iOS - Animating text size change in UILabel or UITextView?

Question

In an application showing chunks of text, I'm having the font size increase when the device is turned to a landscape orientation. I don't like how it does the whole animation and then suddenly jumps to the new size, so I'd like to animate the size change over the course of the rotation.

I read somewhere that throwing this change in a UIView animation block doesn't work because the font property is not animatable, so what are my options for doing this?

For my specific implementation I'm not simply scaling the UILabel/UITextView as-is; The bounds of the box is increasing more (proportionally) than the font-size, so there will be re-flow in the text. That's fine by me.

Answer 1

Change the font size when didAnimateFirstHalfOfRotationToInterfaceOrientation: is called. That way the user won't see the change once the rotation completed. It would be pretty hard to see the font size change then, as the rotation is happening!