UIView動畫

CGContextRef context = UIGraphicsGetCurrentContext();
	[UIView beginAnimations:nil context:context];
	[UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];
	[UIView setAnimationDuration:1.0];
     //使用當前正在運行的動畫狀態開始下一段動畫，避免了因動畫狀態不一樣而產生的跳躍
    [UIView setAnimationBeginsFromCurrentState:YES];
	[[self.view viewWithTag:999] setAlpha:1.0f];
	[UIView commitAnimations];

一，試圖的交換：

UIView *frontObject = [[self.view subviews] objectAtIndex:2];
 UIView *backObject = [[self.view subviews] objectAtIndex:1];
 
 CGContextRef context = UIGraphicsGetCurrentContext();
 [UIView beginAnimations:nil context:context];
 [UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];
 [UIView setAnimationDuration:1.0];
 
 frontObject.alpha = 0.0f;
 backObject.alpha = 1.0f;
 frontObject.transform = CGAffineTransformMakeScale(0.25f, 0.25f);//縮放的比例
    
 backObject.transform = CGAffineTransformIdentity;//重置視圖
 [self.view exchangeSubviewAtIndex:1 withSubviewAtIndex:2];//交換兩個字視圖的索引


 [UIView setAnimationDelegate:self];
 [UIView setAnimationDidStopSelector:@selector(animationFinished:)];//動畫執行完以後的回調方法
 [UIView commitAnimations];

二，翻轉視圖

CGContextRef context = UIGraphicsGetCurrentContext();
 [UIView beginAnimations:nil context:context];
 [UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];
 [UIView setAnimationDuration:1.0];
 
 UIView *whiteBackdrop = [self.view viewWithTag:100];


 // Choose left or right flip
 if ([(UISegmentedControl *)self.navigationItem.titleView selectedSegmentIndex])
 [UIView setAnimationTransition: UIViewAnimationTransitionFlipFromLeft forView:whiteBackdrop cache:YES];
 else
 [UIView setAnimationTransition: UIViewAnimationTransitionFlipFromRight forView:whiteBackdrop cache:YES];


    
    //交換兩個視圖
 NSInteger purple = [[whiteBackdrop subviews] indexOfObject:[whiteBackdrop viewWithTag:999]];
 NSInteger maroon = [[whiteBackdrop subviews] indexOfObject:[whiteBackdrop viewWithTag:998]];
 [whiteBackdrop exchangeSubviewAtIndex:purple withSubviewAtIndex:maroon];


 [UIView setAnimationDelegate:self];
 [UIView setAnimationDidStopSelector:@selector(animationFinished:)];
 [UIView commitAnimations];

三，翻頁動畫

CGContextRef context = UIGraphicsGetCurrentContext();
 [UIView beginAnimations:nil context:context];
 [UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];
 [UIView setAnimationDuration:1.0];
 
 UIView *whiteBackdrop = [self.view viewWithTag:100];


 // Choose up or down curl
 if ([(UISegmentedControl *)self.navigationItem.titleView selectedSegmentIndex])
 [UIView setAnimationTransition: UIViewAnimationTransitionCurlUp forView:whiteBackdrop cache:YES];
 else
 [UIView setAnimationTransition: UIViewAnimationTransitionCurlDown forView:whiteBackdrop cache:YES];


 NSInteger purple = [[whiteBackdrop subviews] indexOfObject:[whiteBackdrop viewWithTag:999]];
 NSInteger maroon = [[whiteBackdrop subviews] indexOfObject:[whiteBackdrop viewWithTag:998]];
 [whiteBackdrop exchangeSubviewAtIndex:purple withSubviewAtIndex:maroon];


 [UIView setAnimationDelegate:self];
 [UIView setAnimationDidStopSelector:@selector(animationFinished:)];
 [UIView commitAnimations];

UIViewAnimationTransition的幾種效果

    UIViewAnimationTransitionNone,
    UIViewAnimationTransitionFlipFromLeft,//UIView過分，從左向右翻轉，用新視圖代替舊視圖
    UIViewAnimationTransitionFlipFromRight,//UIView過分，從右向左翻轉，隱藏舊視圖，顯示新視圖
    UIViewAnimationTransitionCurlUp, //用從下向上翻頁蓋住舊視圖
    UIViewAnimationTransitionCurlDown,//新視圖從上向下翻頁蓋住舊視圖