Question

在我的项目中，我使用tabBarController作为rootView控制器，然后在我的一个选项卡上添加我现有的ToDoList应用程序。我遇到的问题是：如果我在AppDelegate中使用此代码：ToDoList作为RootView加载。但我希望它只在选择了适当的标签后显示。

- (void)applicationDidFinishLaunching:(UIApplication *)application {  
    //todoRootController.managedObjectContext = self.managedObjectContext;
    ToDoRootViewController *todoRootViewController = [[ToDoRootViewController alloc]initWithNibName:@"ToDoRootViewController" bundle:nil];
    NSManagedObjectContext *context = [self managedObjectContext];

    if (!context) {
        // Handle the error.
    }

    // Pass the managed object context to the view controller.
    todoRootViewController.managedObjectContext = context;
    UINavigationController *aNavigationController = [[UINavigationController alloc]                                                  
                                                     initWithRootViewController:todoRootViewController];
    self.navigationController = aNavigationController;

    [window addSubview:[navigationController view]];
    [window makeKeyAndVisible];
    [todoRootViewController release];

    [aNavigationController release];
}

我将applicationDidFinishLaunching：（UIApplication *）应用程序方法替换为CoreDataReceipeis示例代码

- (void)applicationDidFinishLaunching:(UIApplication *)application {  
    todoRootController.managedObjectContext = self.managedObjectContext;

//////////////// same stuff
}

然后它给出'NSInternalInconsistencyException'，原因是：'+ entityForName：无法找到实体名称的NSManagedObjectModel'任务''

Answer 1

利用Interface Builder设置键入选项卡时将显示的选项卡视图控制器。

如果您必须以编程方式执行此操作，那么您应该查看TabBarControllers的文档。

的

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

  tabBarController = [[UITabBarController alloc] init]; 

  MyViewController* vc1 = [[MyViewController alloc] init]; 

  MyOtherViewController* vc2 = [[MyOtherViewController alloc] init]; 

  NSArray* controllers = [NSArray arrayWithObjects:vc1, vc2, nil]; 

  tabBarController.viewControllers = controllers; 

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

}

TabBar应用程序，CoreData相关应用程序崩溃

1 个答案: