tvOS UISearchController - 滚动时如何避免自动搜索栏和键盘隐藏行为？

Question

在我的应用程序中，我按照为 Apple 提供的示例项目 UIKitCatalog 实现了 UISearchController，代码如下：

    /*
         A method demonstrating how to encapsulate a `UISearchController` for presentation in, for example, a `UITabBarController`
    */
    func packagedSearchController() -> UIViewController {
        // Load a `SearchResultsViewController` from its storyboard.
        let storyboard = UIStoryboard(name: "ViewControllerSamples", bundle: nil)
        guard let searchResultsController = storyboard.instantiateViewController(withIdentifier: SearchResultsViewController.storyboardIdentifier) as? SearchResultsViewController else {
            fatalError("Unable to instatiate a SearchResultsViewController from the storyboard.")
        }

        /*
            Create a UISearchController, passing the `searchResultsController` to
            use to display search results.
        */
        let searchController = UISearchController(searchResultsController: searchResultsController)
        searchController.searchResultsUpdater = searchResultsController
        searchController.searchBar.placeholder = NSLocalizedString("Enter keyword (e.g. iceland)", comment: "")

        // Contain the `UISearchController` in a `UISearchContainerViewController`.
        let searchContainer = UISearchContainerViewController(searchController: searchController)
        searchContainer.title = NSLocalizedString("Search", comment: "")

        // Finally contain the `UISearchContainerViewController` in a `UINavigationController`.
        let searchNavigationController = UINavigationController(rootViewController: searchContainer)
        return searchNavigationController
    }

此实现在我的应用程序中运行良好，但具有想要避免的 SearchBar 和键盘的自动隐藏行为，这可能吗？以及如何？

Answer 1

我经常搜索这个问题，我发现的只是覆盖变量disablesAutomaticKeyboardDismissal: Bool并使其返回true，但它没有工作

对我来说唯一成功的解决方案是强制关注搜索栏

class CustomeSearchController : UISearchController {
    
    override var preferredFocusEnvironments: [UIFocusEnvironment]{
        return [self.searchBar]
    }
        
    override func didUpdateFocus(in context: UIFocusUpdateContext, with coordinator: UIFocusAnimationCoordinator) {
        self.view.setNeedsFocusUpdate()
        self.view.updateFocusIfNeeded()
    }
}

希望对你有帮助