backBarButtonItem的有木有响应事件？

Question

在当前页面上点击back会返回上一个页面,那么backBarButtonItem是不是有特定的响应事件？如果想在点击back的时候不仅想返回上一个页面还想做其他的工作，能否重写这个响应事件？具体该怎么做？不要用leftBarButtonItem代替backBarButtonItem

Answer 1

UIViewController+BackButtonHandler

The extension allows to handle UINavigationViewController's 'Back' button action.

Override this method in UIViewController derived class to handle 'Back' button click

-(BOOL)navigationShouldPopOnBackButton{
    ...
    return YES;
}