在NavigationBar中按下后退按钮时会发生什么 [英] What happens when back button is pressed in navigationBar

问题描述

我想知道当在navigationBar上按下后退按钮时会调用什么函数.

I wonder what is the function is called when the back button is pressed on the navigationBar.

我想在按下按钮时添加一些功能，谁知道呢?

I want to add some functionality when the button is pressed, who knows it?

预先感谢

推荐答案

所需的功能位于UINavigationBarDelegate协议中.实现-navigationBar:shouldPopItem:方法，并将您的类设置为相关导航栏的delegate.

The functionality you want is in the UINavigationBarDelegate protocol. Implement the -navigationBar:shouldPopItem: method and set your class as the delegate of the navigation bar in question.

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