加载应用程序时如何取消选择选项卡 [英] How to Deselect tab when application is loaded

问题描述

我正在处理标签栏应用程序.启动应用程序时，默认情况下会选择第一个选项卡.

I am working on tabbar application. When application started, by default first tab is selected.

我想要的是启动应用程序时，应该显示选项卡栏而不选择任何选项卡.就像说，如果我有4个选项卡，则当应用程序启动时它们不会被选中.默认情况下，第一个被选中.

What I want to is when I start application, tab bar should be displayed without selected tab. Like say, if i have 4 tabs then non them get selected when application get launched. By default first one get selected.

我想显示一些不属于任何选项卡的视图.

I want to display some views which are not part of any of tabs.

有可能做吗?

谢谢...

推荐答案

是的，这是可能的.

您需要以编程方式创建视图，并在 Window中将该视图添加为SuperView ，当您不需要时，只需将其从SuperView中删除.

You need to create a view programmatically and add that view in Window as SuperView , when you don't need it just remove it form SuperView.

[SuperViewname removeFromSuperView];

代码段:

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

    // Override point for customization after application launch.
    // Add the tab bar controller's view to the window and display.
    [self.window addSubview:tabBarController.view];
        [self.window makeKeyAndVisible];


**AdditionalView**
//======================= LoginView ================================================
    loginview=[[UIView alloc]initWithFrame:CGRectMake(0, 0, 320, 480)];
    imgview_logingpage=[[UIImageView alloc]initWithFrame:CGRectMake(0, 0, 320, 480)];
    imgview_logingpage.image=[UIImage imageNamed:@"Screen.jpg"];

    loginview.backgroundColor=[UIColor blackColor];


        [self.window addSubview:Viewnavigation.view];
    [self.window addSubview:loginview];  // To add the View in Window View

}

//从SuperView中删除视图-(无效)login_clicked:(id)发件人{

// To REmove the View from SuperView -(void)login_clicked:(id)sender {

        Homepage *obj_homepage=[[Homepage alloc]initWithNibName:@"Homepage" bundle:nil];
        [self.window addSubview:obj_homepage.view];
        [loginview removeFromSuperview];
        [loginview release];
}

或者更简单的方法是:通过PresentModalViewController 打开新视图

Or either the more easy way is : Open a new view via PresentModalViewController

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