iOS 控制器自定義動畫跳轉(zhuǎn)方法(模態(tài)跳轉(zhuǎn))

更新時間：2018年01月09日 10:31:54 作者：iMazy

下面小編就為大家分享一篇iOS 控制器自定義動畫跳轉(zhuǎn)方法(模態(tài)跳轉(zhuǎn))，具有很好的參考價值，希望對大家有所幫助。一起跟隨小編過來看看吧

參考資料：

Apple 開發(fā)文檔 Customizing the Transition Animations

WWDC 2013 Custom Transitions Using View Controllers

圖例：

跳轉(zhuǎn)的動畫有很多，全部可以自定義

創(chuàng)建自定義跳轉(zhuǎn)必須遵循的三個步驟:

1、創(chuàng)建一個類,并實現(xiàn)了 UIViewControllerAnimatedTransitioning 協(xié)議

2、創(chuàng)建一個類作為 UIViewControllerTransitioningDelegate 過渡代理

3、在模態(tài)跳轉(zhuǎn)前修改控制器的 transitioningDelegate 代理為自定義的代理（步驟2的代理類）

核心代碼示例

一、創(chuàng)建一個類，并實現(xiàn)了 UIViewControllerAnimatedTransitioning 協(xié)議

這個協(xié)議主要控制控制器視圖的顯示的，通過 transitionContext 可以獲取到每個視圖和控制器，并進(jìn)行動畫的設(shè)置

class AnimatedTransitioning: NSObject {
 var isPresenting: Bool = false
}
extension AnimatedTransitioning: UIViewControllerAnimatedTransitioning {
 func transitionDuration(using transitionContext: UIViewControllerContextTransitioning?) -> TimeInterval {
 return 0.5
 }
 func animateTransition(using transitionContext: UIViewControllerContextTransitioning) {
 let fromView = transitionContext.view(forKey: .from)!
 let toView = transitionContext.view(forKey: .to)!
 let containerView = transitionContext.containerView
 if isPresenting {
  toView.transform = CGAffineTransform(scaleX: 0, y: 0)
  containerView.addSubview(toView)
 } else {
  containerView.insertSubview(toView, belowSubview: fromView)
 }
 UIView.animate(withDuration: 0.5, animations: {
  if self.isPresenting {
  toView.transform = CGAffineTransform.identity
  } else {
  fromView.transform = CGAffineTransform(scaleX: 0.001, y: 0.001)
  }
 }) { (finished) in
  transitionContext.completeTransition(finished)
 }
 }
}

二、創(chuàng)建一個類作為 UIViewControllerTransitioningDelegate 過渡代理

這里設(shè)置 presented 和 dismissed 時各自的動畫轉(zhuǎn)換類，可以設(shè)置為不同的類

class CustomTransitioningDelegate: NSObject, UIViewControllerTransitioningDelegate {
 func animationController(forPresented presented: UIViewController, presenting: UIViewController, source: UIViewController) -> UIViewControllerAnimatedTransitioning? {
 let at = AnimatedTransitioning()
 at.isPresenting = true
 return at
 }
 func animationController(forDismissed dismissed: UIViewController) -> UIViewControllerAnimatedTransitioning? {
 let at = AnimatedTransitioning()
 at.isPresenting = false
 return at
 }
}

三、在模態(tài)跳轉(zhuǎn)前修改控制器的 transitioningDelegate 代理為自定義的代理

注意：代理不能為局部變量

class ViewController: UIViewController {
 // 必須保存為實例變量
 var ctDelegate = CustomTransitioningDelegate()
 override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
 let vc = TempViewController()
 vc.transitioningDelegate = ctDelegate
 self.present(vc, animated: true, completion: nil)
 }
}

以上這篇iOS 控制器自定義動畫跳轉(zhuǎn)方法(模態(tài)跳轉(zhuǎn))就是小編分享給大家的全部內(nèi)容了，希望能給大家一個參考，也希望大家多多支持腳本之家。

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