我已经实现了新SearchController
及其searchBar
和searchResultsController
。
这是我如何实现它:
结果视图控制器:
lazy var resultViewController: SearchResultViewController = {
let storyboard = UIStoryboard.init(name: "Main", bundle: nil)
let searchResultViewController = storyboard.instantiateViewController(withIdentifier: "SearchResultViewController") as! SearchResultViewController
searchResultViewController.delegate = self
return searchResultViewController
}()
这是SearchController:
lazy var searchController: UISearchController = {
let searchController = UISearchController(searchResultsController: resultViewController)
searchController.searchBar.delegate = self
searchController.obscuresBackgroundDuringPresentation = true
searchController.searchResultsUpdater = self
searchController.searchBar.placeholder = "Search.city.label".localizable()
searchController.searchBar.tintColor = UIColor.white
searchController.searchBar.barTintColor = UIColor.white
UITextField.appearance(whenContainedInInstancesOf: [type(of: searchController.searchBar)]).tintColor = UIColor(red:0.00, green:0.47, blue:0.78, alpha:1.0)
if let textfield = searchController.searchBar.value(forKey: "searchField") as? UITextField {
if let backgroundview = textfield.subviews.first {
// Background color
backgroundview.backgroundColor = UIColor.white
// Rounded corner
backgroundview.layer.cornerRadius = 10;
backgroundview.clipsToBounds = true;
}
}
definesPresentationContext = true
return searchController
}()
在我的viewWillAppear
中,我设置了navigationItem.searchController :
self.searchController.isActive = true
if #available(iOS 11.0, *) {
self.navigationItem.searchController = searchController
self.navigationItem.hidesSearchBarWhenScrolling = true
} else {
// Fallback on earlier versions
}
我已经能够处理取消按钮点击:
extension HomeViewController: UISearchBarDelegate {
func searchBarCancelButtonClicked(_ searchBar: UISearchBar) {
searchBar.endEditing(true)
self.searchController.isActive = false
}
}
这是在执行"取消"动画,隐藏键盘+搜索栏/搜索控制器上的非活动状态。两者同时进行,只需点击 1 次取消按钮。
但是当用户点击视图上的任意位置时,我无法实现此目的。
我尝试使用点击手势,但它需要我 2 次点击才能实现相同的行为。
铌:
我在UIViewController中得到了一个UICollectionView,它在UIView中占据了所有位置。
这是我尝试过的:
override func viewDidLoad() {
super.viewDidLoad()
handleTapAnywhereToRemoveKeyboard()
}
func handleTapAnywhereToRemoveKeyboard() {
let singleTapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(self.singleTap(sender:)))
//singleTapGestureRecognizer.numberOfTapsRequired = 1
singleTapGestureRecognizer.cancelsTouchesInView = false
self.view.addGestureRecognizer(singleTapGestureRecognizer)
}
@objc func singleTap(sender: UITapGestureRecognizer) {
self.searchController.isActive = false
self.searchController.searchBar.resignFirstResponder()
self.searchController.searchBar.endEditing(true)
}
编辑:
我在想,也许是因为我的搜索栏和搜索控制器不在UIViewController的视图层次结构中,而是在导航控制器中
。所以我也尝试了:
navigationController?.view.endEditing(true)
然后我在想,也许是因为我的UICollectionView中的UIScrollView正在捕捉到点击。 所以我尝试在UICollectionView而不是UIView上链接点击手势,但没有成功。
没有必要像上面建议的那样添加UITapGestureRecognizer
。UIViewContoller
已经符合UIResponder
接口(来自 Objective C 的旧版(,因此您可以像这样覆盖此方法:
extension UIViewController {
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
self.view.window?.endEditing(true)
super.touchesEnded(touches, with: event)
}
}
请创建UIViewController
以关闭键盘应用程序。
extension UIViewController {
func hideKeyboardWhenTappedAround() {
let tap: UITapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(UIViewController.dismissKeyboard))
tap.cancelsTouchesInView = false
view.addGestureRecognizer(tap)
}
@objc func dismissKeyboard() {
view.endEditing(true)
}
}
在UIViewController
文件中使用上面的代码,如下所示。
override func viewDidLoad() {
super.viewDidLoad()
self.hideKeyboardWhenTappedAround()
}
更新:
您还可以使用以下代码从任何类中关闭键盘。
UIApplication.shared.sendAction(#selector(UIResponder.resignFirstResponder), to: nil, from: nil, for: nil)
尝试Dimple Desai的解决方案,但将手势识别器添加到TableView或CollectionView或UIView之上的任何内容。那么它应该可以工作。
override func viewDidLoad(){
let tapView = UITapGestureRecognizer(target: self, action: #selector(self.hideKeyboard))
self.view.addGestureRecognizer(tapView)
}
@objc func hideKeyboard(tap: UITapGestureRecognizer){
self.view.endEditing(true)
}