添加 tabBarController、iOS、Swift 后导航消失答案

【问题标题】：Navigation disappeared after adding tabBarController, iOS, Swift添加 tabBarController、iOS、Swift 后导航消失
【发布时间】：2021-05-20 10:06:01
【问题描述】：

我正在尝试实现 tabBarController 并且我设法做到了，但现在我从 tabBar 内的屏幕导航消失了。我尝试在 viewDidLoad 设置中的每个 viewController 中将 isHidden 设置为 false，但没有帮助。下面的代码来自我的 tabBarController。

class BottomTabBarViewController: UITabBarController, UINavigationControllerDelegate {
    
override func viewDidLoad() {
    super.viewDidLoad()
    self.navigationController?.isNavigationBarHidden = false
    self.viewControllers = [bookedTrips, bookedTripsDetails, needHelp]
    customizeTabBar()
}

func customizeTabBar() {
    tabBar.backgroundColor = .init(red: 0.949, green: 0.949, blue: 0.949, alpha: 1)
    tabBar.shadowImage = UIImage()
    tabBar.backgroundImage = UIImage()
    tabBar.tintColor = .init(red: 0.949, green: 0.392, blue: 0.153, alpha: 1)
    tabBar.unselectedItemTintColor = .init(red: 0.753, green: 0.753, blue: 0.753, alpha: 1)
}

lazy public var bookedTrips: BookedTripsListViewController = {
    let initialTabBar = BookedTripsListViewController(networkManager: NetworkManager())
    let tabBarItems = UITabBarItem(title: "First", image: UIImage(named: "bag.png"), selectedImage: UIImage(named: "bag.png"))
    let tabBarItem = UITabBarItem(title: tabBarItems.title, image: tabBarItems.image, selectedImage: tabBarItems.selectedImage)
    initialTabBar.tabBarItem = tabBarItem
    return initialTabBar
}()

lazy public var bookedTripsDetails: TripDetailsViewController = {
    let initialTabBar = TripDetailsViewController()
    let tabBarItems = UITabBarItem(title: "Second", image: UIImage(named: "bag.png"), selectedImage: UIImage(named: "bag.png"))
    let tabBarItem = UITabBarItem(title: tabBarItems.title, image: tabBarItems.image, selectedImage: tabBarItems.selectedImage)
    initialTabBar.tabBarItem = tabBarItem
    return initialTabBar
}()

lazy public var needHelp: NeedHelpViewController = {
    let initialTabBar = NeedHelpViewController()
    let tabBarItems = UITabBarItem(title: "Third", image: UIImage(named: "bag.png"), selectedImage: UIImage(named: "bag.png"))
    let tabBarItem = UITabBarItem(title: tabBarItems.title, image: tabBarItems.image, selectedImage: tabBarItems.selectedImage)
    initialTabBar.tabBarItem = tabBarItem
    return initialTabBar
}()
}

不确定是否相关，但我将tabBar设置为登录后可见，因此如果登录数据正确，则显示tabBar。

【问题讨论】：

tabor 中的控制器应该是 navigationController，然后每个选项卡都有自己的导航堆栈。标签栏不会对导航做任何事情。
我应该将我想在 tabBar 中显示的每个控制器都设置为 rootController 吗？ @PtitXav

标签： ios swift xcode uinavigationcontroller uitabbarcontroller

【解决方案1】：

设法解决了这个问题，如果有人需要类似的帮助，解决方案是设置返回类型 UINaviagtionController 并将 viewController 的实例设置为 rootController，示例如下。

   lazy public var bookedTrips: UINavigationController = {
    let initialTabBar = UINavigationController(rootViewController: BookedTripsListViewController(networkManager: NetworkManager()))
    let tabBarItems = UITabBarItem(title: "First", image: UIImage(named: "bag.png"), selectedImage: UIImage(named: "bag.png"))
    let tabBarItem = UITabBarItem(title: tabBarItems.title, image: tabBarItems.image, selectedImage: tabBarItems.selectedImage)
    initialTabBar.tabBarItem = tabBarItem
    return initialTabBar
}()

【讨论】：