iOS7 leftBarButton 和rightBarButton的位置偏差

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
{
if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 7.0)
{
UIBarButtonItem *negativeSeperator = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFixedSpace target:nil action:nil];
negativeSeperator.width = -12;

if (_leftBarButtonItem)
{
[self setLeftBarButtonItems:@[negativeSeperator, _leftBarButtonItem]];
}
else
{
[self setLeftBarButtonItems:@[negativeSeperator]];
}
[negativeSeperator release];
}
else
{
[self setLeftBarButtonItem:_leftBarButtonItem animated:NO];
}
}

- (void)setRightBarButtonItem:(UIBarButtonItem *)_rightBarButtonItem
{
if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 7.0)
{
UIBarButtonItem *negativeSeperator = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFixedSpace target:nil action:nil];
negativeSeperator.width = -12;

if (_rightBarButtonItem)
{
[self setRightBarButtonItems:@[negativeSeperator, _rightBarButtonItem]];
}
else
{
[self setRightBarButtonItems:@[negativeSeperator]];
}
[negativeSeperator release];
}
else
{
[self setRightBarButtonItem:_rightBarButtonItem animated:NO];
}
}

#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];

PS：是真的什么都不需要改动的

博文地址：http://www.cnblogs.com/maxfong/p/3375167.html