转场动画介绍
转场动画在我们日常开发中是经常遇到的,所谓转场动画,就是一个控制器的view切到另一个控制器的view上过程中过的动画效果。本例子是实现了在导航控
转场动画介绍
转场动画在我们日常开发中是经常遇到的,所谓转场动画,就是一个控制器的view切到另一个控制器的view上过程中过的动画效果。本例子是实现了在导航控制器的titleView边上慢慢弹出一个控制器。下面话不多说,来一起看看详细的介绍:
效果图:
专场前
专场后
示例代码
首先自定义一个animator类。在需要转场的控制器内,设置代理
//需要设置转场动画的控制器titleViewVc.transitioningDelegate = aniamator//这里的animator是animator的实例
下面是animator类中的代码
class animatorTool: NSObject { lazy var isPresent = false var callBack : ((isPresented:Bool)->())?//向外界传递动画是否正在显示 init(callBack : ((isPresented:Bool)->())) { self.callBack = callBack }//自定义构造方法,便于给闭包赋值 } extension animatorTool:UIViewControllerTransitioningDelegate{ func presentationControllerForPresentedViewController(presented: UIViewController, presentingViewController presenting: UIViewController, sourceViewController source: UIViewController) -> UIPresentationController? { return AWYPresentationController(presentedViewController: presented, presentingViewController: presenting)//AWYPresentationController是自定义继承自UIPresentationController的类,是为了设置modal出来的vc的view的大小 } func animationControllerForPresentedController(presented: UIViewController, presentingController presenting: UIViewController, sourceController source: UIViewController) -> UIViewControllerAnimatedTransitioning? { isPresent = true self.callBack!(isPresented: isPresent) return self } func animationControllerForDismissedController(dismissed: UIViewController) -> UIViewControllerAnimatedTransitioning? { isPresent = false self.callBack!(isPresented: isPresent) return self } } extension animatorTool:UIViewControllerAnimatedTransitioning{ func transitionDuration(transitionContext: UIViewControllerContextTransitioning?) -> NSTimeInterval { return 0.5//动画时长 } func animateTransition(transitionContext: UIViewControllerContextTransitioning) { isPresent ?animatetransitionForPresented(transitionContext) : animatetransitionForDismissed(transitionContext) } func animatetransitionForPresented(transitonContext:UIViewControllerContextTransitioning){ let aimView = transitonContext.viewForKey(UITransitionContextToViewKey)! transitonContext.containerView()?.addSubview(aimView) aimView.transform = CGAffineTransformMakeScale(1.0, 0.0) UIView.animateWithDuration(transitionDuration(transitonContext), animations: { aimView.layer.anchorPoint = CGPointMake(0.5, 0.0) aimView.transform = CGAffineTransformIdentity }) { (_) in transitonContext.completeTransition(true) } } func animatetransitionForDismissed(transitonContext:UIViewControllerContextTransitioning){ let aimView = transitonContext.viewForKey(UITransitionContextFromViewKey)! transitonContext.containerView()?.addSubview(aimView) UIView.animateWithDuration(transitionDuration(transitonContext), animations: { aimView.layer.anchorPoint = CGPointMake(0.5, 0.0) aimView.transform = CGAffineTransformMakeScale(1.0, 0.001)//留一点值,这样会有动画效果 }) { (_) in transitonContext.completeTransition(true) } } }
总结
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