iphone – 以编程方式添加TabBarController

发布时间：2020-12-14 19:51:08 所属栏目：百科来源：网络整理

导读：我想以编程方式制作标签栏控制器和导航控制器.我的代码到目前为止工作,它在底部显示一个标签栏,但OptionViewController在第二个标签栏的按钮上没有说任何内容(没有标题).有趣的是,当我点击按钮时没有任何东西,标题出现(他的观点也是如此),有人可以向我解释我

我想以编程方式制作标签栏控制器和导航控制器.我的代码到目前为止工作,它在底部显示一个标签栏,但OptionViewController在第二个标签栏的按钮上没有说任何内容(没有标题).有趣的是,当我点击按钮时没有任何东西,标题出现(他的观点也是如此),有人可以向我解释我做错了什么吗？我试着使用以下代码：

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{    
    // Override point for customization after application launch.
    [self.window makeKeyAndVisible];

    NSMutableArray *tabItems = [[NSMutableArray alloc] initWithCapacity:2];

    DefaultViewController *dvc = [[DefaultViewController alloc] init];
    UINavigationController *dvc_nc = [[UINavigationController alloc] initWithRootViewController:dvc];
    [tabItems addObject:dvc_nc];
    [dvc release];
    [dvc_nc release];

    OptionsViewController *ovc = [[OptionsViewController alloc] initWithStyle:UITableViewStyleGrouped];
    UINavigationController *ovc_nc = [[UINavigationController alloc] initWithRootViewController:ovc];
    [tabItems addObject:ovc_nc];
    [ovc release];
    [ovc_nc release];

    UITabBarController *tbc = [[UITabBarController alloc] init];
    tbc.viewControllers = tabItems;
    self.tabController = tbc;
    [tabItems release];
    [tbc release];

    [self.window addSubview:self.tabController.view];

    return YES;
}

解决方法

您需要设置UINavigationController的tabBarItem和标题,而不是它的根viewController.

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{    
    // Override point for customization after application launch.
    [self.window makeKeyAndVisible];

    NSMutableArray *tabItems = [[NSMutableArray alloc] initWithCapacity:2];

    DefaultViewController *dvc = [[DefaultViewController alloc] init];
    UINavigationController *dvc_nc = [[UINavigationController alloc] initWithRootViewController:dvc];
    dvc_nc.tabBarItem.title = @"Default";
    dvc_nc.tabBarItem.image = [UIImage imageWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"Default" ofType:@"png"]];
    [tabItems addObject:dvc_nc];
    [dvc release];
    [dvc_nc release];

    OptionsViewController *ovc = [[OptionsViewController alloc] initWithStyle:UITableViewStyleGrouped];
    UINavigationController *ovc_nc = [[UINavigationController alloc] initWithRootViewController:ovc];
    ovc_nc.tabBarItem.title = @"Option"
    ovc_nc.tabBarItem.image = [UIImage imageWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"Optiomn" ofType:@"png"]];

    [tabItems addObject:ovc_nc];
    [ovc release];
    [ovc_nc release];

    UITabBarController *tbc = [[UITabBarController alloc] init];
    tbc.viewControllers = tabItems;
    self.tabController = tbc;
    [tabItems release];
    [tbc release];

    [self.window addSubview:self.tabController.view];

    return YES;
}

（编辑：李大同）

【声明】本站内容均来自网络，其相关言论仅代表作者个人观点，不代表本站立场。若无意侵犯到您的权利，请及时与联系站长删除相关内容!