默认情况下如何隐藏UISearchController()?

时间:2015-11-07 22:43:32

标签: ios swift uisearchcontroller

我将UISearchController()添加到我的UIViewController中,如下所示:

class SearchViewController: UIViewController, UITableViewDataSource, UITableViewDelegate, UISearchResultsUpdating  { 

let tableData = ["Here's", "to", "the", "crazy"]
var filteredTableData = [String]()
var resultSearchController = UISearchController()

@IBOutlet var tableView: UITableView!


override func viewDidLoad() {
    super.viewDidLoad()

    self.tableView.dataSource = self
    self.tableView.delegate = self
    self.resultSearchController = ({
        let controller = UISearchController(searchResultsController: nil)
        controller.searchResultsUpdater = self
        controller.dimsBackgroundDuringPresentation = false
        controller.searchBar.sizeToFit()

        self.tableView.tableHeaderView = controller.searchBar

        return controller
    })()

    // Reload the table
    self.tableView.reloadData()
}

... TableView函数 ...

func updateSearchResultsForSearchController(searchController: UISearchController)
    {
        filteredTableData.removeAll(keepCapacity: false)

        let searchPredicate = NSPredicate(format: "SELF CONTAINS[c] %@", searchController.searchBar.text)
        let array = (tableData as NSArray).filteredArrayUsingPredicate(searchPredicate)
        filteredTableData = array as! [String]

        self.tableView.reloadData()
    }

我正在尝试隐藏搜索栏,换句话说,使其类似于“Notes”iPhone应用程序的搜索栏样式,您必须向下滚动tableView以显示搜索栏。有没有办法实现这个目标?就像添加一个负面约束,当ViewController加载时,它会隐藏在导航栏下面吗?

1 个答案:

答案 0 :(得分:6)

找到一个非常简单的解决方案,默认隐藏搜索栏,我找到了答案here

我只需要在viewDidLoad()中添加这一行:

tableView.scrollToRowAtIndexPath(NSIndexPath(forRow: 0, inSection: 0), atScrollPosition: UITableViewScrollPosition.Top, animated: false)

更新为Swift 3.0语法:

tableView.scrollToRow(at: IndexPath(row: 0, section: 0), at: .top, animated: false)
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