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
我更喜欢这样一句话:
view.addGestureRecognizer(UITapGestureRecognizer(target: self, action: "dismissKeyboardFromView:"))
只要把它放在override viewDidLoad函数中,不管你想让它发生在哪个子类UIViewController中,然后把下面的代码放在你的项目中的一个新的空文件中,名为“UIViewController+dismissKeyboard.swift”:
import UIKit
extension UIViewController {
// This function is called when the tap is recognized
func dismissKeyboardFromView(sender: UITapGestureRecognizer?) {
let view = sender?.view
view?.endEditing(true)
}
}
其他回答
在Swift 4中,添加@objc:
在viewDidLoad中:
let tap: UITapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(self.dismissKeyboard))
view.addGestureRecognizer(tap)
功能:
@objc func dismissKeyboard() {
view.endEditing(true)
}
我没有看到它被提到过,但是NotificationCenter可以告诉你键盘何时打开和关闭。例如,如果你想改变cancelsTouchesInView或一起删除手势识别器,这可以被使用。
例子:
var dismissKeyboardGestureRecognizer = UITapGestureRecognizer()
override func viewDidLoad() {
super.viewDidLoad()
//Setup dismiss keyboard gesture
self.dismissKeyboardGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(dismissKeyboard))
//Add Notifications
NotificationCenter.default.addObserver(self, selector: #selector(keyboardDidShow), name:UIResponder.keyboardDidShowNotification, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(keyboardDidHide), name:UIResponder.keyboardDidHideNotification, object: nil)
}
@objc func keyboardDidShow() {
dismissKeyboardGestureRecognizer.cancelsTouchesInView = true
view.addGestureRecognizer(dismissKeyboardGestureRecognizer)
}
@objc func keyboardDidHide() {
dismissKeyboardGestureRecognizer.cancelsTouchesInView = false
view.removeGestureRecognizer(dismissKeyboardGestureRecognizer)
}
@objc func dismissKeyboard() {
view.endEditing(true)
}
添加这个扩展到你的ViewController:
extension UIViewController {
// Ends editing view when touches to view
open override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
super.touchesBegan(touches, with: event)
self.view.endEditing(true)
}
}
我找到了一个简单的解决办法: 1. 添加UITapGestureRecognizer到你的视图控制器 2. 添加IBAction到你的UITapGestureRecognizer 3.最后,您可以放弃第一个响应器
class ViewController: UIViewController
{
@IBOutlet var tap: UITapGestureRecognizer!
@IBOutlet weak var label: UILabel!
@IBOutlet weak var textField: UITextField!
override func viewDidLoad()
{
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
}
@IBAction func dismissUsingGesture(_ sender: UITapGestureRecognizer)
{
self.textField.resignFirstResponder()
label.text = textField.text!
}
}
Swift 5只要两行就够了。添加到你的viewDidLoad应该工作。
let tapGesture = UITapGestureRecognizer(target: view, action: #selector(UIView.endEditing))
view.addGestureRecognizer(tapGesture)
如果你的点击手势阻止了一些其他的触摸,那么添加这一行:
tapGesture.cancelsTouchesInView = false
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