以编程方式将UISearchController添加到swift 2中的UITableView标头中



在我的视图控制器的早期版本(基于情节提要)中,搜索栏运行良好。在100%编程定义的当前版本中(我删除了所有情节提要引用),搜索栏已经消失。我试图弄清楚问题出在哪里,但没有成功。知道吗?

以下是错误代码片段:

let resultSearchController = UISearchController()
override public func viewDidLoad() {
    super.viewDidLoad()
    // No nav bar
    navigationController?.navigationBar.hidden = true
    // — Add table view
    view.addSubview(tableView)
    tableView.delegate = self
    tableView.dataSource = self
    tableView.translatesAutoresizingMaskIntoConstraints = false
    tableView.leftAnchor.constraintEqualToAnchor(view.leftAnchor, constant: 0).active = true
    tableView.rightAnchor.constraintEqualToAnchor(view.rightAnchor, constant: 0).active = true
    tableView.bottomAnchor.constraintEqualToAnchor(view.bottomAnchor, constant: 0).active = true

    // Add search bar as a the table header
    resultSearchController.dimsBackgroundDuringPresentation = false
    resultSearchController.definesPresentationContext = true
    resultSearchController.hidesNavigationBarDuringPresentation = false
    resultSearchController.searchResultsUpdater = self
    resultSearchController.searchBar.sizeToFit()
    resultSearchController.searchBar.delegate = self
    tableView.tableHeaderView = resultSearchController.searchBar
    /// Add refresh control
    refreshControl.attributedTitle = NSAttributedString(string: "Pull to refresh")
    refreshControl.addTarget(self, action: #selector(BigHeadViewController.refreshTable), forControlEvents: UIControlEvents.ValueChanged)
    tableView.addSubview(refreshControl)  
}

我认为问题可能是第一行。您必须指定"searchResultsController"作为初始化的一部分,即使它为零(要就地搜索)。尝试

let resultSearchController = UISearchController(searchResultsController:nil)

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