Question

这是我的AppDelegate.m

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    UINavigationController *navigationController = (UINavigationController *)self.window.rootViewController;
    EventsMasterViewController *firstViewController = (EventsMasterViewController *)[[navigationController viewControllers] objectAtIndex:0];

    self.window.rootViewController = navigationController;
    [self.window makeKeyAndVisible];

    EventDataController *_myEventsDataController = [[EventDataController alloc] init];
    firstViewController.myEventsDataController = _myEventsDataController;

    EventDataController *_upcomingEventsDataController = [[EventDataController alloc] init];
    firstViewController.upcomingEventsDataController = _upcomingEventsDataController;

    EventDataController *_bookmarkedEventsDataController = [[EventDataController alloc] init];
    firstViewController.bookmarkedEventsDataController = _bookmarkedEventsDataController;

    return YES;
}

当我的唯一视图是嵌入在导航控制器中的MasterViewController和DetailViewController时，这曾经很好用。

现在我想添加一个TabBarController。所以我将NavigationController嵌入到TabBarController中。但我的代表正在抛出一个错误。

我真的需要初始化我的EventDataController的3个实例，如图所示。

所以我想问题是，“我如何以编程方式从tabBarController中获取navigationController，以便我可以将EventsDataControllers添加到firstViewController？”

更新

这是我的错误。我不明白setMyEventsDataController如何成为UINavigationController上的方法。

*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[UINavigationController setMyEventsDataController:]: unrecognized selector sent to instance

Answer 1

UITabBarController必须是窗口的rootViewController。然后，您将每个UINavigationBarController添加为标签栏的contentView。

Answer 2

EventsMasterViewController *firstViewController = (EventsMasterViewController *)[[navigationController viewControllers] objectAtIndex:0];

因为您将firstViewController设置为导航控制器本身。

iOS - 添加TabBarController破坏了我为TableViews定制的AppDelgate.m

2 个答案: