Size a UIToolbar to fit its items?

Question

I'm trying to figure out a clean way to make a UIToolbar only as wide as it needs to be to fit the items that it contains. Is there a way to either:

• Configure the UIToolbar to adjust its width automatically as its items are changed?
• Programatically determine the minimum width required by the items, which can then be used to set the UIToolbar's frame?

I haven't been able to figure this out due to the spacing between the items and the fact that UIBarButtonItems are not UIView subclasses.

Answer 1

After trying some suggestions from other answers that did not work unless I used custom views, or unless everything was loaded, I finally arrived at a way to set the toolbar width based on its items:

//Add bar items to toolbar first.

UIView* v = toolbar.subviews.lastObject;
float newWidth = v.frame.origin.x + v.frame.size.width;

//Set toolbar width

You'll need to override UIToolbar -setItems: or otherwise detect changed buttons to autoresize.

I have included this feature in my refactoring library, es_ios_utils, to set a navigation item's right item with multiple buttons. In the preceding link, see UIToolbar +toolbarWithItems: and UINavigationItem -setRightBarButtonItems.