swift 动画
// MARK:- 事件监听的函数
extension HomeViewController {
@objc private func titleBtnClick(titleBtn : TitleButton) {
// 1.改变按钮的状态
titleBtn.selected = !titleBtn.selected
// 2.创建弹出的控制器
let popoverVc = PopoverViewController()
// 3.设置控制器的modal样式
popoverVc.modalPresentationStyle = .Custom
// 4.设置转场的代理
popoverVc.transitioningDelegate = self
// 弹出控制器
presentViewController(popoverVc, animated: true, completion: nil)
}
}
// MARK:- 自定义转场代理的方法
extension HomeViewController : UIViewControllerTransitioningDelegate {
// 目的:改变弹出View的尺寸
func presentationControllerForPresentedViewController(presented: UIViewController, presentingViewController presenting: UIViewController, sourceViewController source: UIViewController) -> UIPresentationController? {
return LZJPresentationController(presentedViewController: presented, presentingViewController: presenting)
}
// 目的:自定义弹出的动画
func animationControllerForPresentedController(presented: UIViewController, presentingController presenting: UIViewController, sourceController source: UIViewController) -> UIViewControllerAnimatedTransitioning? {
isPresented = true
return self
}
// 目的:自定义消失的动画
func animationControllerForDismissedController(dismissed: UIViewController) -> UIViewControllerAnimatedTransitioning? {
isPresented = false
return self
}
}
// MARK:- 弹出和消失动画代理的方法
extension HomeViewController : UIViewControllerAnimatedTransitioning {
/// 动画执行的时间
func transitionDuration(transitionContext: UIViewControllerContextTransitioning?) -> NSTimeInterval {
return 0.5
}
/// 获取`转场的上下文`:可以通过转场上下文获取弹出的View和消失的View
// UITransitionContextFromViewKey : 获取消失的View
// UITransitionContextToViewKey : 获取弹出的View
func animateTransition(transitionContext: UIViewControllerContextTransitioning) {
isPresented ? animationForPresentedView(transitionContext) : animationForDismissedView(transitionContext)
}
/// 自定义弹出动画
private func animationForPresentedView(transitionContext: UIViewControllerContextTransitioning) {
// 1.获取弹出的View
let presentedView = transitionContext.viewForKey(UITransitionContextToViewKey)!
// 2.将弹出的View添加到containerView中
transitionContext.containerView()?.addSubview(presentedView)
// 3.执行动画
presentedView.transform = CGAffineTransformMakeScale(1.0, 0.0)
presentedView.layer.anchorPoint = CGPointMake(0.5, 0)
UIView.animateWithDuration(transitionDuration(transitionContext), animations: { () -> Void in
presentedView.transform = CGAffineTransformIdentity
}) { (_) -> Void in
// 必须告诉转场上下文你已经完成动画
transitionContext.completeTransition(true)
}
}
/// 自定义消失动画
private func animationForDismissedView(transitionContext: UIViewControllerContextTransitioning) {
// 1.获取消失的View
let dismissView = transitionContext.viewForKey(UITransitionContextFromViewKey)
// 2.执行动画
UIView.animateWithDuration(transitionDuration(transitionContext), animations: { () -> Void in
dismissView?.transform = CGAffineTransformMakeScale(1.0, 0.00001)
}) { (_) -> Void in
dismissView?.removeFromSuperview()
// 必须告诉转场上下文你已经完成动画
transitionContext.completeTransition(true)
}
}
}
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import UIKit
class LZJPresentationController: UIPresentationController {
// MARK:- 懒加载属性
private lazy var coverView : UIView = UIView()
// MARK:- 系统回调函数
override func containerViewWillLayoutSubviews() {
super.containerViewWillLayoutSubviews()
// 1.设置弹出View的尺寸
presentedView()?.frame = CGRect(x: 100, y: 55, width: 180, height: 250)
// 2.添加蒙版
setupCoverView()
}
}
// MARK:- 设置UI界面相关
extension LZJPresentationController {
private func setupCoverView() {
// 1.添加蒙版
containerView?.insertSubview(coverView, atIndex: 0)
// 2.设置蒙版的属性
coverView.backgroundColor = UIColor(white: 0.8, alpha: 0.2)
coverView.frame = containerView!.bounds
// 3.添加手势
let tapGes = UITapGestureRecognizer(target: self, action: "coverViewClick")
coverView.addGestureRecognizer(tapGes)
}
}
// MARK:- 事件监听
extension LZJPresentationController {
@objc private func coverViewClick() {
presentedViewController.dismissViewControllerAnimated(true, completion: nil)
}
}
