IOS swift的動畫效果及實現方法

    //點擊屏幕的事件

       override func touchesBegan(touches: Set<NSObject>, withEvent event: UIEvent) {

           //自定義動畫效果

           func anim(){

               img1.alpha=0.1

               img1.center=CGPoint(x: 0.0, y: 0.0)

           }

           func completion(v:Bool){

               println("anim completion(v):(falg)")

           }


       UIView.transitionWithView(img1, duration: 1.0, options: UIViewAnimationOptions.TransitionNone, animations: anim, completion: completion)  


         //視圖動畫效果 3步  1：開始動畫 2:配置動畫  3:提交動畫  
         UIView.beginAnimations(nil, context: nil)  
         UIView.setAnimationTransition(UIViewAnimationTransition.CurlDown, forView: img1, cache: true)  
         UIView.setAnimationDuration(1.0)  
         UIView.commitAnimations()  


       //視圖的切換  

       if falg{  
           falg=false  
           /*視圖切換 
           fromView 開始視圖 
           toView 結束視圖 
           duration 效果時間 
           options 動畫效果模式 
           completion 回調方法 
           */  
           UIView.transitionFromView(img2, toView: img1, duration: 1.0, options: UIViewAnimationOptions.TransitionFlipFromRight, completion: completion)  
       }else{  
           falg=true  
           UIView.transitionFromView(img1, toView: img2, duration: 1.0, options: UIViewAnimationOptions.TransitionFlipFromLeft, completion: completion)  
       }  

   }  </pre>