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zz CABasicAnimation的使用方法

CABasicAnimation类的使用方式就是基本的关键帧动画。

所谓关键帧动画,就是将Layer的属性作为KeyPath来注册,指定动画的起始帧和结束帧,然后自动计算和实现中间的过渡动画的一种动画方式。

 

CABasicAnimation的基本使用顺序

1.引用QuartzCore.framework

将"QuartzCore.framework"这个库添加到项目中。并且在需要使用CABaseAnimation类的地方import头文件。

 

[objc] view plaincopy在CODE上查看代码片派生到我的代码片
 
  1. #import <QuartzCore/QuartzCore.h>  


2.CABaseAnimation的实例化以及关键路径的注册

 

使用"animationWithKeyPath:"方法进行CABasicAnimation的实例化,并指定Layer的属性作为关键路径来注册。

 

[objc] view plaincopy在CODE上查看代码片派生到我的代码片
 
  1. // 指定position属性  
  2. CABasicAnimation *animation =  
  3.     [CABasicAnimation animationWithKeyPath:@"position"];  

 

3.设定动画

 

设定动画的属性。以下是属性及其对应的说明:

 

属性说明
duration动画时长(秒为单位)(注:此处与原文有出入)
repeatCount重复次数。永久重复的话设置为HUGE_VALF。
beginTime指定动画开始时间。从开始指定延迟几秒执行的话,请设置为
「CACurrentMediaTime() + 秒数」的形式。
timingFunction设定动画的速度变化
autoreverses动画结束时是否执行逆动画

例:

 

 

[objc] view plaincopy在CODE上查看代码片派生到我的代码片
 
  1. animation.duration = 2.5; // 动画持续时间  
  2. animation.repeatCount = 1; // 不重复  
  3. animation.beginTime = CACurrentMediaTime() + 2; // 2秒后执行  
  4. animation.autoreverses = YES; // 结束后执行逆动画  
  5.    
  6. // 动画先加速后减速  
  7. animation.timingFunction =  
  8.     [CAMediaTimingFunction functionWithName: kCAMediaTimingFunctionEaseInEaseOut];  

 

4.设定动画的开始帧和结束帧

设定动画开始和结束帧时的状态。设定的值会变为KeyPath所指定的属性的值。

 

 

属性说明
fromValue开始值
toValue终了值(絶対値)
byValue终了值(相对值)

例:

 

 

[objc] view plaincopy在CODE上查看代码片派生到我的代码片
 
  1. // 指定position属性(移动)  
  2. CABasicAnimation *animation =  
  3.     [CABasicAnimation animationWithKeyPath:@"position"];  
  4.    
  5. ???  
  6.    
  7. // 设定动画起始帧和结束帧  
  8. animation.fromValue = [NSValue valueWithCGPoint:CGPointMake(0, 0)]; // 起始点  
  9. animation.toValue = [NSValue valueWithCGPoint:CGPointMake(320, 480)]; // 终了点  

 

5.添加动画

 

为Layer添加设置完成的动画,可以给Key指定任意名字。

 

[objc] view plaincopy在CODE上查看代码片派生到我的代码片
 
  1. [myView.layer addAnimation:animation forKey:@"move-layer"];  

 

其他.动画结束后回到初始状态的现象的解决方法

 

用CABasicAnimation执行动画,在动画结束后会回归动画开始前的状态。想要解决的话,必须设置“removedOnCompletion”和“fillMode”这两个属性。

 

[objc] view plaincopy在CODE上查看代码片派生到我的代码片
 
  1. // 动画终了后不返回初始状态  
  2. animation.removedOnCompletion = NO;  
  3. animation.fillMode = kCAFillModeForwards;  

 

CABasicAnimation的使用示例

 

实际上CABasicAnimation有很多种使用方法,以下将一一列举。

 

移动动画

移动动画的代码如下:

 

[objc] view plaincopy在CODE上查看代码片派生到我的代码片
 
  1. /* 移动 */  
  2. CABasicAnimation *animation = [CABasicAnimation animationWithKeyPath:@"position"];  
  3.    
  4. // 动画选项的设定  
  5. animation.duration = 2.5; // 持续时间  
  6. animation.repeatCount = 1; // 重复次数  
  7.    
  8. // 起始帧和终了帧的设定  
  9. animation.fromValue = [NSValue valueWithCGPoint:myView.layer.position]; // 起始帧  
  10. animation.toValue = [NSValue valueWithCGPoint:CGPointMake(320, 480)]; // 终了帧  
  11.    
  12. // 添加动画  
  13. [myView.layer addAnimation:animation forKey:@"move-layer"];  

 

 

旋转动画

旋转动画的代码如下:

 

[objc] view plaincopy在CODE上查看代码片派生到我的代码片
 
  1. /* 旋转 */  
  2.    
  3. // 对Y轴进行旋转(指定Z轴的话,就和UIView的动画一样绕中心旋转)  
  4. CABasicAnimation *animation = [CABasicAnimation animationWithKeyPath:@"transform.rotation.y"];  
  5.    
  6. // 设定动画选项  
  7. animation.duration = 2.5; // 持续时间  
  8. animation.repeatCount = 1; // 重复次数  
  9.    
  10. // 设定旋转角度  
  11. animation.fromValue = [NSNumber numberWithFloat:0.0]; // 起始角度  
  12. animation.toValue = [NSNumber numberWithFloat:22 * M_PI]; // 终止角度  
  13.    
  14. // 添加动画  
  15. [myView.layer addAnimation:animation forKey:@"rotate-layer"];  

 

缩放动画

缩放动画的代码如下:

 

 

[objc] view plaincopy在CODE上查看代码片派生到我的代码片
 
  1. /* 放大缩小 */  
  2.    
  3. // 设定为缩放  
  4. CABasicAnimation *animation = [CABasicAnimation animationWithKeyPath:@"transform.scale"];  
  5.    
  6. // 动画选项设定  
  7. animation.duration = 2.5; // 动画持续时间  
  8. animation.repeatCount = 1; // 重复次数  
  9. animation.autoreverses = YES; // 动画结束时执行逆动画  
  10.    
  11. // 缩放倍数  
  12. animation.fromValue = [NSNumber numberWithFloat:1.0]; // 开始时的倍率  
  13. animation.toValue = [NSNumber numberWithFloat:2.0]; // 结束时的倍率  
  14.    
  15. // 添加动画  
  16. [myView.layer addAnimation:animation forKey:@"scale-layer"];  

 

组合动画

 

使用CAAnimationGroup类进行复数动画的组合。代码如下:

 

[objc] view plaincopy在CODE上查看代码片派生到我的代码片
 
  1. /* 动画1(在X轴方向移动) */  
  2. CABasicAnimation *animation1 =  
  3.     [CABasicAnimation animationWithKeyPath:@"transform.translation.x"];  
  4.    
  5. // 终点设定  
  6. animation1.toValue = [NSNumber numberWithFloat:80];; // 終点  
  7.    
  8.    
  9. /* 动画2(绕Z轴中心旋转) */  
  10. CABasicAnimation *animation2 =  
  11.     [CABasicAnimation animationWithKeyPath:@"transform.rotation.z"];  
  12.    
  13. // 设定旋转角度  
  14. animation2.fromValue = [NSNumber numberWithFloat:0.0]; // 开始时的角度  
  15. animation2.toValue = [NSNumber numberWithFloat:44 * M_PI]; // 结束时的角度  
  16.    
  17.    
  18. /* 动画组 */  
  19. CAAnimationGroup *group = [CAAnimationGroup animation];  
  20.    
  21. // 动画选项设定  
  22. group.duration = 3.0;  
  23. group.repeatCount = 1;  
  24.    
  25. // 添加动画  
  26. group.animations = [NSArray arrayWithObjects:animation1, animation2, nil nil];  
  27. [myView.layer addAnimation:group forKey:@"move-rotate-layer"];  

 

捕获动画开始时和终了时的事件

 

博主:设定委托对象,实现委托方法,如下:

 

[objc] view plaincopy在CODE上查看代码片派生到我的代码片
 
  1. /* 移动 */  
  2. CABasicAnimation *animation = [CABasicAnimation animationWithKeyPath:@"transform.translation.y"];  
  3. animation.delegate = self; // 指定委托对象  
  4.    
  5. // 设定动画选项  
  6. animation.duration = 2.5; // 动画时长  
  7. animation.repeatCount = 1; // 重复次数  
  8.    
  9. // 终点设定  
  10. animation.toValue = [NSNumber numberWithFloat:100];; // 终点  
  11.    
  12. // 添加动画  
  13. [myView.layer addAnimation:animation forKey:@"move-layer"];  
  14.    
  15. ???  
  16.    
  17. /** 
  18.  * 动画开始时 
  19.  */  
  20. - (void)animationDidStart:(CAAnimation *)theAnimation  
  21. {  
  22.     NSLog(@"begin");  
  23. }  
  24.    
  25. /** 
  26.  * 动画结束时 
  27.  */  
  28. - (void)animationDidStop:(CAAnimation *)theAnimation finished:(BOOL)flag  
  29. {  
  30.     NSLog(@"end");  
  31. }  

 

CABasicAnimation使用时候的注意点

 

CABasicAnimation正在进行动画的时候,点击了Home按钮后再回到app的时候,动画会被清空。

 

Objective-C的示例程序

使用CABasicAnimation实现关键帧动画的示例程序如下:

 

[objc] view plaincopy在CODE上查看代码片派生到我的代码片
 
    1. - (void)viewDidLoad  
    2. {  
    3.     [super viewDidLoad];  
    4.    
    5.     // 图像显示  
    6.     UIImage *image = [UIImage imageNamed:@"image01.png"];  
    7.     UIImageView *imageView = [[UIImageView alloc]initWithImage:image];  
    8.     imageView.center = CGPointMake(160, 240);  
    9.     [self.view addSubview:imageView];  
    10.    
    11.    
    12.     /* 移动 */  
    13.     CABasicAnimation *animation1 =  
    14.         [CABasicAnimation animationWithKeyPath:@"transform.translation.y"];  
    15.    
    16.     // 起止点的设定  
    17.     animation1.toValue = [NSNumber numberWithFloat:100];; // 終点  
    18.    
    19.    
    20.     /* 旋转 */  
    21.     CABasicAnimation *animation2 =  
    22.         [CABasicAnimation animationWithKeyPath:@"transform.rotation.x"];  
    23.    
    24.     // 绕x轴转3圈  
    25.     animation2.toValue = [NSNumber numberWithFloat:66 * M_PI]; // 结束时的角度  
    26.    
    27.    
    28.     /* 动画组 */  
    29.     CAAnimationGroup *group = [CAAnimationGroup animation];  
    30.     group.delegate = self;  
    31.     group.duration = 5.0;  
    32.     group.repeatCount = 1;  
    33.    
    34.     // 动画结束后不变回初始状态  
    35.     group.removedOnCompletion = NO;  
    36.     group.fillMode = kCAFillModeForwards;  
    37.    
    38.     // 添加动画  
    39.     group.animations = [NSArray arrayWithObjects:animation1, animation2, nil nil];  
    40.     [imageView.layer addAnimation:group forKey:@"move-rotate-layer"];  
    41. }  
    42.    
    43.    
    44. /** 
    45.  * 动画开始时 
    46.  */  
    47. - (void)animationDidStart:(CAAnimation *)theAnimation  
    48. {  
    49.     NSLog(@"begin");  
    50. }  
    51.    
    52. /** 
    53.  * 动画结束时 
    54.  */  
    55. - (void)animationDidStop:(CAAnimation *)theAnimation finished:(BOOL)flag  
    56. {  
    57.     NSLog(@"end");  
    58. }  

CABasicAnimation animationWithKeyPath 一些规定的值

CABasicAnimation animationWithKeyPath Types

When using the ‘CABasicAnimation’ from the QuartzCore Framework in Objective-C, you have to specify an animationWithKeyPath.  This is a long string and is not easily listed in the CABasicAnimation, CAPropertyAnimation, or the CAAnimation class.  I ended up finding a handy chart within the Core Animation Programming guide in Apple’s iPhone OS Reference Library.  Hope this helps save someone time, at least it will for me.

 

 

 

CABasicAnimation *theAnimation;theAnimation=[CABasicAnimation animationWithKeyPath:@"transform.translation.y"];theAnimation.delegate = self;theAnimation.duration = 1;theAnimation.repeatCount = 0;theAnimation.removedOnCompletion = FALSE;theAnimation.fillMode = kCAFillModeForwards;theAnimation.autoreverses = NO;theAnimation.fromValue = http://www.mamicode.com/[NSNumber numberWithFloat:0];"animateLayer"];
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我们可以通过animationWithKeyPath键值对的方式来改变动画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 marginzPosition backgroundColor cornerRadiusborderWidth boundscontentscontentsRectcornerRadiusframehiddenmaskmasksToBoundsopacitypositionshadowColorshadowOffsetshadowOpacityshadowRadius[self. ui_View.layer removeAllAnimations];        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 = http://www.mamicode.com/[NSNumber numberWithFloat:.8];"bounds"];    anim.duration = 1.f;    anim.fromValue = http://www.mamicode.com/[NSValue valueWithCGRect:CGRectMake(0,0,10,10)];"cornerRadius"];    anim2.duration = 1.f;    anim2.fromValue = http://www.mamicode.com/[NSNumber numberWithFloat:0.f];"cornerRadius"];//contents CABasicAnimation *anim = [CABasicAnimation animationWithKeyPath:@"contents"];    anim.duration = 1.f;    anim.fromValue = http://www.mamicode.com/(id)[UIImage imageNamed:@"1.jpg"].CGImage;    anim.toValue = http://www.mamicode.com/(id)[UIImage imageNamed:@"2.png"].CGImage;//    anim.byValue  = http://www.mamicode.com/(id)[UIImage imageNamed:@"3.png"].CGImage;//    anim.toValue = http://www.mamicode.com/(id)[UIColor redColor].CGColor;"shadowColor"];    anim.duration = 1.f;    anim.toValue = http://www.mamicode.com/(id)[UIColor redColor].CGColor;"shadowOffset"];    _anim.duration = 1.f;    _anim.fromValue = http://www.mamicode.com/[NSValue valueWithCGSize:CGSizeMake(0,0)];"shadowOpacity"];    _anim1.duration = 1.f;    _anim1.fromValue = http://www.mamicode.com/[NSNumber numberWithFloat:0.5];"shadowRadius"];    _anim2.duration = 1.f;    _anim2.fromValue = http://www.mamicode.com/[NSNumber numberWithFloat:10];>
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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=http://www.mamicode.com/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=http://www.mamicode.com/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=http://www.mamicode.com/orginMultiple;

    animation.toValue=http://www.mamicode.com/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= http://www.mamicode.com/[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;

}

 

 

 

 

 

实现view放大再缩小的效果

- (void)viewDidLoad {    [super viewDidLoad];layer=[CALayer layer];layer.frame=CGRectMake(50, 200, 50, 50);layer.backgroundColor=[UIColor orangeColor].CGColor;layer.cornerRadius=8.0f;CABasicAnimation *animation=[CABasicAnimation animationWithKeyPath:@"transform.translation.y"];animation.duration=4.0f;animation.autoreverses=NO;animation.repeatCount=1;animation.toValue=http://www.mamicode.com/[NSNumber numberWithInt:-10];"transform.scale"];animationZoomIn.duration=2.0f;animationZoomIn.autoreverses=NO;animationZoomIn.repeatCount=1;animationZoomIn.toValue=http://www.mamicode.com/[NSNumber numberWithFloat:1.56];"transform.scale"];animationZoomOut.beginTime=2.0f;animationZoomOut.duration=2.0f;animationZoomOut.autoreverses=NO;animationZoomOut.repeatCount=1;animationZoomOut.toValue=http://www.mamicode.com/[NSNumber numberWithFloat:.01];>

zz CABasicAnimation的使用方法