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运用uiview的几个animation方面可以使动画变的更加简单
1. 如果是view properties 的变化，使用以下方法
+ (void)animateWithDuration:(NSTimeInterval)duration delay:(NSTimeInterval)delay options:(UIViewAnimationOptions)options animations:(void (^)(void))animations completion:(void (^)(BOOL finished))completion; + (void)animateWithDuration:(NSTimeInterval)duration animations:(void (^)(void))animations completion:(void (^)(BOOL finished))completion; + (void)animateWithDuration:(NSTimeInterval)duration animations:(void (^)(void))animations; + (void)animateWithDuration:(NSTimeInterval)duration delay:(NSTimeInterval)delay usingSpringWithDamping:(CGFloat)dampingRatio initialSpringVelocity:(CGFloat)velocity options:(UIViewAnimationOptions)options animations:(void (^)(void))animations completion:(void (^)(BOOL finished))completion;
可以用作animation的properties有：frame，bounds，center，alpha, transform(setTransform),bkgcolor
如果options中有repeat 选项，那么该如何停止动画呢？
可用[self.layer removeAllAnimations];停止动画
更多控制，设置 CAMediaTiming中properties（可参考http://www.cnblogs.com/gaoxiao228/archive/2013/01/28/2880285.html）
2. 如果是view 的hierachy 变化，使用以下方法：
+ (void)transitionWithView:(UIView *)view duration:(NSTimeInterval)duration options:(UIViewAnimationOptions)options animations:(void (^)(void))animations completion:(void (^)(BOOL finished))completion ; + (void)transitionFromView:(UIView *)fromView toView:(UIView *)toView duration:(NSTimeInterval)duration options:(UIViewAnimationOptions)options completion:(void (^)(BOOL finished))completion; // toView added to fromView.superview, fromView removed from its superview
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原文地址：http://www.cnblogs.com/beddup/p/4614652.html
