以编程方式创建和删除UIViews [英] Creating and Removing UIViews Programmatically

问题描述

我正在学习如何以编程方式操作视图显示，我设法使用以下代码块在appDelegate中显示一个新视图：

I am learning how to manipulate view displays programmatically, I manage to display a new view in my appDelegate with the following block of code:

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {    

UINavigationController *navController = [[UINavigationController alloc] init];
loginController = [[LoginController alloc] init];
[navController pushViewController:loginController animated:NO];
[self.window addSubview:navController.view];
[self.window makeKeyAndVisible];

return YES; }

我在此视图中添加了一个按钮，该按钮将删除当前视图并假设以编程方式显示一个新视图但是，我只是设法删除视图而不显示新视图。

I have added a button in this view that will remove this current view and supposedly programmatically display a new view, however, I only managed to remove the view and not display the new view.

显示第二个视图的代码如下：

my code to display the second view is the following:

HomeController *homeView = [[HomeController alloc] init];
        [self.window addSubview:homeView.view];
        [homeView.view release];

请指教..我一直在寻找数小时无济于事，使用Switch Views编程，iPhone视图，removeOperview ..

Please advise.. I've been searching for hours to no avail, using Switch Views Programmatically, iPhone Views, removeSuperview..

基本上我想创建一个简单的登录流程，在app start我将显示我的第一个视图（登录表单），成功登录后我想要丢弃旧视图并显示第二个视图，这是我的主页。

Basically I want to create a simple login flow, at app start I will display my first view (login form), after successful login I want to discard the old view and display the second view which is my home page.

推荐答案

你在使用的UINavigationController 。事实上，你几乎就在那里。

You are on the right track with using the UINavigationController. In fact, you are almost there.

你已经有两个视图控制器 - 一个用于登录页面，一个用于主页。在 didFinishLaunchingWithOptions：中，将两个控制器推送到 UINavigationController 的堆栈：首先是home控制器，然后是登录一个。登录控制器检测到登录成功后，调用 popViewControllerAnimated：或 popToRootViewControllerAnimated：进入主页。

You already have two view controllers - one for the login page, and one for the home page. In the didFinishLaunchingWithOptions:, push both controllers onto the UINavigationController's stack: first the "home" controller, then the "login" one. Once the login controller detects that the login has been successful, call popViewControllerAnimated: or popToRootViewControllerAnimated: to get to the home page.

这篇关于以编程方式创建和删除UIViews的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！