我同意ElJay的评论，但要使用UITabBarControllerDelegate来回答问题

I agree with ElJay comment, but to answer the question use UITabBarControllerDelegate

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

在选择一个新选项卡时，请查看当前选项卡是否为tabBarController的选项卡1 selectedIndex属性，如果是，则为popToRootViewController:

when a new tab is selected see if the current one is tab 1 selectedIndex property of tabBarController and if so popToRootViewController: