UIToolbar UIBarButtonItem Alignment question

Question

I need to create a UIToolbar that has two UIBarButtonItems. The 1st button must be centered and the 2nd item must be right aligned.

I understand and use Flexible spacing and it works great when I need to balance buttons across the UIToolbar, but with only two buttons, I can't seem to perfectly center the middle button. I've even initialized the view.toolbarItems array with

NSArray *items = [[NSArray alloc] initWithObjects:fixed, flex, center_button, flex, right_button, nil];

and set fixed.width = right_button.width ... but still, the center_button is never perfectly centered.

Answer 1

I had the same problem recently and solved it by creating a sort of fake UIBarButtonItem. The key in getting the alignment right was to set the possibleTitles property of both left and right bar buttons to the same value, for example:

[right_button setPossibleTitles:[NSSet setWithObject:@"Abc"]];

// Create this fake (plain) button item on the left, to correct the alignment.
UIBarButtonItem *fake = [[[UIBarButtonItem alloc] initWithTitle:@"" style:UIBarButtonItemStylePlain target:nil action:nil] autorelease];
[fake setEnabled:NO];
[fake setPossibleTitles:right_button.possibleTitles];

// The array for your toolbar items
NSArray *items = [[NSArray alloc] initWithObjects:fake, flex, center_button, flex, right_button, nil];

Late answer... I hope this can still help.