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.

Edit: I would be fine with simply scaling the UITextView.

Also, I was considering “animating” it manually: I have a method that lays out my views and adjusts for font size. If I knew when the rotation was about to start, and the duration of the animation, I could time it so it renders an intermediate font size or two in the middle of the animation. Any help with getting those would be appreciated.

Answer 1

If I knew when the rotation was about
to start, and the duration of the
animation…

Funny you should mention that. Just before the animation starts, your view controller will receive a willAnimateRotationToInterfaceOrientation:duration: message that gives you the exact information you need.