你可以使用swift

override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
    super.touchesBegan(touches, with: event)
    view.endEditing(true)

}

这一行代码辞去了UIView中所有UITextField的键盘

self.view.endEditing(true)

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)
    }

}

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)
  }
}

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
    }
}

你可以使用swift

override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
    super.touchesBegan(touches, with: event)
    view.endEditing(true)

}