Zoom UILabel & Re-render font at correct size

Question

I have a multi-line UILabel that I want to enable zooming on.

I embedded it with a UIScrollView and set min zoom to .25 and max zoom to 4.

Answer 1

iOS 4+

- (void)scrollViewDidEndZooming:(UIScrollView *)scrollView withView:(UIView *)view atScale:(float)scale {
    scrollView.contentScaleFactor = scale;
    for (UIView *subview in scrollView.subviews) {
        subview.contentScaleFactor = scale;
    }
}

If this gets too intensive and performance is slow, just try setting the contentScaleFactor for only your labels.