TabBar没有显示TabBar项目标题Swift 5

Question

我正在尝试添加标题到我的选项卡栏项，但它没有显示不知道为什么

fileprivate func appenedVC(for rootViewController: UIViewController,tabBarTitle: String, image: UIImage) -> UIViewController {

    let navController = UINavigationController(rootViewController: rootViewController)
    navController.tabBarItem.title = title
    navController.tabBarItem.image = image
    rootViewController.navigationItem.title = title
    navController.navigationBar.prefersLargeTitles = true
    return navController
}

这里是我使用这个方法的viewDidload

abBar.tintColor = UIColor(red: 0, green: 0.5690457821, blue: 0.5746168494, alpha: 1)
    tabBar.unselectedItemTintColor = .black


    viewControllers = [
        appenedVC(for: CategoryVC(), tabBarTitle: "Category", image: #imageLiteral(resourceName: "categoryFilled")),
        appenedVC(for: FeedbackVC(), tabBarTitle: "Feedback", image: #imageLiteral(resourceName: "feedbackIFilled"))
    ]

输出

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Answer 1

将其放入视图控制器- viewDidLoad()

self.title = “title“
self.tabBarItem.image = UIImage(named: “tabImage“)
self.tabBarItem.selectedImage = UIImage(named: “tabSelected”)

你也可以通过故事板做到这一点。在导航控制器中选择Tab栏项，然后转到属性检查器并输入标题。

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Answer 2

在导航控制器中设置嵌入式控制器的tabBarItem。

  fileprivate func appenedVC(for rootViewController: UIViewController, tabBarTitle: String, image: UIImage) -> UIViewController {
    rootViewController.tabBarItem = UITabBarItem(title: title, image: image, selectedImage: image)
    rootViewController.title = tabBarTitle
    let navController = UINavigationController(rootViewController: rootViewController)
    navController.navigationBar.prefersLargeTitles = true
    return navController
  }