ios7 自定义UINavigationBar UIBarButtonItem 10px的偏移纠正

How to Edit Empty Spaces of Left, Right UIBarButtonItem in UINavigationBar in iOS 7

最早的答案应该是在这里找到的：

link：http://stackoverflow.com/questions/18914812/how-to-edit-empty-spaces-of-left-right-uibarbuttonitem-in-uinavigationbar-in-io


然后，然后

在code4app上也有一些最先找到这个答案的人截了一段-> 如下答案~！

link:

做法是一样的。

原理看完之后都会觉得很简单，但是佩服第一个解决这个问题的人！

尽情效仿！

- ( void )addLeftBarButtonItem:( UIBarButtonItem *)leftBarButtonItem
{
    UIBarButtonItem *negativeSpacer = [[ UIBarButtonItem alloc ] initWithBarButtonSystemItem : UIBarButtonSystemItemFixedSpace target :nil action :nil ];
    if ([[[ UIDevice currentDevice ] systemVersion ] floatValue ] >= 7 .0 ) {
        // Add a negative spacer on iOS >= 7.0
        negativeSpacer .width = - 1 0 ;
    } else {
        // Just set the UIBarButtonItem as you would normally
        negativeSpacer .width = 0 ;
        [ self setLeftBarButtonItem :leftBarButtonItem];
    }
    [ self setLeftBarButtonItems :[ NSArray arrayWithObjects :negativeSpacer, leftBarButtonItem, nil ]];
}

- ( void )addRightBarButtonItem:( UIBarButtonItem *)rightBarButtonItem
{
    UIBarButtonItem *negativeSpacer = [[ UIBarButtonItem alloc ]
                                      initWithBarButtonSystemItem :UIBarButtonSystemItemFixedSpace
                                      target :nil action :nil ];
    if ([[[ UIDevice currentDevice ] systemVersion ] floatValue ] >= 7 .0 ) {

        negativeSpacer .width = - 1 0 ;

    } else {
        negativeSpacer .width = 0 ;
    }
    [ self setRightBarButtonItems :[ NSArray arrayWithObjects :negativeSpacer, rightBarButtonItem, nil ]];
}