Question

我正在开发一个TVOS应用程序。我使用下面的代码在UITabBarController中实现搜索功能。显示标签栏时的问题，然后标签栏覆盖搜索栏。见下面的截图。如果显示标签栏，是否可以向下移动searchBar位置？

let searchViewController = VVSearchViewController()
    let searchController = UISearchController(searchResultsController: searchViewController)
    searchViewController.searchViewController = searchController

    searchController.searchResultsUpdater = searchViewController

    searchController.obscuresBackgroundDuringPresentation = true

    let searchPlaceholderText = "Search"
    searchController.searchBar.placeholder = searchPlaceholderText
    searchController.searchBar.tintColor = UIColor.black
    searchController.searchBar.barTintColor = UIColor.black
    searchController.searchBar.searchBarStyle = .minimal
    searchController.searchBar.keyboardAppearance = .dark

    searchController.view.backgroundColor = UIColor.black
    searchController.definesPresentationContext = true;
    UISearchContainerViewController(searchController: searchController)

Answer 1

您可以在选项卡的搜索中找到完全相同的案例＆＃34; App Store＆＃34;。

这是因为在tvOS中，viewController的内容不应该对标签栏的可见性做出反应。标签栏显示在其上方，重叠。

用于标签栏的tvOS人机界面指南： https://developer.apple.com/tvos/human-interface-guidelines/interface-elements/tab-bars/

Answer 2

有可能。我花了一段时间，但我的想法是将搜索控制器添加到顶部约束的“容器”控制器中。如果尝试将UISearchController作为子视图控制器添加到容器中，则不会显示任何内容。 UISearchContainerViewController不能正常工作。但是以UISearchContainerViewController为根的导航控制器有效。这是我的代码：

// Create the search controller and it's results controller
        let resultsController = UIStoryboard(name: "Main", bundle: nil).instantiateViewController(withIdentifier: "SearchResultsViewController") as! SearchResultsViewController
        let searchController = UISearchController(searchResultsController: resultsController)
        searchController.searchResultsUpdater = resultsController
        
// Customize it
        UITextField.appearance(whenContainedInInstancesOf: [UISearchBar.self]).defaultTextAttributes = [.foregroundColor: UIColor.text]

        searchController.searchBar.placeholder = NSLocalizedString("Search", comment: "")
        searchController.searchBar.tintColor = .text
        searchController.searchBar.barTintColor = .text
        searchController.searchBar.searchBarStyle = .minimal
        searchController.searchBar.keyboardAppearance = .dark

// Embed it in UISearchContainerViewController
        let searchContainerViewController = UISearchContainerViewController(searchController: searchController)
// Make UISearchContainerViewController root controller of a navigation controller
        let navController = UINavigationController(rootViewController: searchContainerViewController)
// And a container to hold everything
        let containerViewController = UIViewController()
            
// Do a standard child add of navController into containerViewController
        navController.loadViewIfNeeded()
        navController.viewWillAppear(false)
        navController.willMove(toParent: containerViewController)
        
        containerViewController.view.addSubview(navController.view)
        navController.view.frame = containerViewController.view.bounds

// Add your constraints. In this case I just want the search bar to be 150 px down.
        NSLayoutConstraint.activate([
            navController.view.topAnchor.constraint(equalTo: containerViewController.view.safeAreaLayoutGuide.topAnchor, constant: 150),
            navController.view.leftAnchor.constraint(equalTo: containerViewController.view.safeAreaLayoutGuide.leftAnchor),
            navController.view.bottomAnchor.constraint(equalTo: containerViewController.view.safeAreaLayoutGuide.bottomAnchor),
            navController.view.rightAnchor.constraint(equalTo: containerViewController.view.safeAreaLayoutGuide.rightAnchor)
        ])        containerViewController.addChild(navController)

        containerViewController.addChild(navController)
        navController.didMove(toParent: containerViewController)
        navController.viewDidAppear(false)

// And from here use the containerViewController as normal to display a search into your app.

注意：如果没有在navController上传递viewDidAppear，它将无法正常工作。注意2：我仅在tvOS 13和14上测试过。

TVOS：在UISearchViewController中调整搜索栏的位置

2 个答案: