如何在swift 3中的tableView上按搜索键时关闭键盘？

Question

How to dismiss keyboard when pressing Search key? I have a search bar on tableView and I used the following method. It did't work. Any Idea why? Thanks in advance.

func textFieldShouldReturn(_ textField: UITextField) -> Bool {

    textField.resignFirstResponder()
    return true

}

UPDATE 2.0 ----------------------------------------------------

This picture is what I am trying to do, when I click search key nothing happened. enter image description here

I have my UISearchBar delegate has set already

class SearchVC: UIViewController, UITableViewDataSource, UISearchBarDelegate  {


@IBOutlet weak var tableView: UITableView!

@IBOutlet weak var searchBar: UISearchBar!

var data = [// my data here.]

var filteredData: [String]!

override func viewDidLoad() {
    super.viewDidLoad()

    tableView.dataSource = self
    searchBar.delegate = self
    filteredData = data


    let tap = UITapGestureRecognizer(target: self, action: #selector(handleTap))
    tableView.addGestureRecognizer(tap)

}

Answer 1

If you are using UISearchBar then first make sure its delegate is set and then add this function

func searchBarSearchButtonClicked(_ searchBar: UISearchBar)  {
    searchBar.resignFirstResponder()
}

Answer 2

The following worked for me.

'searchActive' is used to switch between the filtered values and the original unfiltered values.

'initialUseOfSearchBar' is used to show the keyboard the first time around but after that keyboard is hidden when user presses clear 'x'.

var initialUseOfSearchBar = true

func searchBarTextDidBeginEditing(_ searchBar: UISearchBar) {
    searchActive = true

    if searchBar.text?.characters.count == 0 {
        searchActive = false

        if initialUseOfSearchBar == false {
            searchBar.resignFirstResponder()
        }
    }
}

func searchBarTextDidEndEditing(_ searchBar: UISearchBar) {
    searchActive = false
}

func searchBarCancelButtonClicked(_ searchBar: UISearchBar) {
    searchActive = false
}

func searchBarSearchButtonClicked(_ searchBar: UISearchBar) {
    searchActive = false
}

func searchBar(_ searchBar: UISearchBar, textDidChange searchText: String) {

    if searchText.characters.count == 0 {
        searchActive = false;
        tableView.reloadData()
        searchBar.resignFirstResponder()
    }

    initialUseOfSearchBar = false

   ...

}

...

Answer 3

make sure in viewDidLoad() you do self.textField.delegate = self and of course your viewController must conform to the UITextFieldDelegate protocol. Then, make sure you are spelling the function correctly textFieldShouldReturn()