CAAnimation---CAPropertyAnimation---CABasicAnimation & CAKeyFrameAnimation
CAPropertyAnimation:作用于图层的某个单一属性,并指定它的一个目标值,或者一连串将要做动画的值。CAPropertyAnimation通过指定动画的keyPath作用于单一的属性,CAAnimation通常应用于一个指定的CALayer,于是这里的keyPath指的也就是图层的keyPath了。实际这个keyPath是一个关键路径,而不仅仅是一个属性的名称。这意味着动画不仅可以作用于图层本身的属性,还包含了它的子成员的属性,甚至是一些虚拟的属性。
CABasicAnimation 继承于CAPropertyAnimation,并添加了三个属性: fromValue、toValue、byValue[注:三个属性都是id类型,因为属性动画可以用作很多不同种的属性类型,包括数字类型、矢量、变换矩阵、甚至是颜色或者图片]
一般我们只需要使用三个属性中的两个fromValue & toValue或者fromValue & byValue。
eg:如果设置了fromValue = 2, toValue = 5,byValue = 6。那么Core Animation就不知道结果到底是2->5,还是2->(2 + 6)。两种用法会冲突。
当你创建一个 CABasicAnimation 时,你需要通过-setFromValue 和-setToValue 来指定一个开始值和结束值。 当你增加基础动画到层中的时候,它开始运行。当用属性做动画完成时,例如用位置属性做动画,层就会立刻返回到它的初始位置。因为动画并没有改变图层的模型,而只是呈现,并没有真的改变属性的值。如果你想改变属性的值,必须显式的设置该属性的值。 [在有些时候,比如你想改变层的背景色,这时候你真的改变属性的值(在动画开始之前或者结束后),效果也许会好点]
CAAnimationDelegate扩展NSObject类的两个方法可以监测动画的开始和结束:
- (void)animationDidStart:(CAAnimation *)aim;
- (void)animationDidStop:(CAAnimation *)anim finished:(BOOL)flag;
UIView *view0 = [[UIView alloc]initWithFrame:CGRectMake(100, 0, 100, 100)];
[self.view addSubview:view0];
CABasicAnimation *contents = [CABasicAnimation animationWithKeyPath:@"contents"];
contents.duration = 1.f;
contents.fromValue = (id)[UIImage imageNamed:@"星空"].CGImage;
contents.toValue = (id)[UIImage imageNamed:@"艾薇儿"].CGImage;
contents.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
contents.repeatCount = CGFLOAT_MAX;
contents.autoreverses = YES;
[view0.layer addAnimation:contents forKey:@"contents"];//<span style="font-family: verdana, Arial, Helvetica, sans-serif;">这告诉了层当需要做动画时, 使用我们给关键路径指定的新动画。</span>
如果我们没有设置最后一句的key,那么将找不到我们设置的animation,会使用默认的动画。下面是一些继承的常用的属性
Autoreverses : 当你设定这个属性为 YES 时,在它到达目的地之后,动画的返回到开始的值,代替了直接跳转到开始的值。
Duration: Duration 这个参数你已经相当熟悉了。它设定开始值到结束值花费的时间。期间会被速度的属性所影响。
RemovedOnCompletion : 这个属性默认为 YES,那意味着,在指定的时间段完成后,动画就自动的从层上移除了。这个一般不用。
假如你想要再次用这个动画时,你需要设定这个属性为 NO。这样的话,下次你在通过-set 方法设定动画的属 性时,它将再次使用你的动画,而非默认的动画。
Speed : 默认的值为 1.0.这意味着动画播放按照默认的速度。如果你改变这个值为 2.0,动画会用 2 倍的速度播放。 这样的影响就是使持续时间减半。如果你指定的持续时间为 6 秒,速度为 2.0,动画就会播放 3 秒钟---一半的 持续时间。
BeginTime : 这个属性在组动画中很有用。它根据父动画组的持续时间,指定了开始播放动画的时间。默认的是 0.0
TimeOffset : 如果一个时间偏移量是被设定,动画不会真正的可见,直到根据父动画组中的执行时间得到的时间都流逝 了。
RepeatCount : 默认的是 0,意味着动画只会播放一次。如果指定一个无限大的重复次数,使用 1e100f。这个不应该和 repeatDration 属性一块使用。
RepeatDuration : 这个属性指定了动画应该被重复多久。动画会一直重复,直到设定的时间流逝完。它不应该和 repeatCount 一起使用。
通常这样联合使用来让动画停在最后的位置,但是属性的值没改,除非手动更改。
animationTranslation.removedOnCompletion =NO;
animationTranslation.fillMode =kCAFillModeForwards;
animationWithKeyPath的值:
transform.scale = 比例轉換
transform.scale.x = 闊的比例轉換
transform.scale.y = 高的比例轉換
transform.rotation.z = 平面圖的旋轉
opacity = 透明度
margin
zPosition
backgroundColor 背景颜色
cornerRadius 圆角
borderWidth
bounds
contents
contentsRect
cornerRadius
frame
hidden
mask
masksToBounds
opacity
position
shadowColor
shadowOffset
shadowOpacity
shadowRadius
下面是一些例子
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|
CABasicAnimation
*pulse = [CABasicAnimation animationWithKeyPath: @"transform.scale" ]; pulse.timingFunction
= [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseOut]; pulse.duration
= 0.5 + (rand() % 10) * 0.05; pulse.repeatCount
= 1; pulse.autoreverses
= YES; pulse.fromValue
= [NSNumber numberWithFloat:.8]; pulse.toValue
= [NSNumber numberWithFloat:1.2]; [self.ui_View.layer
addAnimation:pulse forKey:nil]; //
bounds CABasicAnimation
*anim = [CABasicAnimation animationWithKeyPath: @"bounds" ]; anim.duration
= 1.f; anim.fromValue
= [NSValue valueWithCGRect:CGRectMake(0,0,10,10)]; anim.toValue
= [NSValue valueWithCGRect:CGRectMake(10,10,200,200)]; anim.byValue
= [NSValue valueWithCGRect:self. ui_View.bounds]; //
anim.toValue = (id)[UIColor redColor].CGColor; //
anim.fromValue = (id)[UIColor blackColor].CGColor; anim.timingFunction
= [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut]; anim.repeatCount
= 1; anim.autoreverses
= YES; [ui_View.layer
addAnimation:anim forKey:nil]; //cornerRadius CABasicAnimation
*anim2 = [CABasicAnimation animationWithKeyPath: @"cornerRadius" ]; anim2.duration
= 1.f; anim2.fromValue
= [NSNumber numberWithFloat:0.f]; anim2.toValue
= [NSNumber numberWithFloat:20.f]; anim2.timingFunction
= [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut]; anim2.repeatCount
= CGFLOAT_MAX; anim2.autoreverses
= YES; [ui_View.layer
addAnimation:anim2 forKey: @"cornerRadius" ]; //contents CABasicAnimation
*anim = [CABasicAnimation animationWithKeyPath: @"contents" ]; anim.duration
= 1.f; anim.fromValue
= (id)[UIImage imageNamed: @"1.jpg" ].CGImage; anim.toValue
= (id)[UIImage imageNamed: @"2.png" ].CGImage; //
anim.byValue = (id)[UIImage imageNamed:@"3.png"].CGImage; //
anim.toValue = (id)[UIColor redColor].CGColor; //
anim.fromValue = (id)[UIColor blackColor].CGColor; anim.timingFunction
= [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut]; anim.repeatCount
= CGFLOAT_MAX; anim.autoreverses
= YES; [ui_View.layer
addAnimation:anim forKey:nil]; [ui_View.layer
setShadowOffset:CGSizeMake(2,2)]; [ui_View.layer
setShadowOpacity:1]; [ui_View.layer
setShadowColor:[UIColor grayColor].CGColor]; // CABasicAnimation
*anim = [CABasicAnimation animationWithKeyPath: @"shadowColor" ]; anim.duration
= 1.f; anim.toValue
= (id)[UIColor redColor].CGColor; anim.fromValue
= (id)[UIColor blackColor].CGColor; anim.timingFunction
= [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut]; anim.repeatCount
= CGFLOAT_MAX; anim.autoreverses
= YES; [ui_View.layer
addAnimation:anim forKey:nil]; CABasicAnimation
*_anim = [CABasicAnimation animationWithKeyPath: @"shadowOffset" ]; _anim.duration
= 1.f; _anim.fromValue
= [NSValue valueWithCGSize:CGSizeMake(0,0)]; _anim.toValue
= [NSValue valueWithCGSize:CGSizeMake(3,3)]; _anim.timingFunction
= [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut]; _anim.repeatCount
= CGFLOAT_MAX; _anim.autoreverses
= YES; [ui_View.layer
addAnimation:_anim forKey:nil]; CABasicAnimation
*_anim1 = [CABasicAnimation animationWithKeyPath: @"shadowOpacity" ]; _anim1.duration
= 1.f; _anim1.fromValue
= [NSNumber numberWithFloat:0.5]; _anim1.toValue
= [NSNumber numberWithFloat:1]; _anim1.timingFunction
= [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut]; _anim1.repeatCount
= CGFLOAT_MAX; _anim1.autoreverses
= YES; [ui_View.layer
addAnimation:_anim1 forKey:nil]; CABasicAnimation
*_anim2 = [CABasicAnimation animationWithKeyPath: @"shadowRadius" ]; _anim2.duration
= 1.f; _anim2.fromValue
= [NSNumber numberWithFloat:10]; _anim2.toValue
= [NSNumber numberWithFloat:5]; _anim2.timingFunction
= [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut]; _anim2.repeatCount
= CGFLOAT_MAX; _anim2.autoreverses
= YES; [ui_View.layer
addAnimation:_anim2 forKey:nil]; |
下面是一些应用
几个可以用来实现热门APP应用PATH中menu效果的几个方法 +(CABasicAnimation
*)opacityForever_Animation:( float )time
//永久闪烁的动画 { CABasicAnimation
*animation=[CABasicAnimation animationWithKeyPath: @"opacity" ]; animation.fromValue=[NSNumber
numberWithFloat:1.0]; animation.toValue=[NSNumber
numberWithFloat:0.0]; animation.autoreverses=YES; animation.duration=time; animation.repeatCount=FLT_MAX; animation.removedOnCompletion=NO; animation.fillMode=kCAFillModeForwards; return animation; } +(CABasicAnimation
*)opacityTimes_Animation:( float )repeatTimes
durTimes:( float )time;
//有闪烁次数的动画 { CABasicAnimation
*animation=[CABasicAnimation animationWithKeyPath: @"opacity" ]; animation.fromValue=[NSNumber
numberWithFloat:1.0]; animation.toValue=[NSNumber
numberWithFloat:0.4]; animation.repeatCount=repeatTimes; animation.duration=time; animation.removedOnCompletion=NO; animation.fillMode=kCAFillModeForwards; animation.timingFunction=[CAMediaTimingFunction
functionWithName:kCAMediaTimingFunctionEaseIn]; animation.autoreverses=YES; return animation; } +(CABasicAnimation
*)moveX:( float )time
X:(NSNumber *)x //横向移动 { CABasicAnimation
*animation=[CABasicAnimation animationWithKeyPath: @"transform.translation.x" ]; animation.toValue=x; animation.duration=time; animation.removedOnCompletion=NO; animation.fillMode=kCAFillModeForwards; return animation; } +(CABasicAnimation
*)moveY:( float )time
Y:(NSNumber *)y //纵向移动 { CABasicAnimation
*animation=[CABasicAnimation animationWithKeyPath: @"transform.translation.y" ]; animation.toValue=y; animation.duration=time; animation.removedOnCompletion=NO; animation.fillMode=kCAFillModeForwards; return animation; } +(CABasicAnimation
*)scale:(NSNumber *)Multiple orgin:(NSNumber *)orginMultiple durTimes:( float )time
Rep:( float )repeatTimes
//缩放 { CABasicAnimation
*animation=[CABasicAnimation animationWithKeyPath: @"transform.scale" ]; animation.fromValue=orginMultiple; animation.toValue=Multiple; animation.duration=time; animation.autoreverses=YES; animation.repeatCount=repeatTimes; animation.removedOnCompletion=NO; animation.fillMode=kCAFillModeForwards; return animation; } +(CAAnimationGroup
*)groupAnimation:(NSArray *)animationAry durTimes:( float )time
Rep:( float )repeatTimes
//组合动画 { CAAnimationGroup
*animation=[CAAnimationGroup animation]; animation.animations=animationAry; animation.duration=time; animation.repeatCount=repeatTimes; animation.removedOnCompletion=NO; animation.fillMode=kCAFillModeForwards; return animation; } +(CAKeyframeAnimation
*)keyframeAniamtion:(CGMutablePathRef)path durTimes:( float )time
Rep:( float )repeatTimes
//路径动画 { CAKeyframeAnimation
*animation=[CAKeyframeAnimation animationWithKeyPath: @"position" ]; animation.path=path; animation.removedOnCompletion=NO; animation.fillMode=kCAFillModeForwards; animation.timingFunction=[CAMediaTimingFunction
functionWithName:kCAMediaTimingFunctionEaseIn]; animation.autoreverses=NO; animation.duration=time; animation.repeatCount=repeatTimes; return animation; } +(CABasicAnimation
*)movepoint:(CGPoint )point //点移动 { CABasicAnimation
*animation=[CABasicAnimation animationWithKeyPath: @"transform.translation" ]; animation.toValue=[NSValue
valueWithCGPoint:point]; animation.removedOnCompletion=NO; animation.fillMode=kCAFillModeForwards; return animation; } +(CABasicAnimation
*)rotation:( float )dur
degree:( float )degree
direction:( int )direction
repeatCount:( int )repeatCount
//旋转 { CATransform3D
rotationTransform = CATransform3DMakeRotation(degree, 0, 0,direction); CABasicAnimation*
animation; animation
= [CABasicAnimation animationWithKeyPath: @"transform" ]; animation.toValue=
[NSValue valueWithCATransform3D:rotationTransform]; animation.duration=
dur; animation.autoreverses=
NO; animation.cumulative=
YES; animation.removedOnCompletion=NO; animation.fillMode=kCAFillModeForwards; animation.repeatCount=
repeatCount; animation. delegate =
self; return animation; } |