textfields inputAccessory使用工具栏查看我的自定义选择器视图 - swift

Question

我有一个自定义的选择器视图，并连接两个文本字段。
但我对我的挑选者提出了一些疑问。

pickerview有一个工具栏和两个barbuttonitems（完成并取消）。
当我点击textfield1时。完成和完成取消没有采取行动 然后我点击textfield2。完成和完成取消也不要采取行动。
最后我回来点击textfield1。按钮叫我取消＆amp;功能成功。
我想问一下如何让我的按钮在第一次点击时间工作。

这是自定义pickerview中的代码：

import UIKit
import SnapKit

class PickerView: UIView {

var toolbar:UIToolbar       = UIToolbar()
var picker :UIPickerView    = UIPickerView()
var done   :UIBarButtonItem = UIBarButtonItem()
var cancel :UIBarButtonItem = UIBarButtonItem()


override init(frame: CGRect) {
    super.init(frame:frame)

    translatesAutoresizingMaskIntoConstraints = false
    loadContent()
}

func loadContent() {

    toolbar.sizeToFit()
    let flexSpace = UIBarButtonItem(barButtonSystemItem: .flexibleSpace, target: self, action: nil)
    toolbar.items = [cancel,flexSpace,done]
    addSubview(toolbar)
    addSubview(picker)
}

}

的ViewController

 import UIKit

 class ViewController: UIViewController , UIPickerViewDelegate , UIPickerViewDataSource {

  var textField1:UITextField = UITextField()  
  var textField2:UITextField = UITextField()  
  var pick1:PickerView = PickerView()
  var pick2:PickerView = PickerView()

    override func loadView() {
    super.loadView()

    loadElement()
    }

      func loadElement() {

       view.addSubview(textField1)
       view.addSubview(textField2)
    }
     override func viewDidLoad() {
     super.viewDidLoad()

      pick1.picker.delegate = self
      pick1.picker.dataSource = self
      pick2.picker.delegate = self
      pick2.picker.dataSource = self
      textField1.inputView = pick1.picker
      textField1.inputAccessoryView = pick1.toolbar
      textField2.inputView = pick2.picker
      textField2.inputAccessoryView = pick2.toolbar

      //pickerview setting
      pick1.picker.showsSelectionIndicator = true
      pick1.picker.tag = 0
      pick1.done.action = #selector(done1Clicked)
      pick1.cancel.action = #selector(cancel1Clicked)

      pick2.picker.showsSelectionIndicator = true
      pick2.picker.tag = 1
      pick2.done.action = #selector(done2Clicked)
      pick2.cancel.action = #selector(cancel2Clicked)

    }

    //don't call these functions !!!!!!

    func cancel1Clicked(sender:UIBarButtonItem) {

    textField1.resignFirstResponder()
    }

    func done1Clicked(sender:UIBarButtonItem) {

    textField1.resignFirstResponder()
    }

    func cancel2Clicked(sender:UIBarButtonItem) {

    textField2.resignFirstResponder()
    }

    func done2Clicked(sender:UIBarButtonItem) {

    textField2.resignFirstResponder()
    }

   }