iPhone登录界面问题 [英] iPhone login screen problem

问题描述

我有一个大型应用程序。它们之间有很多表格和导航。我作为'NavigationBasedProject'（xcode模板）开始了一个项目。但现在我需要在应用程序的开头添加登录。所以我到目前为止所做的是：
在'didFinishLaunchingWithOptions'中我添加了：

I have a large application. It has a lot of tables and navigation between them. I started a project as a 'NavigationBasedProject' (xcode template). But now I need to add login at the start of the application. So here what I did so far: In 'didFinishLaunchingWithOptions' I added:

loginViewController = [[LoginViewController alloc]init];
        [loginViewController.view setFrame:CGRectMake(0, 0, 320, 480)];
        [self.window.rootViewController presentModalViewController:loginViewController animated:NO];

当用户数据有效时，我会忽略登录屏幕：

When user data are valid I dismiss login screen like this:

[self.loginViewController dismissModalViewControllerAnimated:YES];

用户还可以从应用程序注销。然后我再次出现登录屏幕：

User can also logout from application. And then I present login screen again like this:

[self.window.rootViewController presentModalViewController:loginViewController animated:NO];

这是有效的。但是登录屏幕上的文本字段仍然填充了用户输入登录的数据。我担心这里有一些记忆问题。用户登录时如何从内存中完全删除登录屏幕。我不使用GUI设计器我从代码连接所有内容。
另外我想知道制作登录屏幕和模态视图是个好主意吗？

And this works. But text fields on login screen are still filled with data that user enter to login. And I am afraid that I have some memory issue here. How to remove login screen completely from memory when user logs in. I don't use GUI designer I connect everything from code. Also I wonder is it good idea to make login screen and modal view?

推荐答案

你应该使用... 。（我不知道为什么你在课堂级别声明 loginViewController ）

you should use.... (I don't know why you are declaring it loginViewController at class level)

LoginViewController *loginViewController = [[LoginViewController alloc]init];
            [loginViewController.view setFrame:CGRectMake(0, 0, 320, 480)];
            [self.window.rootViewController presentModalViewController:loginViewController animated:NO];
    [loginViewController release];

以及解雇.....

[self.window.rootViewController dismissModalViewControllerAnimated:YES];

谢谢，

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