Ios UIPickerView的完成按钮不'；行不通

我试图将“完成”按钮放在我的选取器视图中，因为当我滑动选择一个项目时，uipickerview会自动选择滑动的行，所以我更希望按钮完成：

@IBOutlet var tfProjet: UITextField!
var pvProjetData = ["-Choisir-", "Rachat de crédits", "Renégociation de crédits"]
override func viewDidLoad() {

    super.viewDidLoad()

    let pickerView = UIPickerView()

    if DeviceType.IS_IPHONE_4_OR_LESS {
        pickerView.frame=CGRectMake(0, 200, view.frame.width, 100)
    } else if DeviceType.IS_IPHONE_5 {
        pickerView.frame=CGRectMake(0, 200, view.frame.width, 200)
    } else if DeviceType.IS_IPHONE_6 {
        pickerView.frame=CGRectMake(0, 200, view.frame.width, 200)
    } else if DeviceType.IS_IPHONE_6P {
        pickerView.frame=CGRectMake(0, 200, view.frame.width, 250)
    } else if UIDevice.currentDevice().userInterfaceIdiom == .Pad {
        pickerView.frame=CGRectMake(0, 200, view.frame.width, 300)
    }

    //        pickerView.backgroundColor = .whiteColor()

    pickerView.showsSelectionIndicator = true
    pickerView.delegate = self
    pickerView.dataSource = self
    self.pickerView = pickerView


        let pickerToolBar = UIToolbar()
        pickerToolBar.barStyle = UIBarStyle.Black //you can change the style
        pickerToolBar.translucent = true
        pickerToolBar.tintColor = UIColor.whiteColor() // or other colours
        pickerToolBar.sizeToFit()

        let spaceButtonPicker = UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.FlexibleSpace, target: nil, action: nil)
        let cancelButtonPicker = UIBarButtonItem(title: "Ok", style: UIBarButtonItemStyle.Plain, target: self, action: "cancelDatePicker:")
        pickerToolBar.setItems([cancelButtonPicker, spaceButtonPicker], animated: false)
        pickerToolBar.userInteractionEnabled = true
        tfDateNaissance.inputAccessoryView = pickerToolBar



        tfProjet.inputView = pickerView


        tfProjet.inputAccessoryView = pickerToolBar
}

func numberOfComponentsInPickerView(pickerView: UIPickerView) -> Int{
    return 1
}


func selectRow(row: Int, inComponent component: Int, animated: Bool){

}

func updatePicker(){
    self.pickerView!.reloadAllComponents()
    pickerView.selectRow(0, inComponent: 0, animated: false)
}

func pickerView(pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {

    if tfProjet.isFirstResponder(){
        return pvProjetData.count
    }
    return 1
}

func pickerView(pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {

    if tfProjet.isFirstResponder(){
        return pvProjetData[row]
    }
    return ""
}

func pickerView(pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {

    if tfProjet.isFirstResponder(){
        let itemselected = pvProjetData[row]
        tfProjet.text = itemselected
        self.tfProjet.endEditing(true)
    }
}

---

我看到按钮Ok，但它不起作用，当我滑动时，行被自动选中。

您可以选择一个

整数类型的变量。在选择器视图的
didSelectRow
委托
中，将变量的值更改为选择器视图的
行
。按您已经做的操作创建工具栏，并设置按钮的操作。无论您在
didSelectRow中执行什么操作，请在按钮上单击操作。您没有为“确定”按钮设置任何
目标操作。您需要设置一个在按下
OK
时调用的函数，这样您就可以
退出FirstResponder
或
popViewController
或在按下该按钮时希望它执行的任何操作。@MatthewLawrenceBailey您正在谈论的是“func cancelDatePicker”（发送方：UIBarButtonItem）{if tfProjet.isFirstResponder（）{tfProjet.resignFirstResponder（）}`是的，我只是在代码中没有看到这个函数。你设置了断点并确保func被调用了吗？@MatthewLawrenceBailey这个动作：“cancelDatePicker:”看起来很有效；但我的picker视图仍然没有出现