Imitation iOS icon shake

#import ""
#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:)];
  [ addGestureRecognizer:longPress];
}
-(void)longPress:(UILongPressGestureRecognizer*)longPress
{
  if (==UIGestureRecognizerStateBegan) {
    CAKeyframeAnimation* anim=[CAKeyframeAnimation animation];
    =@"";
    =@[@(angelToRandian(-7)),@(angelToRandian(7)),@(angelToRandian(-7))];
    =MAXFLOAT;
    =0.2;
    [ addAnimation:anim forKey:nil];
    =NO;
  }
}
- (IBAction)delete:(id)sender {
  [ removeFromSuperview];
  [ removeFromSuperview];
}
@end