从应用程序委托在应用程序窗口上添加标签 [英] Adding Label on Application Window from app delegate

问题描述

我使用的是 Xcode 4.5 和 iOS 6.0，我从 xcode 中选择了默认的单视图模板，我只想在应用程序窗口上添加标签，但我无法这样做.请纠正我.

I am using Xcode 4.5 and iOS 6.0, I have selected the default single view template from the xcode, I just want to add the label on the application window but I am unable to do so. Please correct me.

- (BOOL)application:(UIApplication *)application 
didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
// Override point for customization after application launch.
self.viewController = [[ViewController alloc] initWithNibName:@"ViewController"        bundle:nil];
self.window.rootViewController = self.viewController;
label =[[UILabel alloc] initWithFrame:CGRectMake(100, 100, 200, 20)];
label.text = @"Test";
[label setBackgroundColor:[UIColor whiteColor]];
[self.window addSubview:label];
[self.window bringSubviewToFront:label];
[self.window makeKeyAndVisible];
return YES;
}

PS - 我希望我的标签在我的 ViewController 视图之上，即在窗口上，所以尽管窗口呈现的视图发生了变化，它仍将始终存在.我不想在这里只显示标签.

PS - I want my label on top of my ViewController view i.e. on the window so it will be always there despite changes in the views presented by window. I dont want to only show the label here.

我得到了答案

[self.window.rootViewController.view addSubview:label];

谢谢大家指点.

推荐答案

只需删除 RootviewController.

- (BOOL)application:(UIApplication *)application 
didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
// Override point for customization after application launch.

label =[[UILabel alloc] initWithFrame:CGRectMake(100, 100, 200, 20)];
label.text = @"Test";
[label setBackgroundColor:[UIColor whiteColor]];
[self.window addSubview:label];
[self.window bringSubviewToFront:label];
[self.window makeKeyAndVisible];
return YES;
}

如果您不想只在此处显示标签，请使用如下所示.

if you dont want to only show the label here then use like below.

self.viewController = [[ViewController alloc] initWithNibName:@"ViewController"        bundle:nil];
self.window.rootViewController = self.viewController;


[self.Viewcontroller.view addSubview:label];

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