gistfile1.m

- (void)tapAction:(UITapGestureRecognizer *)sender
{
    CATransform3D t = CATransform3DIdentity;
    t = CATransform3DRotate(t, -M_PI/6, 0, 0, 1);
    t = CATransform3DTranslate(t, 0, 200, 0);
   
    [CATransaction begin];
    [CATransaction setCompletionBlock:^(void) {
        [CATransaction begin];
        [CATransaction setValue:[NSNumber numberWithDouble:1] forKey:kCATransactionAnimationDuration];
        self.maskLayer.transform = CATransform3DIdentity;
        self.squareView.layer.transform = CATransform3DIdentity ;
        [CATransaction commit];
    }];
    [CATransaction setValue:[NSNumber numberWithDouble:1] forKey:kCATransactionAnimationDuration];
    self.maskLayer.transform = t;
    self.squareView.layer.transform = t;
    [CATransaction commit];
}