iOS 核心动画 - 图标抖动

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实现效果:

实现技术过程:

#import"SHViewController.h"

#define ANGLE_TO_RADIAN(angle) ((angle)/180.0* M_PI)

@interfaceSHViewController()

//图标

@property(weak,nonatomic)IBOutletUIImageView*iconView;

//开点按钮

- (IBAction)start;

//结束按钮

- (IBAction)end;

@end

@implementationCZViewController

- (void)viewDidLoad

{

[superviewDidLoad];

}

//开点按钮功能呢

- (IBAction)start {

//实例化

CAKeyframeAnimation*anim = [CAKeyframeAnimationanimation];

//拿到动画key

anim.keyPath=@"transform.rotation";

//动画时间

anim.duration=.25;

//重复的次数

//anim.repeatCount = 16;

//无限次重复

anim.repeatCount=MAXFLOAT;

//设置抖动数值

anim.values=@[@(ANGLE_TO_RADIAN(-5)),@(ANGLE_TO_RADIAN(5)),@(ANGLE_TO_RADIAN(-5))];

//保持最后的状态

anim.removedOnCompletion=NO;

//动画的填充模式

anim.fillMode=kCAFillModeForwards;

//layer层实现动画

[self.iconView.layeraddAnimation:animforKey:@"shake"];

}

//点击结束按钮

- (IBAction)end {

//图标

[self.iconView.layerremoveAnimationForKey:@"shake"];

}

@end