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iOS swift实现转场动画的方法示例

作者:awyys

在平时的iOS开发中,我们进行界面跳转时一般都是采用系统默认的转场动画,而下面这篇文章主要给大家介绍了关于iOS利用swift实现转场动画的方法示例,文中通过示例代码介绍的非常详细,需要的朋友可以参考借鉴,下面来一起看看吧。

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

以上就是这篇文章的全部内容了,希望本文的内容对大家的学习或者工作能带来一定的帮助,如果有疑问大家可以留言交流,谢谢大家对脚本之家的支持。

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