How to scale a view without CGAffineTransform

Question

I need to scale a view with UIPinchGestureRecognizer but without CGAffineTransform, so how to change this code to do it without CGAffineTransform?

- (IBAction)zoomma:(UIGestureRecognizer *)sender {

    CGFloat factor = [(UIPinchGestureRecognizer *)sender scale];
    if (factor > 1) {
        self.sgungaView.transform = CGAffineTransformMakeScale(lastScaleFactor + (factor-1), lastScaleFactor + (factor-1));
    } else {
        self.sgungaView.transform = CGAffineTransformMakeScale(lastScaleFactor * factor, lastScaleFactor * factor);
    }

    if (sender.state == UIGestureRecognizerStateEnded) { 
        if (factor > 1) {
            lastScaleFactor += (factor-1); 
        } else {
            lastScaleFactor *= factor;
        }
    }
}

Edit:

Not a masterpiece but this works

- (void)zoomma:(UIGestureRecognizer *)sender {

    CGFloat factor = [(UIPinchGestureRecognizer *)sender scale];
    if (factor > 1) {
        float enlarge = lastScaleFactor + (factor-1);
        [self.sgungaView setBounds:CGRectMake(0, 0, self.sgungaView.bounds.size.height + enlarge, self.sgungaView.bounds.size.height + enlarge)];
    } else {
        float stringi = lastScaleFactor * factor;
        [self.sgungaView setBounds:CGRectMake(0, 0, self.sgungaView.bounds.size.height - stringi, self.sgungaView.bounds.size.height - stringi)];
    }

    if (sender.state == UIGestureRecognizerStateEnded) { 
        if (factor > 1) {
            lastScaleFactor += (factor-1); 
        } else {
            lastScaleFactor *= factor;
        }
    }
}

there's a better way?

Answer 1

You can add an UIScrollView to your view and add your elements (the elements of your view) to the UIScrollView. Then you can use the zoom delegete from UIScrollView to zoom.

This works well for me.