Open Radar

 
Summary:

UIScrollView -[zoomToRect: animated:] method is broken. If scrollView is already at zoomScale that -[zoomToRect: animated:] will result, block based animation is broken - i.e. not called.

Steps to Reproduce:

1. Zoom UIScrollView to maximumScaleFactor.
2. Call zoomToRect wrapped in UIView block based animation with such CGRect that it will zoom to maximumScaleFactor.

Expected Results:

If call to zoomToRect is wrapped in animation block (e.g. [UIView animateWithDuration:0.85 animations:^{ [self.scrollView zoomToRect: rect animated: NO];}], I expect the animation to take 0.85 seconds.

Actual Results:

Animation block is disregarded and animation takes usual amount of time (which is WAY TO SHORT to be useful in many cases).

Regression:

Notes:

There's quite simple workaround, just change zoomScaleFactor to something teeny tiny bit smaller, i.e decrease it by 0.00001f, but that's obviously not TheRightWay.