What's UIBarButtonItem's possibleTitles for?

Question

In UIKit, UIBarButtonItem has a property called possibleTitles. How is that being used?

Answer 1

I looked at the documentation and it said that it was referenced in the AccelerometerGraph demo. So I took a look at the demo.

It looks like before you add it to the bar, you can set the possibleTitles property to a set of strings that the button may display. I assume that this is so that the button takes the width of the widest string, so when you change the title the width of the button doesn't change.