在swift中使用UITextField的UILongPressGestureRecognizer

Question

是否可以在UITextField上使用UILongPressGestureRecognizer而不觸發字段編輯，同時仍能在常規點擊中編輯文本字段？

我曾嘗試在UITextField中添加長按手勢識別器，但長按似乎只能在很短的時間內完成。

init(frame: CGRect, userCompany: WLUserCompany) {
    super.init(frame: frame)

    var textField: UITextField?

    var longPress = UILongPressGestureRecognizer(target: self, action: #selector(self.longPress(gesture:)))
    textField?.addGestureRecognizer(longPress)

    self.addSubview(textField!)
}


@objc func longPress(gesture: UILongPressGestureRecognizer) {            
    if gesture.state == UIGestureRecognizerState.began {
        print("Long Press")
    }
}

Answer 1

創建UIGestureRecognizer的子類

import UIKit.UIGestureRecognizerSubclass

class TouchGestureRecognizer: UIGestureRecognizer {

    var isLongPress: Bool = false
    fileprivate var startDateInterval: TimeInterval = 0

    override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent) {
        super.touchesBegan(touches, with: event)
        state = .began
        self.startDateInterval = Date().timeIntervalSince1970
    }

    override func touchesEnded(_ touches: Set<UITouch>, with event: UIEvent) {
        super.touchesEnded(touches, with: event)
        state = .ended
        self.isLongPress = (Date().timeIntervalSince1970 - self.startDateInterval) > 1.0
    }
}

將手勢recognizer添加到textField

let gesture = TouchGestureRecognizer(target: self, action: #selector(ViewController.textFiledPressed(gesture:)))
        self.textField?.addGestureRecognizer(gesture)

現在你可以檢查textFiledPressed(gesture:)功能，如果長按或不按

func textFiledPressed(gesture: TouchGestureRecognizer) {
    switch gesture.state {
    case .ended:
        if gesture.isLongPress {
            //Do whatever you need
        } else {
            self.textField?.becomeFirstResponder()
        }

    default: break
    }

}

Answer 2

在這里和這里看到類似的SO，並試驗自己之后，我認為這是不可能的 - 至少你描述你的意圖的方式。

我能夠使用手勢控制添加背景視圖，但手勢與文本字段上的用戶交互沖突。 文本字段旁邊的按鈕不會創建更好的用戶體驗嗎？

FWIW，這是使用雙擊添加背景UIView的代碼。 長按手勢也有同樣的結果

 @IBOutlet weak var backgroundView: UIView!
    @IBOutlet weak var textField: UITextField!

    override func viewDidLoad() {
        super.viewDidLoad()
        let tapGesture = UITapGestureRecognizer(target: self, action: #selector(self.myTextFieldTapped))
        tapGesture.numberOfTapsRequired = 2
        backgroundView.addGestureRecognizer(tapGesture)
    }

    @objc func myTextFieldTapped() {
        print("Double tapped on textField")
    }

這是故事板的圖像：