iOS7 UI兼容 导航栏按钮边框 UINavigationItem left and right padding

		iOS7之前的UI为：
 

 
而在iOS7中，由于设计方面的原因，使得UI变为:
 
 
 
 

修改的方法重写UINavigationItem的setLeftBarButtonItem和setRightBarButtonItem方法，使之与之前版本兼容；
 
代码如下：
 
@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
 
 
 
项目源码不做任何修改，问题解决；
 
添加Button：
 
UIBarButtonItem *leftBarItem = [[UIBarButtonItem alloc] initWithCustomView:btnBack];
self.navigationItem.leftBarButtonItem = leftBarItem;
[leftBarItem release];
						
		
	

补充：移动开发 , IOS ,

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