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74 lines
3.0 KiB
74 lines
3.0 KiB
// The MIT License (MIT)
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//
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// Copyright (c) 2016 Luke Zhao <me@lkzhao.com>
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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import UIKit
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@available(iOS 10, tvOS 10, *)
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internal class HeroViewPropertyViewContext: HeroAnimatorViewContext {
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var viewPropertyAnimator: UIViewPropertyAnimator!
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var endEffect: UIVisualEffect?
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var startEffect: UIVisualEffect?
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override class func canAnimate(view: UIView, state: HeroTargetState, appearing: Bool) -> Bool {
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return view is UIVisualEffectView && state.opacity != nil
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}
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override func resume(timePassed: TimeInterval, reverse: Bool) -> TimeInterval {
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guard let visualEffectView = snapshot as? UIVisualEffectView else { return 0 }
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if reverse {
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viewPropertyAnimator?.stopAnimation(false)
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viewPropertyAnimator?.finishAnimation(at: .current)
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viewPropertyAnimator = UIViewPropertyAnimator(duration: duration, curve: .linear) {
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visualEffectView.effect = reverse ? self.startEffect : self.endEffect
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}
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}
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viewPropertyAnimator.startAnimation()
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return duration
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}
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override func seek(timePassed: TimeInterval) {
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viewPropertyAnimator?.pauseAnimation()
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viewPropertyAnimator?.fractionComplete = CGFloat(timePassed / duration)
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}
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override func clean() {
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super.clean()
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viewPropertyAnimator?.stopAnimation(false)
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viewPropertyAnimator?.finishAnimation(at: .current)
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viewPropertyAnimator = nil
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}
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override func startAnimations() -> TimeInterval {
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guard let visualEffectView = snapshot as? UIVisualEffectView else { return 0 }
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let appearedEffect = visualEffectView.effect
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let disappearedEffect = targetState.opacity == 0 ? nil : visualEffectView.effect
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startEffect = appearing ? disappearedEffect : appearedEffect
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endEffect = appearing ? appearedEffect : disappearedEffect
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visualEffectView.effect = startEffect
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viewPropertyAnimator = UIViewPropertyAnimator(duration: duration, curve: .linear) {
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visualEffectView.effect = self.endEffect
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}
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viewPropertyAnimator.startAnimation()
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return duration
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}
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}
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