以编程方式设置 UITabBar 标题

Posted 2023-02-23

【中文标题】以编程方式设置 UITabBar 标题

【英文标题】：Programmatically Setting UITabBar Titles

【发布时间】：2011-05-19 09:15:54

【问题描述】：

我以编程方式添加了标签栏，如下所示：-

FirstViewController *obj_FirstViewController = [[FirstViewController alloc] initWithNibName:@"FirstViewController" bundle:nil]; SecondViewController *obj_SecondViewController = [[SecondViewController alloc] initWithNibName:@"SecondViewController" bundle:nil]; ThirdViewController *obj_ThirdViewController = [[ThirdViewController alloc] initWithNibName:@"ThirdViewController" bundle:nil];

navigation1 = [[UINavigationController alloc] initWithRootViewController:obj_FirstViewController];  
navigation2 = [[UINavigationController alloc] initWithRootViewController:obj_SecondViewController];
navigation3 = [[UINavigationController alloc] initWithRootViewController:obj_ThirdViewController];

MainTabBar = [[UITabBarController alloc] init];
MainTabBar.delegate=self;
[MainTabBar setViewControllers:[NSArray arrayWithObjects:navigation1,navigation2,navigation3,nil]];
MainTabBar.view.frame=self.view.frame;
MainTabBar.selectedIndex=0;
[self.view addSubview:MainTabBar.view]

通过在(void)viewDidLoad 中编写此内容，我在视图控制器中获得了 3 选项卡。但问题是我想将选项卡的名称设置为 1)Home 2)Favorites 3)About us

我曾尝试编写以下代码：

- 1)obj_FirstViewController.tabBarItem.title=@"Home"; 2)self.title = @"My View Controller";

但这不起作用。谁能帮助我如何以编程方式执行此操作。在哪里写行，以便我在标签栏中获得这 3 个名称

【问题讨论】：

仅供参考：这不是“xcode”问题：Xcode 是集成开发环境，可用于在多种平台上以多种语言进行编程。这是一个 Cocoa Touch 问题。

【参考方案1】：

试试这个方法……

NSMutableArray *controllers = [[NSMutableArray alloc] init];
FirstViewController *obj_FirstViewController = [[FirstViewController alloc] init];
                [obj_FirstViewController setTitle:@"first"];
                UITabBarItem *item = [[[UITabBarItem alloc] setTabBarItem:          [[[UITabBarItem alloc] initWithTitle: @"First") image:[UIImage imageNamed:@"first.png"] tag:2] autorelease]];
                [obj_FirstViewController setTabBarItem:item];
                [controllers addObject:obj_FirstViewController];
                [obj_FirstViewController release];

【参考方案2】：

请试试这个

FirstViewController *obj_FirstViewController = [[FirstViewController alloc]initWithNibName:@"FirstViewController" bundle:nil]; 
SecondViewController *obj_SecondViewController = [[SecondViewController alloc] initWithNibName:@"SecondViewController" bundle:nil]; 
ThirdViewController *obj_ThirdViewController = [[ThirdViewController alloc] initWithNibName:@"ThirdViewController" bundle:nil];

navigation1 = [[UINavigationController alloc] initWithRootViewController:obj_FirstViewController];  
navigation2 = [[UINavigationController alloc] initWithRootViewController:obj_SecondViewController];
navigation3 = [[UINavigationController alloc] initWithRootViewController:obj_ThirdViewController];

navigation1.title=@"Home";
navigation2.title=@"Second";

 MainTabBar = [[UITabBarController alloc] init];
MainTabBar.delegate=self;
[MainTabBar setViewControllers:[NSArray   arrayWithObjects:navigation1,navigation2,navigation3,nil]];
 MainTabBar.view.frame=self.view.frame;
 MainTabBar.selectedIndex=0;
[self.view addSubview:MainTabBar.view]