UISearchController不可见UISearchController的searchResultsController

如何解决UISearchController不可见UISearchController的searchResultsController

我想要的是searchResultsController是可见的，即使搜索查询为空。我通过将searchResultsController的视图设置为在updateSearchResults(for searchController: UISearchController)方法中不隐藏来实现。它工作正常，但XCTest框架无法找到searchResultsController的内容。

这是带有searchBar的主UIViewController的代码（通过Storyboard嵌入在UINavigationController中）：

class ViewController: UIViewController,UISearchResultsUpdating {
    
    private let searchController = UISearchController(searchResultsController: SearchResultsViewController())

    override func viewDidLoad() {
        super.viewDidLoad()
        
        searchController.searchResultsUpdater = self
        navigationItem.searchController = searchController
    }
    
    // MARK: - UISearchResultsUpdating
    
    func updateSearchResults(for searchController: UISearchController) {
        // Make results visible even if search query is empty
        searchController.searchResultsController?.view.isHidden = false
    }
}

这是SearchResultsViewController的代码，仅显示标签：

final class SearchResultsViewController: UIViewController {
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        let label = UILabel()
        label.text = "search"
        view.addSubview(label)
        label.translatesAutoresizingMaskIntoConstraints = false
        NSLayoutConstraint.activate([
            label.centerXAnchor.constraint(equalTo: view.centerXAnchor),label.centerYAnchor.constraint(equalTo: view.centerYAnchor)
        ])
    }
}

最后，UI测试自身（成功完成）：

class SearchUiTestingUITests: XCTestCase {

    func testExample() throws {
        // UI tests must launch the application that they test.
        let app = XCUIApplication()
        app.launch()

        let searchField = app.searchFields.firstMatch
        searchField.tap()
        // failing to find the label,but it's there
        XCTAssertFalse(app.staticTexts["search"].exists)
        searchField.typeText("1")
        // Now it finds it
        XCTAssert(app.staticTexts["search"].exists)
    }
}

What it looks like running this test

这是一个错误吗？我应该提雷达吗？