在模拟器中启动 iOS 应用程序时的白色视图
我已经在一个应用程序上工作了 4 个月，它相当复杂，但运行良好。 现在突然，我添加了一个新类，并对 MainWindow.xib 进行了一些更改，其中包含我的所有视图，现在当我使用模拟器启动它时，我只得到一个纯白色的视图。 我什至将其完全剥离，只剩下应用程序委托和一个带有按钮的简单普通视图。所以基本上我有一个应用程序，除了管理 tabBar 的 appDelegate 之外什么都没有，用一个简单的视图启动，没有框架什么也没有，我仍然得到一个白色的应用程序。
必须有一个选项我必须激活才能在模拟器中运行应用程序，但我无法弄清楚。
谢谢
I have been working for 4 months on an app, its pretty complex and works fine.
Now suddenly, I added a new class and did some changes to the MainWindow.xib with all my views there and now I just get a plain white view when I launch it with simulator.
I even stripped it down completely to nothing but the appdelegate and one simple plain view with a button. So basically I've got an app with nothing but an appDelegate managing a tabBar, launching with one simple view, no frameworks no nothing and I still get a white app.
There must be an option somewhere that I must have activated for the running of app in simulator but I can't figure it out.
Thank you
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我意识到很久以前我从来没有解释过我是如何让它工作的：
正如 EmptyStack 指示的那样，窗口链接错误，但它不在代码中，而是在界面构建器的视图属性中。我已将窗口的类型设置为应该是窗口控制器的类，而不是类型（：
I realized I never explained how I got it working after all, long time ago:
Bad linking of the window, as EmptyStack directed me to, but it wasn't in the code, it was in the view properties in the Interface builder. I had set the Type of the window to be the class that should have been the controller of the window, not the type (:
如果您忘记通过
[self.window addSubview:yourRootViewController.view]或通过self.window.rootViewController = yourRootViewController; 将根视图控制器添加到主窗口，就会发生这种情况。（注意：如果您通过代码执行此操作）。而且，您看到白色是因为主窗口的
backgroundColor是white。This happens if you have forget to add the root view controller to the main window, either by
[self.window addSubview:yourRootViewController.view], or byself.window.rootViewController = yourRootViewController;(Note: If you are doing it by code).And, you are seeing the white color because main window's
backgroundColoriswhite.