Bar button item padding

gistfile1.m

- (void)setupBackButtonWithSelector:(SEL)selector {
  // create a custom button
  LIButton *backButton = [LIButton buttonWithType:UIButtonTypeCustom];
  backButton.positionInNavBar = LIButtonNavPositionLeft;
  // more back button setup
 
  // add back button to navigation bar
  UIBarButtonItem *backItem = [[UIBarButtonItem alloc] initWithCustomView:backButton];
  self.navigationItem.leftBarButtonItem = backItem;
}
 
/*! Position in navigation bar
 */
typedef enum LIButtonNavPosition {
  LIButtonNavPositionNone = 0,
  LIButtonNavPositionLeft,
  LIButtonNavPositionRight
} LIButtonNavPosition;
 
@interface LIButton : UIButton
/*! Position of button when used as Custom View in navigation bar.
 */
@property (nonatomic) LIButtonNavPosition positionInNavBar;
@end
@implementation LIButton
/*! Override and return insets based on location in navigation bar.
 */
- (UIEdgeInsets)alignmentRectInsets {
  if (LI_IS_IOS7_RUNTIME) {
    switch (self.positionInNavBar) {
      case LIButtonNavPositionLeft:
        return UIEdgeInsetsMake(0.0, 12.0, 0.0, 0.0);
        break;
      case LIButtonNavPositionRight:
        return UIEdgeInsetsMake(0.0, 0.0, 0.0, 12.0);
        break;
      default:
        return UIEdgeInsetsZero;
        break;
    }
  }
  return UIEdgeInsetsZero;
}
@end