Xcode 11.3、UINavigationController 和UITabBarController 遇到问题。

huangapple
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英文:

Xcode 11.3, UInavigationController and UITabbarController facing issues

问题

Brief: 我在UINavigationController中嵌入了4个控制器，然后通过代码将它们用作UITabbarController中的选项卡（没有故事板和.xib文件）。

之前我使用的是Xcode 10.3，没有问题，但在切换到11.3后出现了以下问题。

Issues（问题）：

  1. 当我点击选项卡时，控制器的viewWillAppear和viewDidAppear方法没有被调用。

  2. 导航控制器也有类似的问题，详情请查看 https://stackoverflow.com/q/58254034/5247034。

  3. 从任何控制器导航到它后，返回（按返回按钮）没有动画效果。

Code TabbarController（代码 TabbarController）：

  1. final class TabBarController: UITabBarController {
  2.     
  3.     override func viewDidLoad() {
  4.         super.viewDidLoad()
  5.         
  6.         self.viewControllers = [
  7.             TabBarItems.home.tabController,
  8.             TabBarItems.search.tabController,
  9.             TabBarItems.cart.tabController,
  10.             TabBarItems.account.tabController
  11.         ]
  12.         
  13.         self.tabBar.isTranslucent = false
  14.     }
  15. }
  17. extension TabBarController {
  18.     enum TabBarItems {
  19.         case home
  20.         case search
  21.         case cart
  22.         case account
  23.         
  24.         var title: String {
  25.             switch self {
  26.             
  27.             case .home:
  28.                 return "主页"
  29.             case .search:
  30.                 return "搜索"
  31.             case .cart:
  32.                 return "购物袋"
  33.             case .account:
  34.                 return "账户"
  35.             }
  36.         }
  37.         
  38.         var tabController: UINavigationController {
  39.             switch self {
  40.             
  41.             case .home:
  42.                 return createNavController(viewController: HomeController(), title: self.title, imageName: Assets.home.rawValue)
  43.             case .search:
  44.                 return createNavController(viewController: UIViewController(), title: self.title, imageName: Assets.search.rawValue)
  45.             case .cart:
  46.                 return createNavController(viewController: BagController(), title: self.title, imageName: Assets.shoppingBag.rawValue)
  47.             case .account:
  48.                 return createNavController(viewController: AccountController(), title: self.title, imageName: Assets.account.rawValue)
  49.             }
  50.         }
  51.         
  52.         private func createNavController(viewController: UIViewController, title: String, imageName: String) -> UINavigationController {
  53.             let navController = UINavigationController(rootViewController: viewController)
  54.             viewController.view.backgroundColor = .white
  55.             navController.tabBarItem.title = title
  56.             navController.tabBarItem.image = imageName.image
  57.             return navController
  58.         }
  59.     }
  60. }
英文:

Brief: I have 4 controllers embedded in UINavigationController, who are then used as tabs in UITabbarController, (No storyboards and .xib's) through code.

Previously I was using Xcode 10.3, there were no issues but after I changed to 11.3 these issues came up.

Issues:

  1. when I tap on the tabs, viewWillAppear, and viewDidAppear on the controllers are not getting called.

  2. similar issue with navigation controller https://stackoverflow.com/q/58254034/5247034

  3. Pop back (pressing back button) from any controller after navigating to it is not getting animated.

Code TabbarController:

  1. final class TabBarController: UITabBarController {
  2.     
  3.     override func viewDidLoad() {
  4.         super.viewDidLoad()
  5.         
  6.         self.viewControllers = [
  7.             TabBarItems.home.tabController,
  8.             TabBarItems.search.tabController,
  9.             TabBarItems.cart.tabController,
  10.             TabBarItems.account.tabController
  11.         ]
  12.         
  13.         self.tabBar.isTranslucent = false
  14.     }
  15. }
  17. extension TabBarController {
  18.     enum TabBarItems {
  19.         case home
  20.         case search
  21.         case cart
  22.         case account
  23.         
  24.         var title: String {
  25.             switch self {
  26.             
  27.             case .home:
  28.                 return "Home"
  29.             case .search:
  30.                 return "Search"
  31.             case .cart:
  32.                 return "Bag"
  33.             case .account:
  34.                 return "Account"
  35.             }
  36.         }
  37.         
  38.         var tabController: UINavigationController {
  39.             switch self {
  40.             
  41.             case .home:
  42.                 return createNavController(viewController: HomeController(), title: self.title, imageName: Assets.home.rawValue)
  43.             case .search:
  44.                 return createNavController(viewController: UIViewController(), title: self.title, imageName: Assets.search.rawValue)
  45.             case .cart:
  46.                 return createNavController(viewController: BagController(), title: self.title, imageName: Assets.shoppingBag.rawValue)
  47.             case .account:
  48.                 return createNavController(viewController: AccountController(), title: self.title, imageName: Assets.account.rawValue)
  49.             }
  50.         }
  51.         
  52.         private func createNavController(viewController: UIViewController, title: String, imageName: String) -> UINavigationController {
  53.             let navController = UINavigationController(rootViewController: viewController)
  54.             viewController.view.backgroundColor = .white
  55.             navController.tabBarItem.title = title
  56.             navController.tabBarItem.image = imageName.image
  57.             return navController
  58.         }
  59.     }
  60. }

答案1

得分: 0

问题出在一个在XCode 10.3中创建的项目上，尝试在XCode 11+中直接运行它。

在iOS 13/XCode 11之前，应用程序的起点是AppDelegate，但现在在Xcode 11+中，SceneDelegate也承担了一部分责任。即window的配置应该在scene(:willConnectTo:)函数中完成。

我忘了添加SceneDelegate.swift文件和相应的Info.plist键。

感谢@DonMag的帮助。

英文:

The issue was with a project created in XCode 10.3 and trying to run it out of the box in XCode 11+.

As prior to iOS 13/ XCode11, the apps starting point was AppDelegate but now in Xcode 11+, SceneDelegate shared some of the responsibility. i.e. the window configuration should be done in scene(:willConnectTo:) function.

I forgot to add SceneDelegate.swift and Info.plist key for that.

Thanks @DonMag for helping me out.

huangapple
  • 本文由 发表于 2020年1月3日 19:56:04
  • 转载请务必保留本文链接：https://go.coder-hub.com/59578198.html
  • ios
  • swift
  • uikit
  • xcode11
  • xcode11.3
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