mastodon-ios/Mastodon/Scene/Transition/Search/SearchToSearchDetailViewCon...

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//
// SearchToSearchDetailViewControllerAnimatedTransitioning.swift
// Mastodon
//
// Created by MainasuK Cirno on 2021-7-13.
//
import os.log
import UIKit
final class SearchToSearchDetailViewControllerAnimatedTransitioning: ViewControllerAnimatedTransitioning {
private var animator: UIViewPropertyAnimator?
override init(operation: UINavigationController.Operation) {
super.init(operation: operation)
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self.transitionDuration = 0.2
}
deinit {
os_log("%{public}s[%{public}ld], %{public}s", ((#file as NSString).lastPathComponent), #line, #function)
}
}
// MARK: - UIViewControllerAnimatedTransitioning
extension SearchToSearchDetailViewControllerAnimatedTransitioning {
override func animateTransition(using transitionContext: UIViewControllerContextTransitioning) {
super.animateTransition(using: transitionContext)
switch operation {
case .push: pushTransition(using: transitionContext).startAnimation()
case .pop: popTransition(using: transitionContext).startAnimation()
default: return
}
}
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private func pushTransition(using transitionContext: UIViewControllerContextTransitioning, curve: UIView.AnimationCurve = .easeOut) -> UIViewPropertyAnimator {
guard let toVC = transitionContext.viewController(forKey: .to) as? SearchDetailViewController,
let toView = transitionContext.view(forKey: .to) else {
fatalError()
}
let toViewEndFrame = transitionContext.finalFrame(for: toVC)
transitionContext.containerView.addSubview(toView)
toView.frame = toViewEndFrame
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toView.alpha = 0
let animator = UIViewPropertyAnimator(duration: transitionDuration(using: transitionContext), curve: curve)
animator.addAnimations {
}
animator.addCompletion { position in
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toView.alpha = 1
transitionContext.completeTransition(true)
}
return animator
}
private func popTransition(using transitionContext: UIViewControllerContextTransitioning, curve: UIView.AnimationCurve = .easeInOut) -> UIViewPropertyAnimator {
guard let toVC = transitionContext.viewController(forKey: .to) as? SearchViewController,
let toView = transitionContext.view(forKey: .to) else {
fatalError()
}
let toViewEndFrame = transitionContext.finalFrame(for: toVC)
transitionContext.containerView.addSubview(toView)
toView.frame = toViewEndFrame
let animator = UIViewPropertyAnimator(duration: transitionDuration(using: transitionContext), curve: curve)
animator.addAnimations {
}
animator.addCompletion { position in
transitionContext.completeTransition(true)
}
return animator
}
}