ios 对于UIView的动画的初步理解

基本函数：
+ (void)beginAnimations:(NSString *)animationID context:(void *)context; // 开始准备动画
+ (void)commitAnimations; // 运行动画
// 没有get方法,下面的set在外调用无效
+ (void)setAnimationDelegate:(id)delegate; // 委托default = nil
+ (void)setAnimationWillStartSelector:(SEL)selector; // default = NULL. -animationWillStart:(NSString *)animationID context:(void *)context
+ (void)setAnimationDidStopSelector:(SEL)selector; // default = NULL. -animationDidStop:(NSString *)animationID finished:(NSNumber *)finished context:(void *)context
+ (void)setAnimationDuration:(NSTimeInterval)duration; // default = 0.2动画时间
+ (void)setAnimationDelay:(NSTimeInterval)delay; // default = 0.0延迟多少时间开始执行动画
+ (void)setAnimationStartDate:(NSDate *)startDate; // default = now ([NSDate date])动画开始日期?不知道啥用.- -
+ (void)setAnimationCurve:(UIViewAnimationCurve)curve; // default = UIViewAnimationCurveEaseInOut动画方式
+ (void)setAnimationRepeatCount:(float)repeatCount; // default = 0.0. May be fractional重复次数
+ (void)setAnimationRepeatAutoreverses:(BOOL)repeatAutoreverses; // default = NO. YES的话,动画(非最后一次)结束后动态复原到最开始状态
+ (void)setAnimationBeginsFromCurrentState:(BOOL)fromCurrentState; // default = NO. YES,停止之前的动画,从现在这里开始新动画the current view position is always used for new animations -- allowing animations to "pile up" on each other. Otherwise, the last end state is used for the animation (the default).

+ (void)setAnimationTransition:(UIViewAnimationTransition)transition forView:(UIView *)view cache:(BOOL)cache; // 添加动画到view上,cache是YES的时候比较高效,但是动画过程中不能更新界面上的内容,NO时每一帧都重新画,可以实时更新
+ (void)setAnimationsEnabled:(BOOL)enabled; // 是否忽略一些动画设置
+ (BOOL)areAnimationsEnabled;      

动画示例：

[UIView beginAnimations:nil context:nil];
[UIView setAnimationCurve:UIViewAnimationCurveLinear];
[UIView setAnimationDuration:2.7];
[UIView setAnimationTransition:transition forView:self.view cache:YES];
// operation>>>
[self.view exchangeSubviewAtIndex:0 withSubviewAtIndex:1];
// end<<<<<<
[UIView commitAnimations];


Transition的取值范围：
       
typedef enum {
UIViewAnimationTransitionNone,//         不使用动画                
UIViewAnimationTransitionFlipFromLeft,//         从左向右旋转翻页                
UIViewAnimationTransitionFlipFromRight,         //从右向左旋转翻页，与UIViewAnimationTransitionFlipFromLeft相反                
   
     

   UIViewAnimationTransitionCurlUp,//         卷曲翻页，从下往上                
UIViewAnimationTransitionCurlDown,         卷曲翻页，从上往下                
} UIViewAnimationTransition;

示例：

   
    
              [UIView beginAnimations:              @"animationID"              context:nil];              //开始一个动画块，第一个参数为动画块标识              [UIView setAnimationDuration:0.5f];              //设置动画的持续时间              [UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];              //设置动画块中的动画属性变化的曲线，此方法必须在beginAnimations方法和commitAnimations，默认即为UIViewAnimationCurveEaseInOut效果。详细请参见UIViewAnimationCurve              [UIView setAnimationRepeatAutoreverses:NO];              //设置是否自动反转当前的动画效果              [UIView setAnimationTransition:UIViewAnimationTransitionFlipFromLeft forView:self.view cache:YES];              //设置过渡的动画效果，此处第一个参数可使用上面5种动画效果              [self.view exchangeSubviewAtIndex:1 withSubviewAtIndex:0];              //页面翻转              [UIView commitAnimations];              //提交动画

 CATransiton                
     
CATransiton官方提供4种动画效果，分别为：

     
NSString * const kCATransitionFade;//渐渐消失

     
NSString * const kCATransitionMoveIn;//覆盖进入

     
NSString * const kCATransitionPush;//推出

     
NSString * const kCATransitionReveal;//与MoveIn相反

     
例子：

     
      
                CATransition *animation = [CATransition animation];              //初始化动画              animation.duration = 0.5f;              //间隔的时间              animation.timingFunction = UIViewAnimationCurveEaseInOut;              animation.type = kCATransitionPush;              //设置上面4种动画效果              animation.subtype = kCATransitionFromTop;              //设置动画的方向，有四种，分别为kCATransitionFromRight、kCATransitionFromLeft、kCATransitionFromTop、kCATransitionFromBottom              [self.view.layer addAnimation:animation forKey:              @"animationID"              ];                
      
     

    
   
具体代码与效果如下：