iOS动画效果和实现


		动画效果提供了状态或页面转换时流畅的用户体验，在iOS系统中，咱们不需要自己编写绘制动画的代码，Core Animation提供了丰富的api来实现你需要的动画效果。
    UIKit只用UIView来展示动画,动画支持UIView下面的这些属性改变：
frame  
bounds  
center  
transform  
alpha 
backgroundColor 
contentStretch
 
1、commitAnimations方式使用UIView动画
[cpp] 
- (void)viewDidLoad  
{  
    [super viewDidLoad];  
      
    UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect];  
      
    [button setTitle:@"改变" forState:UIControlStateNormal];  
    button.frame = CGRectMake(10, 10, 60, 40);  
    [button addTarget:self action:@selector(changeUIView) forControlEvents:UIControlEventTouchUpInside];  
    [self.view addSubview:button];  
      
}  
  
- (void)changeUIView{  
    [UIView beginAnimations:@"animation" context:nil];  
    [UIView setAnimationDuration:1.0f];  
    [UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];  
    [UIView setAnimationTransition:UIViewAnimationTransitionFlipFromRight forView:self.view cache:YES];  
    [UIView commitAnimations];  
 }  
 
下面是点击改变后的效果（两种）：
 

动画的常量有一下四种
[cpp]  
UIViewAnimationTransitionNone,  
UIViewAnimationTransitionFlipFromLeft,  
UIViewAnimationTransitionFlipFromRight,  
UIViewAnimationTransitionCurlUp,  
UIViewAnimationTransitionCurlDown,  
 
1.2 交换本视图控制器中2个view位置
 [self.view exchangeSubviewAtIndex:1 withSubviewAtIndex:0];
先添加两个view ,一个r view plaincopy
- (void)viewDidLoad  
{  
    [super viewDidLoad];  
    UIView *redView = [[UIView alloc] initWithFrame:[[UIScreen mainScreen] bounds]];  
    redView.backgroundColor = [UIColor redColor];  
    [self.view addSubview:redView];  
      
    UIView *yellowView = [[UIView alloc] initWithFrame:[[UIScreen mainScreen] bounds]];  
    yellowView.backgroundColor = [UIColor yellowColor];  
    [self.view addSubview:yellowView];  
      
    UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect];  
    [button setTitle:@"改变" forState:UIControlStateNormal];  
    button.frame = CGRectMake(10, 10, 300, 40);  
    [button addTarget:self action:@selector(changeUIView) forControlEvents:UIControlEventTouchUpInside];  
    [self.view addSubview:button];  
      
    UIButton *button1 = [UIButton buttonWithType:UIButtonTypeRoundedRect];  
    [button1 setTitle:@"改变1" forState:UIControlStateNormal];  
    button1.frame = CGRectMake(10, 60, 300, 40);  
    [button1 addTarget:self action:@selector(changeUIView1) forControlEvents:UIControlEventTouchUpInside];  
    [self.view addSubview:button1];  
      
}  
 
[cpp] 
- (void)changeUIView1{  
    [UIView beginAnimations:@"animation" context:nil];  
    [UIView setAnimationDuration:1.0f];  
    [UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];  
    [UIView setAnimationTransition:UIViewAnimationTransitionCurlDown forView:self.view cache:YES];  
    //  交换本视图控制器中2个view位置  
    [self.view exchangeSubviewAtIndex:1 withSubviewAtIndex:0];  
    [UIView commitAnimations];  
}  

 
这样看起来就像两页一样了。
1.3 、   [UIView setAnimationDidStopSelector:@selector(animationFinish:)];
在commitAnimations消息之前，可以设置动画完成后的回调，设置方法是：
    [UIView setAnimationDidStopSelector:@selector(animationFinish:)];
 
2、使用：CATransition
[cpp] 
- (void)changeUIView2{  
    CATransition *transition = [CATransition animation];  
    transition.duration = 2.0f;  
      transition.type = kCATransitionPush;  
    transition.subtype = kCATransitionFromTop;  
    [self.view exchangeSubviewAtIndex:1 withSubviewAtIndex:0];  
    [self.view.layer addAnimation:transition forKey:@"animation"];  
}  
transition.type 的类型可以有
淡化、推挤、揭开、覆盖
NSString * const kCATransitionFade;
NSString * const kCATransitionMoveIn;
NSString * const kCATransitionPush;
NSString * const kCATransitionReveal;
这四种，
transition.subtype 
也有四种
NSString * const kCATransitionFromRight;
NSString * const kCATransitionFromLeft;
NSString * const kCATransitionFromTop;
NSString * const kCATransitionFromBottom;
 

 
2.2 私有的类型的动画类型：
立方体、吸收、翻转、波纹、翻页、反翻页、镜头开、镜头关
[cpp]  
animation.type = @"cube"  
animation.type = @"suckEffect";    
animation.type = @"oglFlip";//不管subType is "fromLeft" or "fromRight",official只有一种效果  
animation.type = @"rippleEffect";   
animation.type = @"pageCurl";   
animation.type = @"pageUnCurl"  
animation.type = @"cameraIrisHollowOpen ";  
animation.type = @"cameraIrisHollowClose ";  
下图是第一个cube立方体的效果：

2.3 CATransition的 startProgress  endProgress属性
这两个属性是float类型的。
可以控制动画进行的过程，可以让动画停留在某个动画点上，值在0.0到1.0之间。endProgress要大于等于startProgress。
比如上面的立方体转到，可以设置endProgress= 0.5，让动画停留在转动一般的位置。
上面这些私有的动画效果，在实际应用中要谨慎使用。因为在app store审核时可能会以为这些动画效果而拒绝通过。
 
 
3、UIView的 + (void)animateWithDuration
:(NSTimeIn

补充：移动开发 , IOS ,