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feat: added SkeletonAnimationBuilder to create layer animations
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,85 @@ | ||
| // | ||
| // SkeletonAnimationBuilder.swift | ||
| // SkeletonView-iOS | ||
| // | ||
| // Created by Juanpe Catalán on 17/11/2017. | ||
| // Copyright © 2017 SkeletonView. All rights reserved. | ||
| // | ||
|
|
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| import UIKit | ||
|
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| typealias GradientAnimationPoint = (from: CGPoint, to: CGPoint) | ||
|
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| public enum GradientDirection { | ||
| case leftRight | ||
| case rightLeft | ||
| case topBottom | ||
| case bottomTop | ||
| case topLeftBottomRight | ||
| case bottomRightTopLeft | ||
|
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| public var slidingAnimation: SkeletonLayerAnimation { | ||
| return SkeletonAnimationBuilder().makeSlidingAnimation(with: self) | ||
| } | ||
|
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| var startPoint: GradientAnimationPoint { | ||
| switch self { | ||
| case .leftRight: | ||
| return (from: CGPoint(x:-1, y:0.5), to: CGPoint(x:1, y:0.5)) | ||
| case .rightLeft: | ||
| return (from: CGPoint(x:1, y:0.5), to: CGPoint(x:-1, y:0.5)) | ||
| case .topBottom: | ||
| return (from: CGPoint(x:0.5, y:-1), to: CGPoint(x:0.5, y:1)) | ||
| case .bottomTop: | ||
| return (from: CGPoint(x:0.5, y:1), to: CGPoint(x:0.5, y:-1)) | ||
| case .topLeftBottomRight: | ||
| return (from: CGPoint(x:-1, y:-1), to: CGPoint(x:1, y:1)) | ||
| case .bottomRightTopLeft: | ||
| return (from: CGPoint(x:1, y:1), to: CGPoint(x:-1, y:-1)) | ||
| } | ||
| } | ||
|
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| var endPoint: GradientAnimationPoint { | ||
| switch self { | ||
| case .leftRight: | ||
| return (from: CGPoint(x:0, y:0.5), to: CGPoint(x:2, y:0.5)) | ||
| case .rightLeft: | ||
| return ( from: CGPoint(x:2, y:0.5), to: CGPoint(x:0, y:0.5)) | ||
| case .topBottom: | ||
| return ( from: CGPoint(x:0.5, y:0), to: CGPoint(x:0.5, y:2)) | ||
| case .bottomTop: | ||
| return ( from: CGPoint(x:0.5, y:2), to: CGPoint(x:0.5, y:0)) | ||
| case .topLeftBottomRight: | ||
| return ( from: CGPoint(x:0, y:0), to: CGPoint(x:2, y:2)) | ||
| case .bottomRightTopLeft: | ||
| return ( from: CGPoint(x:2, y:2), to: CGPoint(x:0, y:0)) | ||
| } | ||
| } | ||
| } | ||
|
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| public class SkeletonAnimationBuilder { | ||
|
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| public init() { | ||
| } | ||
|
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| public func makeSlidingAnimation(with direction: GradientDirection, duration: CFTimeInterval = 1.5) -> SkeletonLayerAnimation { | ||
| return { layer in | ||
|
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| let startPointAnim = CABasicAnimation(keyPath: #keyPath(CAGradientLayer.startPoint)) | ||
| startPointAnim.fromValue = NSValue(cgPoint: direction.startPoint.from) | ||
| startPointAnim.toValue = NSValue(cgPoint: direction.startPoint.to) | ||
|
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| let endPointAnim = CABasicAnimation(keyPath: #keyPath(CAGradientLayer.endPoint)) | ||
| endPointAnim.fromValue = NSValue(cgPoint: direction.endPoint.from) | ||
| endPointAnim.toValue = NSValue(cgPoint: direction.endPoint.to) | ||
|
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| let animGroup = CAAnimationGroup() | ||
| animGroup.animations = [startPointAnim, endPointAnim] | ||
| animGroup.duration = duration | ||
| animGroup.timingFunction = CAMediaTimingFunction(name: kCAMediaTimingFunctionEaseIn) | ||
| animGroup.repeatCount = .infinity | ||
|
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| return animGroup | ||
| } | ||
| } | ||
| } |
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