仿iOS图标抖动

#import "LHViewController.h"#define angelToRandian(x) ((x)/180.0*M_PI)@interface LHViewController ()@property (strong, nonatomic) IBOutlet UIImageView *imageView;@end@implementation LHViewController- (void)viewDidLoad{ [super viewDidLoad]; // Do any additional setup after loading the view, typically from a nib. UILongPressGestureRecognizer* longPress=[[UILongPressGestureRecognizer alloc]initWithTarget:self action:@selector(longPress:)]; [self.imageView addGestureRecognizer:longPress];}-(void)longPress:(UILongPressGestureRecognizer*)longPress{ if (longPress.state==UIGestureRecognizerStateBegan) { CAKeyframeAnimation* anim=[CAKeyframeAnimation animation]; anim.keyPath=@"transform.rotation"; anim.values=@[@(angelToRandian(-7)),@(angelToRandian(7)),@(angelToRandian(-7))]; anim.repeatCount=MAXFLOAT; anim.duration=0.2; [self.imageView.layer addAnimation:anim forKey:nil]; self.btn.hidden=NO; }}- (IBAction)delete:(id)sender { [self.imageView removeFromSuperview]; [self.btn removeFromSuperview];}@end

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