//UIImageRenderingModeAlwaysTemplate Always draw the image as a template image, ignoring its color information
UIImage *syncImage = [self.syncImageView.image imageWithRenderingMode:UIImageRenderingModeAlwaysTemplate];
    self.syncImageView.image = syncImage;

    [UIView animateWithDuration:3.0f
                          delay:0.0
 
f
                        options:(UIViewAnimationOptionRepeat | UIViewAnimationOptionAllowUserInteraction | UIViewAnimationOptionAutoreverse | UIViewAnimationOptionBeginFromCurrentState)
                     animations:^{
                         self.syncImageView.tintColor = [UIColor orangeColor];
                     } completion:^(BOOL
 
 finished){
                         self.syncImageView.tintColor = [UIColor lightGrayColor];
                     }];