How to adjust UIToolBar left and right padding

Question

I create one UIToolbar with code and another with interface builder. But, found out the two toolbar having different left and right padding which shown below:

From I

Answer 1

use this button

UIBarButtonItem *spaceItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace
                                                                           target:nil
                                                                           action:nil];