Question

I’m trying to change the text shadow position of my UISegmentedControl. To do this, the documentation says I need to pass in an NSValue which wraps a UIOffset struct.

UITextAttributeTextShadowOffset
    Key to the offset used for the text shadow in a text attributes dictionary.
    The corresponding value is an instance of NSValue wrapping a UIOffset struct.
    Available in iOS 5.0 and later.
    Declared in UIStringDrawing.h.

The problem is NSValue has no such wrapper method for a UIOffset struct – just search the documentation. I saw a lot of sample code use this nonexistent function.

[NSValue valueWithUIOffset:UIOffsetMake(0, 1)]

It crashes when I try to run it. I don’t understand how so many sample code can run it.

Answer 1

Check out the NSValue UIKit Additions, a Category that, among other useful things, adds the -[NSValue valueWithUIOffset:] method you’re after.