ios - UISearchcontroller 搜索栏委托(delegate)不工作

Question

class PlaceSelectorViewController: UIViewController, GMSAutocompleteResultsViewControllerDelegate, UISearchBarDelegate {

我已经包含了搜索栏委托(delegate)

searchController?.searchBar.delegate = self

并且我已经设置了委托(delegate)。

但是方法

func searchBarCancelButtonClicked(_ searchBar: UISearchBar) {
    stopHighlight()
}

不会发生。

Delegate 已正确设置并且 stopHighlight() 是一个真正的函数

Answer 1

在 viewdidload 方法中生成 searchbar 的委托(delegate)。

 override func viewDidLoad() {
            super.viewDidLoad()
            searchBarCustom.delegate = self
       }

或者你可以在 Storyboard中将它设置为

-因此委托(delegate)将调用

 func searchBarCancelButtonClicked(_ searchBar: UISearchBar) {
        print("searchBarCancelButtonClicked")
    }

编辑:对于 UISearchController

var searchController: UISearchController!
func configureSearchController() {
        // Initialize and perform a minimum configuration to the search controller.
        searchController = UISearchController(searchResultsController: nil)
        searchController.searchResultsUpdater = self
        searchController.dimsBackgroundDuringPresentation = false
        searchController.searchBar.placeholder = "Search here..."
        searchController.searchBar.delegate = self
        searchController.searchBar.sizeToFit()

        // Place the search bar view to the tableview headerview.
        tblSearchResults.tableHeaderView = searchController.searchBar
    }