登录到主应用 [英] Login to main app

问题描述

我已经构建了主应用程序和登录名.

I've already built the main app and the login.

在 appDelegate.m didFinishLaunchingWithOptions 中，我有

[self.window addSubview:rootController.view];

哪个会加载mainView.

Which loads up the mainView.

但是，我希望它像成功登录一样首先加载我的登录名，它将加载rootController(主应用程序)等.

However, I would want it to load up my login first as on a successful login, it will load the rootController (main app) etc.

当我放上

[self.validateViewController presentModalViewController:validateViewController animated:YES]; 

并运行该应用程序，我得到的只是一个白屏.

and run the app, all I get is a white screen.

我在做什么错了?

->我尝试执行此操作的原因是因为此刻，我首先加载了rootController，但是在viewDidLoad中，它加载了Login模态.因此，它首先运行numberOfRowsInSection，因此当我最终在登录后进入应用程序时，由于它已经通过numberOfRowsInSection，因此它不会显示任何表视图.

-> The reason I'm trying to do this is because at the moment, I have the rootController load up first but in the viewDidLoad, it loads the Login modal. Because of that, it runs numberOfRowsInSection first and so when I do eventually go into the app after login, it won't show any tableview since it's already gone through numberOfRowsInSection.

推荐答案

您需要在已经显示视图的控制器上运行presentModalViewController.现在，您正在实际要显示的视图上运行presentModalViewController.

You need to run presentModalViewController on a controller that has a view being displayed already. Right now you are running presentModalViewController on the view you actually want to present.

您可以在将rootController添加到应用程序窗口后显示validateViewController:

You could present the validateViewController after adding the rootController to the app window:

[rootViewController presentModalViewController:validateViewController animated:YES];

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