UITextField的resignFirstResponder無法正常工作self.view.endEditing（）

Question

我面對textField的一個荒謬的問題，我有兩個文本域，即tfA和tfB，我已經為那些文本字段設置了委托，我想要的是，如果我點擊tfA然后它應該打印一些東西，它就是打印如果我點擊tfB它應該出現在鍵盤上，它也運行良好，但是當我再次點擊tfA然后它應該打印一些東西，鍵盤應該根據那里給出的條件解散，但鍵盤並沒有在那里解雇self.view.endEditing(true)在這里不起作用。 代碼在下面給出屏幕截圖，我在這里做錯了什么？

代碼：Swift 3

import UIKit

class ViewController: UIViewController, UITextFieldDelegate {
    @IBOutlet weak var tfA: UITextField!
    @IBOutlet weak var tfB: UITextField!

    override func viewDidLoad() {
        super.viewDidLoad()

        tfA.delegate = self
        tfB.delegate = self
    }

    func textFieldDidBeginEditing(_ textField: UITextField) {
        if textField == tfA{
            print("TFA Clicked")
            textField.resignFirstResponder()
            self.view.endEditing(true)
        }else{
            tfB.becomeFirstResponder()
        }
    }

    func textFieldShouldReturn(_ textField: UITextField) -> Bool {
        textField.resignFirstResponder()

        return true
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }


}

截圖

Answer 1

嘗試這個

func textFieldShouldBeginEditing(_ textField: UITextField) -> Bool {
   if textField == tfA
   {
       self.view.endEditing(true)
       tfaAction()
       return false
   }
   else
   {
       return true
   }
}
func tfaAction(){

 }

Answer 2

刪除textFieldDidBeginEditing方法，將其替換為textFieldShouldBeginEditing ：

func textFieldShouldBeginEditing(_ textField: UITextField) -> Bool {
  if textField == tfA{
    print("TFA Clicked")
    self.view.endEditing(true)
    return false
  }else{
    return true
  }
}

Answer 3

Swift 4只檢查這個delegate是否存在然后它應該return true

`func textFieldShouldEndEditing(_ textField: UITextField) -> Bool {`


    //MARK:- Textfield Delegates //This is mandatory 
    func textFieldShouldReturn(_ textField: UITextField) -> Bool {
        self.view.endEditing(true)
        return true
    }

    //MARK:- This Delegate is option  but if this is exist in your code then return type shoud be true 
    func textFieldShouldEndEditing(_ textField: UITextField) -> Bool {

        return true
    }

Answer 4

運行textfield.resignFirstResponder()

所以一切都會像

textfield.resignFirstResponder()
self.view.endEditing(true)