-(void)transitionView_from:(UIView*)one to: (UIView*)two {

CATransition *anim = [CATransition animation];

anim.delegate = self;

anim.duration = 0.4f; //動畫持續時間

anim.type = kCATransitionMoveIn; //動畫樣式

anim.subtype = kCATransitionFromTop; //動畫過度方向

anim.startPRogress = 0.6 ; //動畫開始于60%進度

anim.endProgress = 1; //動畫結束于100%進度

NSInteger index_twoView = [[self.view subviews] indexOfObject : two ] ;

NSInteger index_oneView = [[self.view subviews] indexOfObject : one ] ;

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[self.view echangeSubviewAtIndex : index_oneView withSubviewAtIndex: index_twoView ]; //動畫為two進入，one退出。

[self.view.layer addSAnimation: anim forKey: @"animation"]; //開始動畫

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}