头像抖动

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

#import "ViewController.h"

@interface ViewController ()

@property (nonatomic,strong) UIImageView *imageView;
@property (nonatomic,strong) CAKeyframeAnimation *anim;

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    
    [self.view addSubview:self.imageView];
}

- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event {
    [self.imageView.layer addAnimation:self.anim forKey:nil];
}

- (CAKeyframeAnimation *)anim {//可以根据路径做动画
    if (!_anim) {
        _anim = [CAKeyframeAnimation animation];
        _anim.keyPath = @"transform.rotation";
        _anim.values = @[@(angleToRadian(-5)),@(angleToRadian(5)),@(angleToRadian(-5))];//进行多个值之间的动画
        _anim.repeatCount = 5;//MAXFLOAT
        _anim.autoreverses = YES;
        _anim.duration = 0.1;
    }
    return _anim;
}

///创建UIImageView
- (UIImageView *)imageView {
    if (!_imageView) {
        _imageView = [[UIImageView alloc] init];
        _imageView.frame = CGRectMake(100, 150, 50, 50);
        _imageView.contentMode = UIViewContentModeScaleAspectFit;
        _imageView.backgroundColor = [[UIColor redColor] colorWithAlphaComponent:0.6];
        _imageView.image = [UIImage imageNamed:@"zrx4.jpg"];
        _imageView.layer.cornerRadius = 5;
        _imageView.layer.masksToBounds = YES;
    }
    return _imageView;
}

@end