ios 对于UIView的动画的初步理解

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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 CATransitonCATransiton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：

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