UITabBar 在 iOS 中不显示图标

Question

我正在以编程方式登录后创建一个标签栏控制器。 所以我使用以下代码。 我的问题是图标没有显示在标签栏中。

func makeTabBarController() -> Void {
        
        
        let storyboard = UIStoryboard(name: "Main", bundle: nil)
        let vc1 = storyboard.instantiateViewController(withIdentifier: "homevcID")
        
        
        let nav1 = UINavigationController()
        nav1.viewControllers = [vc1]
        nav1.tabBarItem = UITabBarItem(title: "Steps", image: UIImage(named: "music.png"), tag: 1)
        
        let vc2 = storyboard.instantiateViewController(withIdentifier: "historyvcID")
        
        let nav2 = UINavigationController()
        nav2.viewControllers = [vc2]
        nav2.tabBarItem = UITabBarItem(title: "History", image: UIImage(named: "music"), tag: 2)
        
        
        let tabBarVc = UITabBarController()
        //tabBarVc.tabBar.barTintColor = .green
        //tabBarVc.tabBar.tintColor = .white
        //tabBarVc.tabBar.unselectedItemTintColor = .systemGray
       // tabBarVc.tabBar.isTranslucent = true
        //
        
        tabBarVc.viewControllers = [vc1, vc2]
        
        window?.rootViewController = tabBarVc
        
    }

Answer 1

为导航控制器设置一个 rootViewController，如下所示：

let nav = UINavigationController(rootViewController: vc)

你可以试试这个：

let nav1 = UINavigationController(rootViewController: vc1)
nav1.tabBarItem = UITabBarItem(title: "Steps", image: UIImage(named: "music.png"), tag: 1)