iOS核心动画-2

一.基本方式:使用UIView类的UIViewAnimation扩展
函数说明

+ (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在快外调用无效+ (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;

一个动画的代码

[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];

其中transition取值范围

typedef enum {UIViewAnimationTransitionNone,UIViewAnimationTransitionFlipFromLeft,UIViewAnimationTransitionFlipFromRight,UIViewAnimationTransitionCurlUp,UIViewAnimationTransitionCurlDown,} UIViewAnimationTransition;

特点:基础,使用方便,但是效果有限

二.block方式:使用UIView类的UIViewAnimationWithBlocks扩展

函数说明

+ (void)animateWithDuration:(NSTimeInterval)duration delay:(NSTimeInterval)delay options:(UIViewAnimationOptions)options animations:(void (^)(void))animations completion:(void (^)(BOOL finished))completion __OSX_AVAILABLE_STARTING(__MAC_NA,__IPHONE_4_0);//间隔,延迟,动画参数(好像没用?),界面更改块,结束块+ (void)animateWithDuration:(NSTimeInterval)duration animations:(void (^)(void))animations completion:(void (^)(BOOL finished))completion __OSX_AVAILABLE_STARTING(__MAC_NA,__IPHONE_4_0); // delay = 0.0, options = 0+ (void)animateWithDuration:(NSTimeInterval)duration animations:(void (^)(void))animations __OSX_AVAILABLE_STARTING(__MAC_NA,__IPHONE_4_0); // delay = 0.0, options = 0, completion = NULL+ (void)transitionWithView:(UIView *)view duration:(NSTimeInterval)duration options:(UIViewAnimationOptions)options animations:(void (^)(void))animations completion:(void (^)(BOOL finished))completion __OSX_AVAILABLE_STARTING(__MAC_NA,__IPHONE_4_0);+ (void)transitionFromView:(UIView *)fromView toView:(UIView *)toView duration:(NSTimeInterval)duration options:(UIViewAnimationOptions)options completion:(void (^)(BOOL finished))completion __OSX_AVAILABLE_STARTING(__MAC_NA,__IPHONE_4_0); // toView added to fromView.superview, fromView removed from its superview界面替换,这里的options参数有效

举例:

[UIView animateWithDuration:0.7 delay:0 options:0 animations:^(){self.view.alpha = 0.2;[self.view exchangeSubviewAtIndex:1 withSubviewAtIndex:0];self.view.alpha = 1;} completion:^(BOOL finished){}];

当areAnimationsEnabled为NO时,上面不能动画显示

[UIView transitionFromView:lImage toView:mImage duration:0.7 options:options completion:^(BOOL finished){if (finished) {[self.view addSubview:lImage];[self.view sendSubviewToBack:lImage];[self.view sendSubviewToBack:mImage];} }];

options取值范围

enum {UIViewAnimationOptionLayoutSubviews = 1 << 0,UIViewAnimationOptionAllowUserInteraction = 1 << 1, // turn on user interaction while animatingUIViewAnimationOptionBeginFromCurrentState = 1 << 2, // start all views from current value, not initial valueUIViewAnimationOptionRepeat = 1 << 3, // repeat animation indefinitelyUIViewAnimationOptionAutoreverse = 1 << 4, // if repeat, run animation back and forthUIViewAnimationOptionOverrideInheritedDuration = 1 << 5, // ignore nested durationUIViewAnimationOptionOverrideInheritedCurve = 1 << 6, // ignore nested curveUIViewAnimationOptionAllowAnimatedContent = 1 << 7, // animate contents (applies to transitions only)UIViewAnimationOptionShowHideTransitionViews = 1 << 8, // flip to/from hidden state instead of adding/removingUIViewAnimationOptionCurveEaseInOut = 0 << 16, // defaultUIViewAnimationOptionCurveEaseIn = 1 << 16,UIViewAnimationOptionCurveEaseOut = 2 << 16,UIViewAnimationOptionCurveLinear = 3 << 16,UIViewAnimationOptionTransitionNone = 0 << 20, // defaultUIViewAnimationOptionTransitionFlipFromLeft = 1 << 20,UIViewAnimationOptionTransitionFlipFromRight = 2 << 20,UIViewAnimationOptionTransitionCurlUp = 3 << 20,UIViewAnimationOptionTransitionCurlDown = 4 << 20,UIViewAnimationOptionTransitionCrossDissolve = 5 << 20,//ios5UIViewAnimationOptionTransitionFlipFromTop = 6 << 20,//ios5UIViewAnimationOptionTransitionFlipFromBottom = 7 << 20,//ios5};typedef NSUInteger UIViewAnimationOptions;

特点:快捷方便,效果更多.可以如上示例1那样实现界面个元素属性渐进变化的动态展示

三.core方式:使用CATransition类
使用要引入QuartzCore.framework
官方有个示例:ViewTransitions
基本上就是

CATransition *transition = [CATransition animation];transition.duration = 0.7;transition.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];transition.type = kCATransitionMoveIn;//{kCATransitionMoveIn, kCATransitionPush, kCATransitionReveal, kCATransitionFade};//更多私有{@"cube",@"suckEffect",@"oglFlip",@"rippleEffect",@"pageCurl",@"pageUnCurl",@"cameraIrisHollowOpen",@"cameraIrisHollowClose"};transition.subtype = kCATransitionFromLeft;//{kCATransitionFromLeft, kCATransitionFromRight, kCATransitionFromTop, kCATransitionFromBottom};transition.delegate = self;[self.view.layer addAnimation:transition forKey:nil];// 要做的[self.view exchangeSubviewAtIndex:1 withSubviewAtIndex:0];

其中需要注意的是:界面调整(动画前后展示的两个界面)需要在动画时间内完成,否则没有效果,对下次也有影响,我测的不是太完整,大家自己写个performSelector: withObject: afterDelay:试验下看看就知道.

特点:动画效果较多(但是私有),可以实现UIViewController之间的动画

demo:animations.zip