带有UITableViewController的searchResultsController隐藏了导航栏，如何防止它？

Question

当我将TableViewController指定为UISearchController的构造函数时，当加载表时，它会隐藏导航栏（包括标题和搜索栏）。我该怎么做呢，所以它不会隐藏它？

import UIKit

class ViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
        configureNavigationItem()
    }
}

extension ViewController {

    private func configureNavigationItem() {
        let resultsController =  UITableViewController(style: .plain)
        navigationItem.searchController = UISearchController(searchResultsController: resultsController)
        navigationItem.hidesSearchBarWhenScrolling = false
    }
}

Initial Load

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Answer 1

找到答案：

definesPresentationContext = true

如：

private func configureNavigationItem() {
    let resultsController =  UITableViewController(style: .plain)
    navigationItem.searchController = UISearchController(searchResultsController: resultsController)
    navigationItem.hidesSearchBarWhenScrolling = false
    **definesPresentationContext = true**
}