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【Swift】IOS开发中自定义转场动画

在IOS开发中,我们model另外一个控制器的时候,一般都使用的自定义的转场动画。

其实我们可以自定义一些转场动画。达到不同的转场效果。

步骤如下:(photoBrowser是目标控制器)

1. 在源控制器中,设置目标控制器的转场代理为 self

1 //设置Model转场代理 2  photoBrowser.transitioningDelegate = self

2.同时设置目标控制器的model类型

1 //设置Model类型 2 photoBrowser.modalPresentationStyle=UIModalPresentationStyle.Custom

3.定义一个变量记录转场还是退场 (true为转场,false为退场

1 var isPersent =  false

4.在源控制器中设置跳转,目标控制器中设置关闭(动画要选择true)

1 presentViewController(photoBrowser, animated: true) { () -> Void in } 2 dismissViewControllerAnimated(true){SVProgressHUD.dismiss()}

5. 源控制器遵守两个代理

UIViewControllerTransitioningDelegate,

UIViewControllerAnimatedTransitioning

6. 源控制器实现 2 个代理方法

 1 func animationControllerForPresentedController(presented: UIViewController, presentingController presenting: UIViewController, sourceController source: UIViewController) -> UIViewControllerAnimatedTransitioning?{  2         //转场  3           isPersent = true  4         //源控制器自己负责转场  5         return self   6 }  7   8 func animationControllerForDismissedController(dismissed: UIViewController) -> UIViewControllerAnimatedTransitioning?{  9          10         //退场 11           isPersent = false 12         //源控制器自己负责转场 13         return self  14 }

7.源控制器再实现2个代理方法

 1 //转场时间  2 func transitionDuration(transitionContext: UIViewControllerContextTransitioning) -> NSTimeInterval  3   4 //转场上下文,负责转场动画的具体内容  5 func animateTransition(transitionContext: UIViewControllerContextTransitioning){  6 //转场动画  7         if isPersent{  8             if let toView = transitionContext.viewForKey(UITransitionContextToViewKey){  9                 //将傀儡视图(用于动画时展现的画面)加入containerView() 10                transitionContext.containerView().addSubview(self.persentedDummyView!) 11                 toView.frame = CGRectZero 12                 self.persentedDummyView?.frame = CGRectZero 13  14                 UIView.animateWithDuration(2.0, animations: { () -> Void in 15                      self.persentedDummyView?.frame = transitionContext.containerView().frame 16                     toView.frame = UIScreen.mainScreen().bounds 17                 }, completion: { (_) -> Void in 18                     //移除傀儡视图 19                      self.persentedDummyView?.removeFromSuperview() 20                     //加入要正常显示的视图 21                     transitionContext.containerView().addSubview(toView) 22                     //结束 23                     transitionContext.completeTransition(true) 24                 }) 25             } 26         } 27         //退场动画 28         if !isPersent{ 29             if let fromView = transitionContext.viewForKey(UITransitionContextFromViewKey){ 30                  31                 //隐藏目标控制器 32                 let fromVC = transitionContext.viewControllerForKey(UITransitionContextFromViewControllerKey) as! HJCPhotoBrowserViewController 33                 fromVC.view.hidden = true 34                //获得fromVC的快照 35                 let dummy = fromVC.collectionView.visibleCells().last!.snapshotViewAfterScreenUpdates(false) 36                 //将傀儡视图放入containerView 37                 transitionContext.containerView().addSubview(dummy) 38                 //执行动画 39                 UIView.animateWithDuration(2.0, animations: { () -> Void in 40                        dummy.frame = CGRectZero 41                     }, completion: { (_) -> Void in 42                         //移除傀儡视图 43                         dummy.removeFromSuperview() 44                         //结束 45                         transitionContext.completeTransition(true) 46                 }) 47             } 48         } 49     } 50  51  52 }
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