ios核心动画之图片抖动

 1 #import "NJViewController.h"
 2
 3 #define angle2Radian(angle) ((angle) / 180.0 * M_PI)
 4
 5 @interface NJViewController ()
 6
 7 @property (weak, nonatomic) IBOutlet UIImageView *iconView;
 8 @end
 9
10 @implementation NJViewController
11
12 - (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
13 {
14     // 1.创建核心动画
15     CAKeyframeAnimation  *keyAnima = [CAKeyframeAnimation animation];
16     keyAnima.keyPath = @"transform.rotation";
17     // 度数 / 180 * M_PI
18     keyAnima.values = @[@(-angle2Radian(4)), @(angle2Radian(4)), @(-angle2Radian(4))];
19
20     keyAnima.removedOnCompletion = NO;
21     keyAnima.fillMode = kCAFillModeForwards;
22     keyAnima.duration = 0.1;
23
24     // 设置动画重复的次数
25     keyAnima.repeatCount = MAXFLOAT;
26
27     // 2.添加核心动画
28     [self.iconView.layer addAnimation:keyAnima forKey:nil];
29 }
30
31 @end