Question

我试图在我的AppDelegate类中的openURL函数中显示一个ViewController，但我没有运气。我已经尝试了我可以在互联网上找到的每一个解决方案，我不确定我做错了什么...请注意我有一个标签应用程序..

我真的不想使用self.tabBarController.selectedIndex，因为我真的想要显示一个自定义构建的控制器，如下所示：

CategoryTableViewController *controller = nil;
NSUInteger catId = 6;
NSString *title = @"Cat Title!";
NSManagedObjectContext *inMemoryContext = [xyzclient newContextUsingInMemoryStore:YES];
controller = [[CategoryTableViewController alloc] initWithManagedObjectContext:inMemoryContext];
[(CategoryTableViewController *) controller setParentCategory:catId];
[(CategoryTableViewController *) controller setFilterCategory:NO];
[(CategoryTableViewController *) controller setStopRefresh:YES];
controller.title = title;
[self.tabBarController.selectedViewController.navigationController pushViewController:controller animated:YES];

这是我写的代码：

- (BOOL)application:(UIApplication *)application openURL:(NSURL *)url sourceApplication:(NSString *)sourceApplication annotation:(id)annotation {
    NSString *scheme = [url scheme];

    if ([scheme hasPrefix:@"xyz"]) {
        //Attempt 1
        UINavigationController *searchNavigationController = [self navigationControllerForViewControllerClass:[SearchTableViewController class]];
        [self.tabBarController.selectedViewController.navigationController pushViewController:searchNavigationController animated:YES];

        //Attempt 2

        NSManagedObjectContext *inMemoryContext = [DealsClient newContextUsingInMemoryStore:YES];
        SearchTableViewController *controller = [[SearchTableViewController alloc] initWithManagedObjectContext:inMemoryContext];
        [self.tabBarController.selectedViewController.navigationController pushViewController:controller animated:YES];
     }
}

- (UINavigationController *)navigationControllerForViewControllerClass:(Class)viewControllerClass {
    BaseViewController *viewController = [[viewControllerClass alloc] init];
    viewController.context = [self managedObjectContext];
    UINib *nib = [UINib nibWithNibName:@"BaseNavigationController" bundle:nil];
    UINavigationController *navigationController = [[nib instantiateWithOwner:nil options:nil] lastObject];
    navigationController.viewControllers = [NSArray arrayWithObject:viewController];

    return navigationController;
}

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    [super application:application didFinishLaunchingWithOptions:launchOptions];

    self.window.rootViewController = self.tabBarController;

    [DClient setBaseManagedObjectContext:[self managedObjectContext]];

    UINavigationController *featuredNavigationController = [self navigationControllerForViewControllerClass:[FeaturedTableViewController class]];
    featuredNavigationController.tabBarItem = [[UITabBarItem alloc] initWithTitle:NSLocalizedString(@"Home", nil) image:[UIImage imageNamed:@"tabbar_home"] tag:TabBarTabHome];
    UINavigationController *browseNavigationController = [self navigationControllerForViewControllerClass:[CategoryTableViewController class]];
    browseNavigationController.tabBarItem = [[UITabBarItem alloc] initWithTitle:NSLocalizedString(@"Browse", nil) image:[UIImage imageNamed:@"tabbar_browse"] tag:TabBarTabBrowse];
    UINavigationController *searchNavigationController = [self navigationControllerForViewControllerClass:[SearchTableViewController class]];
    searchNavigationController.tabBarItem = [[UITabBarItem alloc] initWithTitle:NSLocalizedString(@"Search", nil) image:[UIImage imageNamed:@"tabbar_search"] tag:TabBarTabSearch];
    UINavigationController *messagesNavigationController = [self navigationControllerForViewControllerClass:[MessagesTableViewController class]];
    messagesNavigationController.tabBarItem = [[UITabBarItem alloc] initWithTitle:NSLocalizedString(@"Messages", nil) image:[UIImage imageNamed:@"tabbar_messages"] tag:TabBarTabMessages];
    UINavigationController *cartNavigationController = [self navigationControllerForViewControllerClass:[CartTableViewController class]];
    cartNavigationController.tabBarItem = [[UITabBarItem alloc] initWithTitle:NSLocalizedString(@"Cart", nil) image:[UIImage imageNamed:@"tabbar_cart"] tag:TabBarTabCart];

    NSArray *viewControllers = [NSArray arrayWithObjects:featuredNavigationController, browseNavigationController, searchNavigationController, messagesNavigationController, cartNavigationController, nil];
    [self.tabBarController setViewControllers:viewControllers animated:NO];

    [xyzEngine setTabBarController:self.tabBarController];

    [self.tabBarController setCartBadgeValue:[xyz numItemsInCart]];
    NSLog(@"Loaded the page....");
    return YES;
}

Answer 1

好的，我仍然不完全确定你想要达到的目标，所以我会假设以下内容：

您有一个带有5个项目的标签栏控制器。每个项目都是具有特定类的导航控制器。根据传递给application:openURL:sourceApplication:annotation:的url参数，您要选择标签栏控制器中的正确项目（之前已在application: didFinishLaunchingWithOptions中加载）。

这是我的尝试：

- (BOOL)application:(UIApplication *)application 
            openURL:(NSURL *)url 
  sourceApplication:(NSString *)sourceApplication 
         annotation:(id)annotation {

    if ([scheme hasPrefix:@"xyz"]) {
        Class navigationControllerClass = [SearchTableViewController class];

        NSUInteger navigationControllerIndex = [self.tabBarController.viewControllers indexOfObjectPassingTest:^BOOL(id obj, NSUInteger idx, BOOL *stop) {
          BOOL found = [obj isKindOfClass:navigationControllerClass];
          if (found) {
            *stop = YES;
          }
          return found;
        }];

        if (NSNotFound != navigationControllerIndex) {
            self.tabBarController.selectedIndex = navigationControllerIndex;
        }
    }
}

拿2

在您的2次尝试中，您正在创建一个新的导航控制器，然后尝试将其推送到nil（self.tabBarController.selectedViewController.navigationController为nil的内容，因为{ {1}}是导航控制器。）

无论你在导航控制器中推动什么，都不能成为另一个导航控制器。因此，您需要创建一个类型为self.tabBarController.selectedViewController的简单视图控制器，并将其推送到选项卡栏的当前所选导航控制器。

UIViewController

从标签栏中的app delegate推送View Controller

1 个答案:

拿2