Question

这是我的app-delegate.m的代码存根 - 它永远不会被调用。

- (void)tabBarController:(UITabBarController *)tabBarController didSelectViewController:(UIViewController *)viewController {
    NSLog(@"%s", __FUNCTION__);
}

它在此app-delegate.h中定义

@interface OrioleAppDelegate : NSObject <UIApplicationDelegate, UITabBarControllerDelegate> {
    UIWindow *window;
    UITabBarController *tabBarController;
}

@property (nonatomic, retain) IBOutlet UIWindow *window;
@property (nonatomic, retain) IBOutlet UITabBarController *tabBarController;

@end

Answer 1

您是否在UITabBarController和申请代表之间建立了联系？

- (void)applicationDidFinishLaunching:(UIApplication *)application
{
     ...
     tabBarController.delegate = self;
     ...
}

Answer 2

如果您的ViewController是UITabBarController，则需要将self设置为委托，因为您无法直接更改UITabBar的委托。

例如，在UITabBarController的ViewDidLoad中：

- (void)viewDidLoad
{
    [super viewDidLoad];
    self.delegate = self;
}

Answer 3

我添加了以下tabBarController.delegate = self;，一切都很顺利。我希望这对其他人有帮助。

- (void)applicationDidFinishLaunching:(UIApplication *)application {

    // Add the tab bar controller's current view as a subview of the window
    tabBarController.delegate = self;
    [window addSubview:tabBarController.view];
}

我的UITabBarController的didSelectViewController方法没有被调用？

3 个答案: