ios7 barbuttonitem 适配

bar.m

@interface UINavigationItem (margin)
 
@end
 
@implementation UINavigationItem (margin)
#if __IPHONE_OS_VERSION_MAX_ALLOWED > __IPHONE_6_1
- (void)setLeftBarButtonItem:(UIBarButtonItem *)_leftBarButtonItem
{
    UIBarButtonItem *spaceButtonItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFixedSpace target:nil action:nil];
    spaceButtonItem.width = -12;
    
    if (_leftBarButtonItem)
    {
        [self setLeftBarButtonItems:@[spaceButtonItem, _leftBarButtonItem]];
    }
    else
    {
        [self setLeftBarButtonItems:@[spaceButtonItem]];
    }
    [spaceButtonItem release];
}
 
- (void)setRightBarButtonItem:(UIBarButtonItem *)_rightBarButtonItem
{
    UIBarButtonItem *spaceButtonItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFixedSpace target:nil action:nil];
    spaceButtonItem.width = -12;
    
    if (_rightBarButtonItem)
    {
        [self setRightBarButtonItems:@[spaceButtonItem, _rightBarButtonItem]];
    }
    else
    {
        [self setRightBarButtonItems:@[spaceButtonItem]];
    }
    [spaceButtonItem release];
}
#endif
 
@end