当我在 iPhone 6.0 模拟器中运行我的应用程序时,它显示
应用程序窗口应该在应用程序启动结束时有一个根视图控制器
在其他模拟器中它不存在。为什么?这个错误是什么意思?
我的应用程序的导航流程是这样的:首先我的应用程序应该显示登录屏幕。进入应用程序后,我需要显示一个带有标签栏的视图。在那个视图中会有很多按钮,当我们单击这些按钮时,它应该显示没有标签栏的相应视图控制器。这就是我将那些导航控制器添加到窗口的原因。
这是我的 didFinishLaunchingWithOptions 代码
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
self.tabBarController = [[UITabBarController alloc] init];
self.window.rootViewController = self.tabBarController;
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
self.window.backgroundColor=[UIColor blackColor];
[application setStatusBarStyle:UIStatusBarStyleBlackOpaque];
Object1 = [[Class1 alloc] initWithNibName:@"Class1" bundle:nil];
tempNav=[[UINavigationController alloc]initWithRootViewController:Object1];
tempNav.navigationBar.hidden=YES;
tempNav.view.frame = CGRectMake(0.0f, 20.0f, 320.0f, 460.0f);
self.window addSubview:tempNav.view];
LoginObj = [[Login alloc] initWithNibName:@"Login" bundle:nil];
navController=[[UINavigationController alloc]initWithRootViewController:LoginObj];
navController.navigationBar.hidden=YES;
navController.view.frame = CGRectMake(0.0f, 20.0f, 320.0f, 460.0f);
[self.window addSubview:navController.view];
Obj2 = [[Class2 alloc] initWithNibName:@"Class2" bundle:nil];
navController1=[[UINavigationController alloc]initWithRootViewController:Obj2];
navController1.navigationBar.hidden=YES;
navController1.view.frame = CGRectMake(0.0f, 20.0f, 320.0f, 460.0f);
[self.window addSubview:navController1.view];
Obj3 = [[Class3 alloc] initWithNibName:@"Class3" bundle:nil];
navController2=[[UINavigationController alloc]initWithRootViewController:Obj3];
navController2.navigationBar.hidden=YES;
navController2.view.frame = CGRectMake(0.0f, 20.0f, 320.0f, 460.0f);
[self.window addSubview:navController2.view];
Obj4 = [[Class4 alloc] initWithNibName:@"Class4" bundle:nil];
navController3=[[UINavigationController alloc]initWithRootViewController:Obj4];
navController3.navigationBar.hidden=YES;
navController3.view.frame = CGRectMake(0.0f, 20.0f, 320.0f, 460.0f);
[self.window addSubview:navController3.view];
[self.window makeKeyAndVisible];
return YES;
}