无法从resignFirstResponder从UITextField

Question

你知道(你明白)为什么我不能从FirstResponder辞职并隐藏键盘吗？

FYI: Xcode 9

import UIKit

class ViewController: UIViewController, UITextFieldDelegate {

    @IBOutlet weak var label: UILabel!
    @IBOutlet weak var text: UITextField!

    override func viewDidLoad() {
        super.viewDidLoad()

        self.text.delegate = self
        let tap = UITapGestureRecognizer(target: self, action: #selector(ViewController.tapFunction))
        label.isUserInteractionEnabled = true
        label.addGestureRecognizer(tap)
    }

    var keyboardInputEnabled = true
    @objc func tapFunction(sender:UITapGestureRecognizer) {
        if self.keyboardInputEnabled {
            self.text.becomeFirstResponder()
        }else{
            self.view.endEditing(true)
            self.text.resignFirstResponder()
        }
        self.keyboardInputEnabled = !self.keyboardInputEnabled
    }

    func textFieldShouldReturn(_ textField: UITextField) -> Bool {
        return self.keyboardInputEnabled
    }

    func textFieldShouldEndEditing(_ textField: UITextField) -> Bool {
        return self.keyboardInputEnabled
    }

    func textFieldShouldBeginEditing(_ textField: UITextField) -> Bool {
        return self.keyboardInputEnabled
    }


    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
    }

}

Answer 1

因为textFieldShouldEndEditing在第二次运行tapFunction时返回false，这使得它无法结束编辑模式。

取自这

通常，您将从此方法返回true，以允许文本字段退出第一个响应状态。但是，如果委托检测到文本字段中的无效内容，则可能返回false。返回false会防止用户切换到另一个控件，直到文本字段包含有效值为止。

Answer 2

试一试

禁用键盘的self.view.endEditing(true)