将 UISearchBar 放在 tableview 上方但不在 tableview 或导航栏中

Question

我的故事板中的视图控制器上有一个 UISearchBar 和一个 UITableView。搜索栏位于 tableview 上方，因此它不会滚动。我的问题是 UISearchController 的初始化创建了自己的 SearchBar 实例，该实例与我手动添加并定位在情节提要上的实例不同。

如何将我的故事板 SearchBar 设置为我的 UISearchController 为我创建的？

class ITSearchController: UIViewController, UITableViewDataSource, UITableViewDelegate, UISearchResultsUpdating {

    @IBOutlet weak var tableView: UITableView!
    @IBOutlet weak var searchBar: UISearchBar!

    // So that the search results are displayed in the current controllers table view
    let searchController = UISearchController(searchResultsController: nil)

    override func viewDidLoad() {

        searchController.searchResultsUpdater = self
        searchController.dimsBackgroundDuringPresentation = false
        definesPresentationContext = true

        // This didn't work
        //var view = self.view.viewWithTag(777)
        //view = searchController.searchBar

        // This works but isn't what I want
        //tableView.tableHeaderView = searchController.searchBar

        // This works but places it in the nav section. Not what I want.
        // self.navigationItem.titleView = searchController.searchBar

        // This is what I want but doesn't work. Basically make the search bar on my storyboard equal to the one created.
        searchBar = searchController.searchBar

    }
}

Answer 1

你不能使用 UISearchController 放置在情节提要上的搜索栏，因为 UISearchController 提供了自己的情节提要。

或者，将情节提要中的搜索栏替换为UIView，然后将UISearchController 提供的搜索栏作为子视图添加到UIView。

class ITSearchController: UIViewController, UITableViewDataSource, UITableViewDelegate, UISearchResultsUpdating {

@IBOutlet weak var tableView: UITableView!
@IBOutlet weak var searchView: UIView! // make this UIView

// So that the search results are displayed in the current controllers table view
let searchController = UISearchController(searchResultsController: nil)

override func viewDidLoad() {

    searchController.searchResultsUpdater = self
    searchController.dimsBackgroundDuringPresentation = false
    definesPresentationContext = true

    // This should work
    searchView.addSubview(searchController.searchBar)

}
}

这会给你同样的行为。