如何知道用户是否更改了标签？

Question

I have a Tab Bar Controller which has some Navigation Controllers as children. 我有一个Tab Bar Controller ，其中有一些Navigation Controllers作为子级。 Is it possible to find out when a user navigated away from certain Navigation Controller (as he switched to another tab) in form of a callback? 是否可以找出用户何时以回调形式离开某个Navigation Controller （当他切换到另一个选项卡时）？

Answer 1

Whichever class is the Tab Bar Controller's delegate will get sent the following selectors: Tab Bar控制器的代表是哪个类，将向其发送以下选择器：

- (BOOL)tabBarController:(UITabBarController *)tabBarController shouldSelectViewController:(UIViewController *)viewController
- (void)tabBarController:(UITabBarController *)tabBarController didSelectViewController:(UIViewController *)viewController

如何知道用户是否更改了标签？

问题描述

1 个解决方案

解决方案1
0 2016-01-24 16:56:25

如何知道用户是否更改了标签？

问题描述

1 个解决方案

解决方案1 0 2016-01-24 16:56:25

解决方案1
0 2016-01-24 16:56:25