我一直在到处找这个,但我似乎找不到。我知道如何解雇使用Objective-C键盘,但我不知道如何使用Swift?有人知道吗?
当前回答
可以通过在AppDelegate的窗口属性中添加全局点击手势识别器来实现这一点。
这是一种非常全面的方法,对某些人来说可能不是理想的解决方案,但对我来说很有效。请让我知道这个解决方案是否有任何陷阱。
@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {
var window: UIWindow?
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
// Globally dismiss the keyboard when the "background" is tapped.
window?.addGestureRecognizer(
UITapGestureRecognizer(
target: window,
action: #selector(UIWindow.endEditing(_:))
)
)
return true
}
}
其他回答
import UIKit
class ItemViewController: UIViewController, UITextFieldDelegate {
@IBOutlet weak var nameTextField: UITextField!
override func viewDidLoad() {
super.viewDidLoad()
self.nameTextField.delegate = self
}
// Called when 'return' key pressed. return NO to ignore.
func textFieldShouldReturn(textField: UITextField) -> Bool {
textField.resignFirstResponder()
return true
}
// Called when the user click on the view (outside the UITextField).
override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {
self.view.endEditing(true)
}
}
下面是关于如何在Xcode 6.1中使用Swift消除键盘的回答:
import UIKit
class ItemViewController: UIViewController, UITextFieldDelegate {
@IBOutlet var textFieldItemName: UITextField!
@IBOutlet var textFieldQt: UITextField!
@IBOutlet var textFieldMoreInfo: UITextField!
override func viewDidLoad() {
super.viewDidLoad()
textFieldItemName.delegate = self
textFieldQt.delegate = self
textFieldMoreInfo.delegate = self
}
...
/**
* Called when 'return' key pressed. return NO to ignore.
*/
func textFieldShouldReturn(textField: UITextField) -> Bool {
textField.resignFirstResponder()
return true
}
/**
* Called when the user click on the view (outside the UITextField).
*/
override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {
self.view.endEditing(true)
}
}
(此信息的来源)。
为了扩展Esqarrouth的答案,我总是使用以下方法来解除键盘,特别是如果我正在解除键盘的类没有view属性和/或不是UIView的子类。
UIApplication.shared.keyWindow?.endEditing(true)
并且,为了方便起见,下面是uiapplication类的扩展:
extension UIApplication {
/// Dismisses the keyboard from the key window of the
/// shared application instance.
///
/// - Parameters:
/// - force: specify `true` to force first responder to resign.
open class func endEditing(_ force: Bool = false) {
shared.endEditing(force)
}
/// Dismisses the keyboard from the key window of this
/// application instance.
///
/// - Parameters:
/// - force: specify `true` to force first responder to resign.
open func endEditing(_ force: Bool = false) {
keyWindow?.endEditing(force)
}
}
斯威夫特3:
扩展选择器作为参数,能够做额外的东西在解散函数和cancelsTouchesInView,以防止扭曲与触摸的其他元素的视图。
extension UIViewController {
func hideKeyboardOnTap(_ selector: Selector) {
let tap: UITapGestureRecognizer = UITapGestureRecognizer(target: self, action: selector)
tap.cancelsTouchesInView = false
view.addGestureRecognizer(tap)
}
}
用法:
override func viewDidLoad() {
super.viewDidLoad()
self.hideKeyboardOnTap(#selector(self.dismissKeyboard))
}
func dismissKeyboard() {
view.endEditing(true)
// do aditional stuff
}
Dash的回答是正确的。一个更“焦土”的方法是调用view. enditing (true)。这将导致视图及其所有子视图resignFirstResponder。如果您没有想要删除的视图的引用,这是一种俗气但有效的解决方案。
请注意,我个人认为你应该有一个引用的视图,你想要有辞职第一响应者. enditing (force: Bool)是一个野蛮的方法;请不要使用它。
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