不同的UITabbar按钮

Question

我的问题是关于UITabbarcontroller。 我有一个UInavigation控制器和一个UITabbarcontroller都在我的Appdelegate中声明。但是，我希望我的标签栏按钮更改当我的UIViewController由NavigationController更改。

SettingsViewController *sett = [[SettingsViewController alloc]init]; 

self.navigationController = [[UINavigationController alloc]init]; 
[self.navigationController.navigationBar setTranslucent:NO]; 
[self.navigationController.navigationBar setTintColor:[UIColor blackColor]]; 
self.navigationController.viewControllers = [NSArray arrayWithObject:viewController1]; 

self.tabBarController = [[UITabBarController alloc] init]; 
self.tabBarController.viewControllers = [NSArray arrayWithObjects:self.navigationController,sett, nil]; 

self.window.rootViewController = self.tabBarController; 

如何做到这一点？

Answer 1

使用UINavigationControllerDelegate

@interface SettingsViewController : UIViewController <UINavigationControllerDelegate> 

在.m文件.h文件中

然后

self.navigationController.delegate = self;

你检测NavigationController与方法改变

- (void)navigationController:(UINavigationController *)navigationController didShowViewController:(UIViewController *)viewController animated:(BOOL)animated 

- (void)navigationController:(UINavigationController *)navigationController willShowViewController:(UIViewController *)viewController animated:(BOOL)animated