point. 81 | colorWheel.minCircleRadius = 1.0 82 | 83 | // Largest circle radius in point. 84 | colorWheel.maxCircleRadius = 5.0 85 | 86 | // Padding between circles in point. 87 | colorWheel.innerPadding = 3 88 | 89 | /** 90 | Degree by which each row of circles is shifted. 91 | A value of 0 results in a straight layout of the inner circles. 92 | A value other than 0 results in a slightly shifted, fractal-ish / flower-ish look. 93 | */ 94 | colorWheel.shiftDegree = 0 95 | 96 | // Overall density of inner circles. 97 | colorWheel.density = 1.0 98 | 99 | // Stroke color highlighting currently selected color. Set nil to disable highlighting. 100 | // Default is UIColor.white. 101 | colorWheel.highlightStrokeColor = nil 102 | ``` 103 | 104 | In some case (like when a `RotatingColorWheel` is placed inside a `UIScrollView`) you may want to tweak the default gesture handling for the rotation. If you do so, you can get access to the original gesture handler and use it in composition. 105 | 106 | ```swift 107 | let originalHandler = rotatingWheel.panRecognizer.delegate 108 | yourRetainedHandler = YourTweakedHandler(complementing: originalHandler) 109 | rotatingWheel.panRecognizer.delegate = yourRetainedHandler 110 | rotatingWheel.rotateRecognizer.delegate = yourRetainedHandler 111 | ``` 112 | 113 | `YourTweakedHandler` could then implement `gestureRecognizerShouldBegin(_:)` in conjunction with the originally provided handler. 114 | 115 | ## See it live in action 116 | 117 | [SoundCard - postcards with sound](https://www.soundcard.io) lets you send real, physical postcards with audio messages. Right from your iOS device. 118 | 119 | SwiftColorWheel is used to color the waveform derived from the audio message on postcards sent by [SoundCard - postcards with audio](https://www.soundcard.io). 120 | 121 |   122 | 123 |
124 | 125 | Download SoundCard 126 | 127 | Download SoundCard on the App Store. 128 | 129 |
130 | 131 |   132 | 133 | 134 | Screenshot 135 | 136 | -------------------------------------------------------------------------------- /SwiftColorWheel.xcodeproj/project.pbxproj: -------------------------------------------------------------------------------- 1 | // !$*UTF8*$! 2 | { 3 | archiveVersion = 1; 4 | classes = { 5 | }; 6 | objectVersion = 50; 7 | objects = { 8 | 9 | /* Begin PBXBuildFile section */ 10 | C32C9B24207433F500EE5634 /* SwiftColorWheel.h in Headers */ = {isa = PBXBuildFile; fileRef = C32C9B16207433F500EE5634 /* SwiftColorWheel.h */; settings = {ATTRIBUTES = (Public, ); }; }; 11 | C32C9B302074356100EE5634 /* ColorWheel.swift in Sources */ = {isa = PBXBuildFile; fileRef = C32C9B2D2074356000EE5634 /* ColorWheel.swift */; }; 12 | C32C9B312074356100EE5634 /* RotatingColorWheel.swift in Sources */ = {isa = PBXBuildFile; fileRef = C32C9B2E2074356000EE5634 /* RotatingColorWheel.swift */; }; 13 | C32C9B322074356100EE5634 /* ColorWheelLayer.swift in Sources */ = {isa = PBXBuildFile; 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534 | defaultConfigurationIsVisible = 0; 535 | defaultConfigurationName = Release; 536 | }; 537 | C32C9B462074358100EE5634 /* Build configuration list for PBXNativeTarget "SwiftColorWheelExamples" */ = { 538 | isa = XCConfigurationList; 539 | buildConfigurations = ( 540 | C32C9B472074358100EE5634 /* Debug */, 541 | C32C9B482074358100EE5634 /* Release */, 542 | ); 543 | defaultConfigurationIsVisible = 0; 544 | defaultConfigurationName = Release; 545 | }; 546 | /* End XCConfigurationList section */ 547 | }; 548 | rootObject = C32C9B0A207433F500EE5634 /* Project object */; 549 | } 550 | -------------------------------------------------------------------------------- /SwiftColorWheel.xcodeproj/project.xcworkspace/contents.xcworkspacedata: -------------------------------------------------------------------------------- 1 | 2 | 4 | 6 | 7 | 8 | -------------------------------------------------------------------------------- /SwiftColorWheel.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | IDEDidComputeMac32BitWarning 6 | 7 | 8 | 9 | -------------------------------------------------------------------------------- /SwiftColorWheel.xcodeproj/xcshareddata/xcschemes/SwiftColorWheel.xcscheme: -------------------------------------------------------------------------------- 1 | 2 | 5 | 8 | 9 | 15 | 21 | 22 | 23 | 24 | 25 | 30 | 31 | 37 | 38 | 39 | 40 | 42 | 48 | 49 | 50 | 51 | 52 | 62 | 63 | 69 | 70 | 71 | 72 | 78 | 79 | 85 | 86 | 87 | 88 | 90 | 91 | 94 | 95 | 96 | -------------------------------------------------------------------------------- /SwiftColorWheel.xcodeproj/xcshareddata/xcschemes/SwiftColorWheelExamples.xcscheme: -------------------------------------------------------------------------------- 1 | 2 | 5 | 8 | 9 | 15 | 21 | 22 | 23 | 24 | 25 | 30 | 31 | 37 | 38 | 39 | 40 | 41 | 42 | 52 | 54 | 60 | 61 | 62 | 63 | 69 | 71 | 77 | 78 | 79 | 80 | 82 | 83 | 86 | 87 | 88 | -------------------------------------------------------------------------------- /SwiftColorWheel/ColorWheel.swift: -------------------------------------------------------------------------------- 1 | import UIKit 2 | 3 | /** 4 | Delegate to the ColorWheel. 5 | */ 6 | public protocol ColorWheelDelegate: class { 7 | /** 8 | If a delegate is set, this method is invoked with the color closed to the 9 | user's tap location. 10 | */ 11 | func didSelect(color: UIColor) 12 | } 13 | 14 | /** 15 | Basic color wheel picker. 16 | This class draws a round, wheel-like color picker which can be tapped by the user. 17 | The interpolated color closed to the tap location is returned to its `ColorWheelDelegate`. 18 | */ 19 | public class ColorWheel: UIView { 20 | /// Delegate to inform when color is picked. 21 | public weak var delegate: ColorWheelDelegate? 22 | 23 | /// Overall color brightness. Animatable. 24 | @objc public dynamic var brightness: CGFloat { didSet { wheelLayer.brightness = brightness } } 25 | 26 | /// Extra padding in points to the view border. 27 | public var padding: CGFloat = 12.0 { didSet { setNeedsDisplay() } } 28 | 29 | /// Radius in point of the central color circle (for black & white shades). 30 | public var centerRadius: CGFloat = 4.0 { didSet { setNeedsDisplay() } } 31 | 32 | /// Smallest circle radius in point. 33 | public var minCircleRadius: CGFloat = 1.0 { didSet { setNeedsDisplay() } } 34 | 35 | /// Largest circle radius in point. 36 | public var maxCircleRadius: CGFloat = 6.0 { didSet { setNeedsDisplay() } } 37 | 38 | /// Padding between circles in point. 39 | public var innerPadding: CGFloat = 2 { didSet { setNeedsDisplay() } } 40 | 41 | /// Stroke color highlighting currently selected color. Set nil to disable highlighting. 42 | public var highlightStrokeColor: UIColor? = UIColor.white { didSet { setNeedsDisplay() } } 43 | 44 | /// Outer Radius of the ColorWheel in point. 45 | public var radius: CGFloat { 46 | return wheelLayer.radius(in: bounds) 47 | } 48 | 49 | /** 50 | Degree by which each row of circles is shifted. 51 | A value of 0 results in a straight layout of the inner circles. 52 | A value other than 0 results in a slightly shifted, fractal-ish / flower-ish look. 53 | */ 54 | public var shiftDegree: CGFloat = 40 { didSet { setNeedsDisplay() } } 55 | 56 | /// Overall density of inner circles. 57 | public var density: CGFloat = 0.8 { didSet { setNeedsDisplay() } } 58 | 59 | private let normalizedRadius: CGFloat = 1.0 60 | 61 | fileprivate var wheelLayer: ColorWheelLayer! { 62 | return layer as? ColorWheelLayer 63 | } 64 | 65 | private var tapRecognizer: UITapGestureRecognizer! 66 | 67 | public required init?(coder aDecoder: NSCoder) { 68 | brightness = 1.0 69 | super.init(coder: aDecoder) 70 | 71 | layer.contentsScale = UIScreen.main.scale 72 | prepareTapRecognizer() 73 | contentMode = .redraw 74 | } 75 | 76 | public override init(frame: CGRect) { 77 | brightness = 1.0 78 | super.init(frame: frame) 79 | 80 | layer.contentsScale = UIScreen.main.scale 81 | prepareTapRecognizer() 82 | contentMode = .redraw 83 | } 84 | 85 | override public class var layerClass: AnyClass { 86 | return ColorWheelLayer.self 87 | } 88 | 89 | // taken from: https://stackoverflow.com/questions/14192816/create-a-custom-animatable-property/44961463#44961463 90 | // backgroundColor is simply a "placeholder" to get the UIView.animate() properties 91 | override public func action(for layer: CALayer, forKey event: String) -> CAAction? { 92 | if event == #keyPath(ColorWheelLayer.brightness), 93 | let action = action(for: layer, forKey: #keyPath(backgroundColor)) as? CAAnimation { 94 | 95 | let animation = CABasicAnimation() 96 | animation.keyPath = #keyPath(ColorWheelLayer.brightness) 97 | animation.fromValue = wheelLayer.brightness 98 | animation.toValue = brightness 99 | animation.beginTime = action.beginTime 100 | animation.duration = action.duration 101 | animation.speed = action.speed 102 | animation.timeOffset = action.timeOffset 103 | animation.repeatCount = action.repeatCount 104 | animation.repeatDuration = action.repeatDuration 105 | animation.autoreverses = action.autoreverses 106 | animation.fillMode = action.fillMode 107 | animation.timingFunction = action.timingFunction 108 | animation.delegate = action.delegate 109 | self.layer.add(animation, forKey: #keyPath(ColorWheelLayer.brightness)) 110 | } 111 | return super.action(for: layer, forKey: event) 112 | } 113 | 114 | /** 115 | Distance from given point to center, normalized to the ColorWheel radius. 116 | 0: directly on center 117 | 1: directly on radius 118 | `to` is assumed to be in ColorWheel coordinates. 119 | */ 120 | public func normalizedDistanceFromCenter(to touchPoint: CGPoint) -> CGFloat { 121 | let distance = sqrt(pow(touchPoint.x - wheelCenter.x, 2) + pow(touchPoint.y - wheelCenter.y, 2)) 122 | return distance / radius 123 | } 124 | 125 | @objc func didRegisterTap(recognizer: UITapGestureRecognizer) { 126 | let touchPoint = recognizer.location(in: self) 127 | let distance = normalizedDistanceFromCenter(to: touchPoint) 128 | guard distance <= normalizedRadius else { return } 129 | 130 | let angle = adjustedAngleTo(center: wheelCenter, pointOnCircle: touchPoint, distance: distance) 131 | let tappedColor = wheelLayer.color(at: angle, shiftedBy: shiftDegree, distance: distance) 132 | wheelLayer.lastTouchPoint = touchPoint 133 | delegate?.didSelect(color: tappedColor) 134 | } 135 | 136 | func removeHighlightCircle() { 137 | wheelLayer.lastTouchPoint = nil 138 | } 139 | 140 | func angleTo(center: CGPoint, pointOnCircle: CGPoint) -> CGFloat { 141 | let originX = pointOnCircle.x - center.x 142 | let originY = pointOnCircle.y - center.y 143 | return atan2(originY, originX) 144 | } 145 | 146 | func adjustedAngleTo(center: CGPoint, pointOnCircle: CGPoint, distance: CGFloat) -> CGFloat { 147 | var radians = angleTo(center: center, pointOnCircle: pointOnCircle) 148 | while radians < 0 { radians += CGFloat(2 * Double.pi) } 149 | let counterClockwise = 2 * .pi - (radians + (shiftDegree * distance) / 180 * .pi) 150 | return counterClockwise 151 | } 152 | 153 | var wheelCenter: CGPoint { 154 | return CGPoint(x: bounds.size.width / 2, y: bounds.size.height / 2) 155 | } 156 | 157 | func prepareTapRecognizer() { 158 | tapRecognizer = UITapGestureRecognizer() 159 | tapRecognizer.numberOfTouchesRequired = 1 160 | addGestureRecognizer(tapRecognizer) 161 | tapRecognizer.addTarget(self, action: #selector(didRegisterTap(recognizer:))) 162 | } 163 | } 164 | -------------------------------------------------------------------------------- /SwiftColorWheel/ColorWheelLayer.swift: -------------------------------------------------------------------------------- 1 | import UIKit 2 | 3 | class ColorWheelLayer: CALayer { 4 | @NSManaged var brightness: CGFloat 5 | 6 | var lastTouchPoint: CGPoint? { 7 | didSet { 8 | setNeedsDisplay() 9 | } 10 | } 11 | 12 | // swiftlint:disable force_cast 13 | private var padding: CGFloat { return (delegate as! ColorWheel).padding } 14 | private var centerRadius: CGFloat { return (delegate as! ColorWheel).centerRadius } 15 | private var minCircleRadius: CGFloat { return (delegate as! ColorWheel).minCircleRadius } 16 | private var maxCircleRadius: CGFloat { return (delegate as! ColorWheel).maxCircleRadius } 17 | private var innerPadding: CGFloat { return (delegate as! ColorWheel).innerPadding } 18 | private var shiftDegree: CGFloat { return (delegate as! ColorWheel).shiftDegree } 19 | private var density: CGFloat { return (delegate as! ColorWheel).density } 20 | private var highlightStrokeColor: UIColor? { return (delegate as! ColorWheel).highlightStrokeColor } 21 | // swiftlint:enable force_cast 22 | 23 | private let defaultBrightness: CGFloat = 1.0 24 | 25 | override init(layer: Any) { 26 | super.init(layer: layer) 27 | brightness = (layer as? ColorWheelLayer)?.brightness ?? 1.0 28 | } 29 | 30 | override init() { 31 | super.init() 32 | brightness = defaultBrightness 33 | } 34 | 35 | required init(coder decoder: NSCoder) { 36 | super.init(coder: decoder)! 37 | } 38 | 39 | override class func needsDisplay(forKey key: String) -> Bool { 40 | if key == #keyPath(brightness) { 41 | return true 42 | } 43 | return super.needsDisplay(forKey: key) 44 | } 45 | 46 | override func draw(in context: CGContext) { 47 | super.draw(in: context) 48 | UIGraphicsPushContext(context) 49 | 50 | let outerRadius = radius(in: bounds) 51 | var innerRadius = outerRadius 52 | var prevDotRadius = dotRadius(distance: 1) 53 | var currentDotRadius: CGFloat 54 | let center = CGPoint(x: bounds.size.width / 2, y: bounds.size.height / 2) 55 | 56 | repeat { 57 | let distance = innerRadius / outerRadius 58 | currentDotRadius = dotRadius(distance: distance) 59 | 60 | arcPositions(dotRadius: currentDotRadius, on: innerRadius).forEach { rad in 61 | drawPickerCircle(in: context, around: center, on: outerRadius, rad: rad, distance: distance) 62 | } 63 | innerRadius -= (prevDotRadius + 2 * currentDotRadius + innerPadding) 64 | prevDotRadius = currentDotRadius 65 | } while innerRadius > 2 * centerRadius + currentDotRadius 66 | 67 | drawPickerCircle(in: context, around: center, on: outerRadius, rad: 0, distance: 0) 68 | drawHighlightCircle(in: context, around: center, on: outerRadius) 69 | 70 | UIGraphicsPopContext() 71 | } 72 | 73 | func radius(in rect: CGRect) -> CGFloat { 74 | return min(rect.size.width, rect.size.height) / 2 - padding 75 | } 76 | 77 | func color(at rad: CGFloat, shiftedBy shiftDegree: CGFloat, distance: CGFloat) -> UIColor { 78 | let shiftedRad = rad + (shiftDegree * distance) / 180 * .pi 79 | return UIColor(hue: shiftedRad / (2 * .pi), saturation: distance, brightness: brightness, alpha: 1) 80 | } 81 | } 82 | 83 | fileprivate extension ColorWheelLayer { 84 | func arcPositions(dotRadius: CGFloat, on radius: CGFloat) -> [CGFloat] { 85 | let circlesFitting = (2 * dotRadius) > radius 86 | ? 1 87 | : max(1, Int((density * .pi / (asin((2 * dotRadius) / radius))))) 88 | let stepSize = 2 * .pi / CGFloat(circlesFitting - 1) 89 | return (0.. CGRect { 127 | CGRect(x: center.x - radius, y: center.y - radius, width: radius * modifier, height: radius * modifier) 128 | } 129 | 130 | func dotRadius(distance: CGFloat) -> CGFloat { 131 | guard distance > 0 else { return centerRadius } 132 | return max(minCircleRadius, maxCircleRadius * distance) 133 | } 134 | 135 | func position(around center: CGPoint, shiftedBy shiftDegree: CGFloat, on radius: CGFloat, rad: CGFloat, distance: CGFloat) -> CGPoint { 136 | let shiftedRad = rad + (shiftDegree * distance) / 180 * .pi 137 | let x = center.x + (radius - padding) * distance * cos(-shiftedRad) 138 | let y = center.y + (radius - padding) * distance * sin(-shiftedRad) 139 | return CGPoint(x: x, y: y) 140 | } 141 | } 142 | -------------------------------------------------------------------------------- /SwiftColorWheel/DefaultWheelGestureHandler.swift: -------------------------------------------------------------------------------- 1 | import Foundation 2 | import UIKit 3 | 4 | class DefaultWheelGestureHandler: NSObject, UIGestureRecognizerDelegate { 5 | weak var colorWheel: RotatingColorWheel? 6 | 7 | func gestureRecognizerShouldBegin(_ gestureRecognizer: UIGestureRecognizer) -> Bool { 8 | guard let colorWheel = colorWheel else { return false } 9 | 10 | switch gestureRecognizer { 11 | case colorWheel.panRecognizer: return handlePanGesture(colorWheel.panRecognizer) 12 | case colorWheel.rotateRecognizer: return handleRotateGesture(colorWheel.rotateRecognizer) 13 | default: return true // any other recognizer should deal with animation etc. itself 14 | } 15 | } 16 | 17 | private func handlePanGesture(_ gestureRecognizer: UIPanGestureRecognizer) -> Bool { 18 | guard let colorWheel = colorWheel else { return true } 19 | 20 | colorWheel.removeHighlightCircle() 21 | 22 | // since the view is rotated, the coordinates are also "rotated" 23 | let rotatedTouchPoint = gestureRecognizer.location(in: colorWheel) 24 | let distance = colorWheel.normalizedDistanceFromCenter(to: rotatedTouchPoint) 25 | let isWithinRadius = distance <= 1.0 26 | 27 | return isWithinRadius && !colorWheel.isAnimating 28 | } 29 | 30 | private func handleRotateGesture(_ gestureRecognizer: UIRotationGestureRecognizer) -> Bool { 31 | guard let colorWheel = colorWheel else { return true } 32 | 33 | colorWheel.removeHighlightCircle() 34 | 35 | // since the view is rotated, the coordinates are also "rotated" 36 | let rotatedTouchPointA = gestureRecognizer.location(ofTouch: 0, in: colorWheel) 37 | let rotatedTouchPointB = gestureRecognizer.location(ofTouch: 1, in: colorWheel) 38 | let distanceA = colorWheel.normalizedDistanceFromCenter(to: rotatedTouchPointA) 39 | let distanceB = colorWheel.normalizedDistanceFromCenter(to: rotatedTouchPointB) 40 | let areWithinRadius = distanceA <= 1.0 && distanceB <= 1.0 41 | 42 | return areWithinRadius && !colorWheel.isAnimating 43 | } 44 | } 45 | -------------------------------------------------------------------------------- /SwiftColorWheel/Info.plist: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | CFBundleDevelopmentRegion 6 | $(DEVELOPMENT_LANGUAGE) 7 | CFBundleExecutable 8 | $(EXECUTABLE_NAME) 9 | CFBundleIdentifier 10 | $(PRODUCT_BUNDLE_IDENTIFIER) 11 | CFBundleInfoDictionaryVersion 12 | 6.0 13 | CFBundleName 14 | $(PRODUCT_NAME) 15 | CFBundlePackageType 16 | FMWK 17 | CFBundleShortVersionString 18 | $(MARKETING_VERSION) 19 | CFBundleVersion 20 | $(CURRENT_PROJECT_VERSION) 21 | NSPrincipalClass 22 | 23 | 24 | 25 | -------------------------------------------------------------------------------- /SwiftColorWheel/RotatingColorWheel.swift: -------------------------------------------------------------------------------- 1 | import UIKit 2 | 3 | enum RotationDirection: CGFloat { 4 | case none = 0 5 | case clockwise = 1 6 | case counterClockwise = -1 7 | } 8 | 9 | /** 10 | Rotatable color wheel picker. 11 | This is a subclass of `ColorWheel`. It adds two `UIGestureRecognizeras` to itself. 12 | Those allow one-finger and two-finger circular rotation to adjust the overall 13 | brightness of the colors. 14 | */ 15 | public class RotatingColorWheel: ColorWheel, CAAnimationDelegate { 16 | public private(set) var panRecognizer: UIPanGestureRecognizer! 17 | public private(set) var rotateRecognizer: UIRotationGestureRecognizer! 18 | 19 | private let defaultGestureHandler: DefaultWheelGestureHandler 20 | 21 | private var rotationArch: CGFloat = 2 * .pi 22 | private var lastDirection: RotationDirection = .none 23 | private var lastAngle: CGFloat = 2 * .pi 24 | private var angleDeltas: [CGFloat] = [0, 0, 0] 25 | private var timeDeltas: [TimeInterval] = [0, 0, 0] 26 | private let maxRotationSpeed: CGFloat = 0.7 27 | private let minimumSpeedThreshold: CGFloat = 0.06 28 | private let rotationAnimationDuration = 0.5 29 | 30 | public required init?(coder aDecoder: NSCoder) { 31 | defaultGestureHandler = DefaultWheelGestureHandler() 32 | super.init(coder: aDecoder) 33 | prepareRotationRecognizers() 34 | } 35 | 36 | public override init(frame: CGRect) { 37 | defaultGestureHandler = DefaultWheelGestureHandler() 38 | super.init(frame: frame) 39 | prepareRotationRecognizers() 40 | } 41 | 42 | public var isAnimating: Bool { 43 | return layer.animationKeys()?.isEmpty ?? false 44 | } 45 | 46 | @objc func didRotate(recognizer: UIRotationGestureRecognizer) { 47 | let newRotationArch = rotationArch + recognizer.rotation 48 | if recognizer.state == .changed { 49 | rotate(to: dampened(rotation: newRotationArch)) 50 | } else if recognizer.state == .ended { 51 | rotationArch = newRotationArch 52 | continueAnimationMotionOrSnapBackIfOutOfRange(velocity: recognizer.velocity) 53 | } else if recognizer.state == .cancelled { 54 | continueAnimationMotionOrSnapBackIfOutOfRange(velocity: recognizer.velocity) 55 | } 56 | } 57 | 58 | func angleDelta(_ newAngle: CGFloat, _ oldAngle: CGFloat) -> CGFloat { 59 | return abs((abs(newAngle) - abs(oldAngle))) * movementDirection(newAngle, oldAngle).rawValue 60 | } 61 | 62 | func movementDirection(_ newAngle: CGFloat, _ oldAngle: CGFloat) -> RotationDirection { 63 | if newAngle < 0 && oldAngle > 0 && abs(newAngle) > .pi / 2 { 64 | return .clockwise 65 | } else if newAngle > 0 && oldAngle < 0 && abs(newAngle) > .pi / 2 { 66 | return .counterClockwise 67 | } else if newAngle > oldAngle { 68 | return .clockwise 69 | } else { 70 | return .counterClockwise 71 | } 72 | } 73 | 74 | func dampened(rotation: CGFloat) -> CGFloat { 75 | if rotation < 0 { 76 | let minValue: CGFloat = -(.pi) 77 | let undampenedDelta = max(minValue, rotation) 78 | let progress = abs(undampenedDelta / .pi) 79 | let dampenedProgress = sin(sqrt(progress) * (.pi / 2)) 80 | return dampenedProgress * (-(.pi / 8)) 81 | } else if rotation > 2 * .pi { 82 | let maxValue: CGFloat = 2 * .pi + .pi 83 | let undampenedDelta = min(maxValue, rotation) - 2 * .pi 84 | let progress = undampenedDelta / .pi 85 | let dampenedProgress = sin(sqrt(progress) * (.pi / 2)) 86 | return 2 * .pi + dampenedProgress * (.pi / 8) 87 | } 88 | return rotation 89 | } 90 | 91 | @objc func didPan(recognizer: UIPanGestureRecognizer) { 92 | let touchPoint = recognizer.location(in: superview!) 93 | let center = convert(wheelCenter, to: superview!) 94 | let angle = angleTo(center: center, pointOnCircle: touchPoint) 95 | 96 | let newRotationArch = rotationArch + angleDelta(angle, lastAngle) 97 | trackAngleTravelled(delta: angleDelta(angle, lastAngle)) 98 | if recognizer.state == .began { 99 | angleDeltas = [0, 0, 0] 100 | timeDeltas = [0, 0, 0] 101 | lastAngle = angle 102 | } else if recognizer.state == .changed { 103 | rotate(to: dampened(rotation: newRotationArch)) 104 | lastDirection = movementDirection(angle, lastAngle) 105 | lastAngle = angle 106 | rotationArch = newRotationArch 107 | } else if recognizer.state == .ended { 108 | rotationArch = newRotationArch 109 | continueAnimationMotionOrSnapBackIfOutOfRange(velocity: radialSpeed(direction: lastDirection)) 110 | } else if recognizer.state == .cancelled { 111 | continueAnimationMotionOrSnapBackIfOutOfRange(velocity: radialSpeed(direction: lastDirection)) 112 | } 113 | } 114 | 115 | func trackAngleTravelled(delta: CGFloat) { 116 | angleDeltas.append(abs(delta)) 117 | timeDeltas.append(Date().timeIntervalSince1970) 118 | angleDeltas.remove(at: 0) 119 | timeDeltas.remove(at: 0) 120 | } 121 | 122 | func radialSpeed(direction: RotationDirection) -> CGFloat { 123 | let distance: CGFloat = abs(angleDeltas.reduce(0, +)) 124 | let timeDelta: CGFloat = CGFloat(timeDeltas.last! - timeDeltas.first!) * 10 125 | return min(maxRotationSpeed, distance / timeDelta) * direction.rawValue 126 | } 127 | 128 | func isOutOfSpinRange() -> Bool { 129 | return rotationArch < 0 || rotationArch > 2 * .pi 130 | } 131 | 132 | func continueAnimationMotionOrSnapBackIfOutOfRange(velocity: CGFloat) { 133 | if isOutOfSpinRange() { 134 | animateSpinBackMotion() 135 | } else if abs(velocity) > minimumSpeedThreshold { 136 | let deceleration: CGFloat = 0.1 // rad/s^2 137 | var distance = pow(velocity, 2) / (2 * deceleration) 138 | while distance >= .pi { distance -= .pi / 8 } 139 | let targetRotationArch = min(2 * .pi, max(0, rotationArch + distance * (velocity > 0 ? 1 : -1))) 140 | let targetRotationTransform = CATransform3DRotate(CATransform3DIdentity, targetRotationArch, 0, 0, 1) 141 | let targetBrightness = targetRotationArch / (2 * .pi) 142 | 143 | UIView.animate(withDuration: rotationAnimationDuration, delay: 0, options: .curveEaseOut, animations: { 144 | self.brightness = targetBrightness 145 | self.layer.transform = targetRotationTransform 146 | }) 147 | 148 | brightness = targetBrightness 149 | rotationArch = targetRotationArch 150 | } 151 | } 152 | 153 | private func prepareRotationRecognizers() { 154 | defaultGestureHandler.colorWheel = self 155 | rotateRecognizer = UIRotationGestureRecognizer(target: self, action: #selector(didRotate(recognizer:))) 156 | panRecognizer = UIPanGestureRecognizer(target: self, action: #selector(didPan(recognizer:))) 157 | rotateRecognizer.delegate = defaultGestureHandler 158 | panRecognizer.delegate = defaultGestureHandler 159 | addGestureRecognizer(rotateRecognizer) 160 | addGestureRecognizer(panRecognizer) 161 | } 162 | } 163 | 164 | // MARK: - CAAnimationDelegate 165 | 166 | extension RotatingColorWheel { 167 | public func animationDidStop(_ anim: CAAnimation, finished flag: Bool) { 168 | if isOutOfSpinRange() { 169 | animateSpinBackMotion() 170 | } 171 | } 172 | } 173 | 174 | // MARK: - Private 175 | 176 | fileprivate extension RotatingColorWheel { 177 | func animateSpinBackMotion() { 178 | let targetRotationArch: CGFloat = rotationArch < 0 ? 0 : 2 * .pi 179 | let spring = CASpringAnimation(keyPath: "transform") 180 | spring.damping = 20 181 | spring.stiffness = 1000 182 | spring.fromValue = NSValue(caTransform3D: layer.transform) 183 | // probably CATransform3DIdentity is enough here, but does it result in the same layer.transform? 184 | spring.toValue = NSValue(caTransform3D: CATransform3DRotate(CATransform3DIdentity, targetRotationArch, 0, 0, 1)) 185 | spring.duration = spring.settlingDuration 186 | layer.transform = CATransform3DRotate(CATransform3DIdentity, targetRotationArch, 0, 0, 1) 187 | layer.add(spring, forKey: "transformAnimation") 188 | rotationArch = targetRotationArch 189 | brightness = targetRotationArch / (2 * .pi) 190 | } 191 | 192 | func rotate(to radians: CGFloat) { 193 | transform = CGAffineTransform(rotationAngle: radians) 194 | let mappedBrightness = radians / (2 * .pi) 195 | guard mappedBrightness >= 0 && mappedBrightness <= 1.0 else { return } 196 | brightness = mappedBrightness 197 | } 198 | } 199 | -------------------------------------------------------------------------------- /SwiftColorWheel/SwiftColorWheel.h: -------------------------------------------------------------------------------- 1 | // 2 | // SwiftColorWheel.h 3 | // SwiftColorWheel 4 | // 5 | // Created by Dennis Schmidt on 03.04.18. 6 | // Copyright © 2018 Dennis Schmidt. All rights reserved. 7 | // 8 | 9 | #import 10 | 11 | //! Project version number for SwiftColorWheel. 12 | FOUNDATION_EXPORT double SwiftColorWheelVersionNumber; 13 | 14 | //! Project version string for SwiftColorWheel. 15 | FOUNDATION_EXPORT const unsigned char SwiftColorWheelVersionString[]; 16 | 17 | // In this header, you should import all the public headers of your framework using statements like #import 18 | 19 | 20 | -------------------------------------------------------------------------------- /SwiftColorWheelExamples/AppDelegate.swift: -------------------------------------------------------------------------------- 1 | // 2 | // AppDelegate.swift 3 | // SwiftColorWheelExamples 4 | // 5 | // Created by Dennis Schmidt on 03.04.18. 6 | // Copyright © 2018 Dennis Schmidt. All rights reserved. 7 | // 8 | 9 | import UIKit 10 | 11 | @UIApplicationMain 12 | class AppDelegate: UIResponder, UIApplicationDelegate { 13 | 14 | var window: UIWindow? 15 | 16 | 17 | func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool { 18 | // Override point for customization after application launch. 19 | return true 20 | } 21 | 22 | func applicationWillResignActive(_ application: UIApplication) { 23 | // Sent when the application is about to move from active to inactive state. This can occur for certain types of temporary interruptions (such as an incoming phone call or SMS message) or when the user quits the application and it begins the transition to the background state. 24 | // Use this method to pause ongoing tasks, disable timers, and invalidate graphics rendering callbacks. Games should use this method to pause the game. 25 | } 26 | 27 | func applicationDidEnterBackground(_ application: UIApplication) { 28 | // Use this method to release shared resources, save user data, invalidate timers, and store enough application state information to restore your application to its current state in case it is terminated later. 29 | // If your application supports background execution, this method is called instead of applicationWillTerminate: when the user quits. 30 | } 31 | 32 | func applicationWillEnterForeground(_ application: UIApplication) { 33 | // Called as part of the transition from the background to the active state; here you can undo many of the changes made on entering the background. 34 | } 35 | 36 | func applicationDidBecomeActive(_ application: UIApplication) { 37 | // Restart any tasks that were paused (or not yet started) while the application was inactive. If the application was previously in the background, optionally refresh the user interface. 38 | } 39 | 40 | func applicationWillTerminate(_ application: UIApplication) { 41 | // Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:. 42 | } 43 | 44 | 45 | } 46 | 47 | -------------------------------------------------------------------------------- /SwiftColorWheelExamples/Assets.xcassets/AppIcon.appiconset/Contents.json: -------------------------------------------------------------------------------- 1 | { 2 | "images" : [ 3 | { 4 | "size" : "20x20", 5 | "idiom" : "iphone", 6 | "filename" : "Icon-App-20x20@2x.png", 7 | "scale" : "2x" 8 | }, 9 | { 10 | "size" : "20x20", 11 | "idiom" : "iphone", 12 | "filename" : "Icon-App-20x20@3x.png", 13 | "scale" : "3x" 14 | }, 15 | { 16 | "size" : "29x29", 17 | "idiom" : "iphone", 18 | "filename" : "Icon-App-29x29@2x.png", 19 | "scale" : "2x" 20 | }, 21 | { 22 | "size" : "29x29", 23 | "idiom" : "iphone", 24 | "filename" : "Icon-App-29x29@3x.png", 25 | "scale" : "3x" 26 | }, 27 | { 28 | "size" : "40x40", 29 | "idiom" : "iphone", 30 | "filename" : "Icon-App-40x40@2x.png", 31 | "scale" : "2x" 32 | }, 33 | { 34 | "size" : "40x40", 35 | "idiom" : "iphone", 36 | "filename" : "Icon-App-40x40@3x.png", 37 | "scale" : "3x" 38 | }, 39 | { 40 | "size" : "60x60", 41 | "idiom" : "iphone", 42 | "filename" : "Icon-App-60x60@2x.png", 43 | "scale" : "2x" 44 | }, 45 | { 46 | "size" : "60x60", 47 | "idiom" : "iphone", 48 | "filename" : "Icon-App-60x60@3x.png", 49 | "scale" : "3x" 50 | }, 51 | { 52 | "size" : "20x20", 53 | "idiom" : "ipad", 54 | "filename" : "Icon-App-20x20@1x.png", 55 | "scale" : "1x" 56 | }, 57 | { 58 | "size" : "20x20", 59 | "idiom" : "ipad", 60 | "filename" : "Icon-App-20x20@2x-1.png", 61 | "scale" : "2x" 62 | }, 63 | { 64 | "size" : "29x29", 65 | "idiom" : "ipad", 66 | "filename" : "Icon-App-29x29@1x.png", 67 | "scale" : "1x" 68 | }, 69 | { 70 | "size" : "29x29", 71 | "idiom" : "ipad", 72 | "filename" : "Icon-App-29x29@2x-1.png", 73 | "scale" : "2x" 74 | }, 75 | { 76 | "size" : "40x40", 77 | "idiom" : "ipad", 78 | "filename" : "Icon-App-40x40@1x.png", 79 | "scale" : "1x" 80 | }, 81 | { 82 | "size" : "40x40", 83 | "idiom" : "ipad", 84 | "filename" : "Icon-App-40x40@2x-1.png", 85 | "scale" : "2x" 86 | }, 87 | { 88 | "size" : "76x76", 89 | "idiom" : "ipad", 90 | "filename" : "Icon-App-76x76@1x.png", 91 | "scale" : "1x" 92 | }, 93 | { 94 | "size" : "76x76", 95 | "idiom" : "ipad", 96 | "filename" : "Icon-App-76x76@2x.png", 97 | "scale" : "2x" 98 | }, 99 | { 100 | "size" : "83.5x83.5", 101 | "idiom" : "ipad", 102 | "filename" : "Icon-App-83.5x83.5@2x.png", 103 | "scale" : "2x" 104 | }, 105 | { 106 | "size" : "1024x1024", 107 | "idiom" : "ios-marketing", 108 | "filename" : "icon.png", 109 | "scale" : "1x" 110 | } 111 | ], 112 | "info" : { 113 | "version" : 1, 114 | "author" : "xcode" 115 | } 116 | } -------------------------------------------------------------------------------- /SwiftColorWheelExamples/Assets.xcassets/AppIcon.appiconset/Icon-App-20x20@1x.png: -------------------------------------------------------------------------------- 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/SwiftColorWheelExamples/Base.lproj/LaunchScreen.storyboard: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 | 41 | 42 | 43 | 44 | 45 | 46 | 47 | -------------------------------------------------------------------------------- /SwiftColorWheelExamples/Base.lproj/Main.storyboard: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 | 41 | 47 | 48 | 49 | 50 | 51 | 52 | 53 | 54 | 55 | 56 | 57 | 58 | 59 | 60 | 61 | 62 | 63 | 64 | 65 | 66 | 67 | 68 | 69 | 70 | -------------------------------------------------------------------------------- /SwiftColorWheelExamples/Info.plist: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | CFBundleDevelopmentRegion 6 | $(DEVELOPMENT_LANGUAGE) 7 | CFBundleExecutable 8 | $(EXECUTABLE_NAME) 9 | CFBundleIdentifier 10 | $(PRODUCT_BUNDLE_IDENTIFIER) 11 | CFBundleInfoDictionaryVersion 12 | 6.0 13 | CFBundleName 14 | $(PRODUCT_NAME) 15 | CFBundlePackageType 16 | APPL 17 | CFBundleShortVersionString 18 | 1.0 19 | CFBundleVersion 20 | 2 21 | LSRequiresIPhoneOS 22 | 23 | UILaunchStoryboardName 24 | LaunchScreen 25 | UIMainStoryboardFile 26 | Main 27 | UIRequiredDeviceCapabilities 28 | 29 | armv7 30 | 31 | UISupportedInterfaceOrientations 32 | 33 | UIInterfaceOrientationPortrait 34 | UIInterfaceOrientationLandscapeLeft 35 | UIInterfaceOrientationLandscapeRight 36 | 37 | UISupportedInterfaceOrientations~ipad 38 | 39 | UIInterfaceOrientationPortrait 40 | UIInterfaceOrientationPortraitUpsideDown 41 | UIInterfaceOrientationLandscapeLeft 42 | UIInterfaceOrientationLandscapeRight 43 | 44 | 45 | 46 | -------------------------------------------------------------------------------- /SwiftColorWheelExamples/ViewController.swift: -------------------------------------------------------------------------------- 1 | // 2 | // ViewController.swift 3 | // SwiftrotatingWheelExamples 4 | // 5 | // Created by Dennis Schmidt on 03.04.18. 6 | // Copyright © 2018 Dennis Schmidt. All rights reserved. 7 | // 8 | 9 | import UIKit 10 | import SwiftColorWheel 11 | 12 | class ViewController: UIViewController { 13 | @IBOutlet weak var standardWheel: ColorWheel! 14 | @IBOutlet weak var rotatingWheel: RotatingColorWheel! 15 | 16 | override func viewDidLoad() { 17 | super.viewDidLoad() 18 | 19 | standardWheel.delegate = self 20 | rotatingWheel.delegate = self 21 | 22 | standardWheel.padding = 13.0 23 | standardWheel.centerRadius = 5.0 24 | standardWheel.minCircleRadius = 1.0 25 | standardWheel.maxCircleRadius = 5.0 26 | standardWheel.innerPadding = 3 27 | standardWheel.shiftDegree = 0 28 | standardWheel.density = 1.0 29 | standardWheel.highlightStrokeColor = nil 30 | } 31 | } 32 | 33 | extension ViewController: ColorWheelDelegate { 34 | func didSelect(color: UIColor) { 35 | view.backgroundColor = color 36 | } 37 | } 38 | -------------------------------------------------------------------------------- /SwiftColorWheelExamples/launchimage.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/dmrschmidt/SwiftColorWheel/482e004e85009c9d40454035a324834740efb0f6/SwiftColorWheelExamples/launchimage.png -------------------------------------------------------------------------------- /appstore.svg: -------------------------------------------------------------------------------- 1 | 2 | Download_on_the_App_Store_Badge_US-UK_RGB_blk_4SVG_092917 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 | 41 | 42 | 43 | 44 | 45 | 46 | 47 | -------------------------------------------------------------------------------- /rotatingcolorwheel.gif: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/dmrschmidt/SwiftColorWheel/482e004e85009c9d40454035a324834740efb0f6/rotatingcolorwheel.gif -------------------------------------------------------------------------------- /screenshot_1.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/dmrschmidt/SwiftColorWheel/482e004e85009c9d40454035a324834740efb0f6/screenshot_1.png -------------------------------------------------------------------------------- /screenshot_2.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/dmrschmidt/SwiftColorWheel/482e004e85009c9d40454035a324834740efb0f6/screenshot_2.png -------------------------------------------------------------------------------- /screenshot_3.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/dmrschmidt/SwiftColorWheel/482e004e85009c9d40454035a324834740efb0f6/screenshot_3.png -------------------------------------------------------------------------------- /screenshot_4.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/dmrschmidt/SwiftColorWheel/482e004e85009c9d40454035a324834740efb0f6/screenshot_4.png --------------------------------------------------------------------------------