gistfile1.txt

@implementation UIView (Pulse)

- (void)pulseOnce
{
  [self pulse:NO];
}

- (void)pulse:(BOOL)repeats
{
  CGAffineTransform initialTransform = CGAffineTransformIdentity; // self.transform;
  [UIView animateWithDuration:0.2
                        delay:0.0
                      options:(repeats ? UIViewAnimationOptionRepeat : 0)
                   animations:^{
                     self.transform = CGAffineTransformConcat(initialTransform, CGAffineTransformMakeScale(1.05, 1.05));
                   }
                   completion:^(BOOL finished){
                     [UIView animateWithDuration:1/15.0
                                      animations:^{
                                        self.transform = CGAffineTransformConcat(initialTransform, CGAffineTransformMakeScale(0.9, 0.9));
                                      }
                                      completion:^(BOOL finished) {
                                        [UIView animateWithDuration:1/7.5
                                                         animations:^{
                                                           self.transform = initialTransform;
                                                         }
                                         ];
                                      }
                      ];
                   }
   ];
}

@end