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55 lines
2.1 KiB
55 lines
2.1 KiB
1 year ago
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// CustomMaskTransiton.swift
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// AnimationTransitionDemo
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//
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// Created by junjie on 2019/9/10.
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// Copyright © 2019 junjie. All rights reserved.
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//
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import UIKit
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class CustomMaskTransiton: NSObject, UIViewControllerAnimatedTransitioning {
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var transition: UIViewControllerContextTransitioning?
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func transitionDuration(using transitionContext: UIViewControllerContextTransitioning?) -> TimeInterval {
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return 0.5
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}
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func animateTransition(using transitionContext: UIViewControllerContextTransitioning) {
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transition = transitionContext
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let fromVC = transitionContext.viewController(forKey: .from) as! CustomMaskViewController
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let toVC = transitionContext.viewController(forKey: .to) as! NextViewController
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let containerView = transitionContext.containerView
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containerView.addSubview(toVC.view)
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//设置遮罩
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let buttonFrame = fromVC.currentView.frame
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let startPath = UIBezierPath(roundedRect: buttonFrame, cornerRadius: 40)
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let endPath = UIBezierPath(roundedRect: CGRect(origin: CGPoint(x:-230, y: 0), size: CGSize(width: UIScreen.main.bounds.height, height: UIScreen.main.bounds.height+100)), cornerRadius: UIScreen.main.bounds.height/2)
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let shapeLayer = CAShapeLayer()
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toVC.view.layer.mask = shapeLayer
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//防最后屏闪
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shapeLayer.path = endPath.cgPath
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let basicAnimation = CABasicAnimation(keyPath: "path")
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basicAnimation.fromValue = startPath.cgPath
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basicAnimation.toValue = endPath.cgPath
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basicAnimation.duration = self.transitionDuration(using: transitionContext)
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basicAnimation.timingFunction = CAMediaTimingFunction(name: .easeInEaseOut)
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basicAnimation.delegate = self
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shapeLayer.add(basicAnimation, forKey: nil)
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}
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}
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extension CustomMaskTransiton: CAAnimationDelegate {
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func animationDidStop(_ anim: CAAnimation, finished flag: Bool) {
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let toVC = transition?.viewController(forKey: .to) as! NextViewController
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toVC.view.layer.mask = nil
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transition?.completeTransition(!transition!.transitionWasCancelled)
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}
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}
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