How to right or center align the UIToolBar items

create  buttons like this 

UIBarButtonItem *flexibleSpace = [[UIBarButtonItem alloc] 

              initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace 

              target:nil action:nil];

Add  UIBarButtonSystemItemFlexibleSpace items to your toolbar, to the left and right of your items OR left to get the center align OR right align