C# PickerView工具栏的“完成”按钮不工作

“完成”按钮添加到pickerview工具栏， 但单击完成按钮单击事件不起作用

    public override void ViewDidLoad(){
         myPickerView = new UIPickerView (RectangleF.Empty){
            AutoresizingMask = UIViewAutoresizing.FlexibleWidth,
            ShowSelectionIndicator = true,
            Model = model,
            Hidden = true,
            BackgroundColor = UIColor.Clear
        };

        toolbar = new UIToolbar();
        toolbar.BarStyle = UIBarStyle.Default;
        toolbar.Translucent = true;
        toolbar.SizeToFit();

// Create a 'done' button for the toolbar and add it to the toolbar
        UIBarButtonItem doneButton = new UIBarButtonItem("Done", UIBarButtonItemStyle.Done,
            (s, e) => {
                Console.WriteLine ("Calling Done!");
                txt_RegistrationType.Text = selectedType;
                txt_Email.ResignFirstResponder();
                txt_UserName.ResignFirstResponder();
                txt_Password.ResignFirstResponder();
                txt_PhoneNumber.ResignFirstResponder();
                txt_ConformPassword.ResignFirstResponder();
            });
        toolbar.SetItems(new UIBarButtonItem[]{doneButton}, true);
        model.PickerChanged += (sender, e) => {
            Console.WriteLine("selected vlaue {0}",e.SelectedValue);
            txt_RegistrationType.Text = e.SelectedValue;
        };

this.myPickerView.AddSubview (toolbar);
myPickerView.Frame = PickerFrameWithSize (myPickerView.SizeThatFits (SizeF.Empty));
View.AddSubview (myPickerView);
myPickerView.AddSubview (toolbar);
}

单击所选项目

它显示pickerView“pickerView.Hidden=false”，其中显示了带有“完成”按钮的选择器视图和工具栏。单击工具栏上的“完成”按钮时，其单击事件不起作用

    public override void ViewDidLoad(){
         myPickerView = new UIPickerView (RectangleF.Empty){
            AutoresizingMask = UIViewAutoresizing.FlexibleWidth,
            ShowSelectionIndicator = true,
            Model = model,
            Hidden = true,
            BackgroundColor = UIColor.Clear
        };

        toolbar = new UIToolbar();
        toolbar.BarStyle = UIBarStyle.Default;
        toolbar.Translucent = true;
        toolbar.SizeToFit();

// Create a 'done' button for the toolbar and add it to the toolbar
        UIBarButtonItem doneButton = new UIBarButtonItem("Done", UIBarButtonItemStyle.Done,
            (s, e) => {
                Console.WriteLine ("Calling Done!");
                txt_RegistrationType.Text = selectedType;
                txt_Email.ResignFirstResponder();
                txt_UserName.ResignFirstResponder();
                txt_Password.ResignFirstResponder();
                txt_PhoneNumber.ResignFirstResponder();
                txt_ConformPassword.ResignFirstResponder();
            });
        toolbar.SetItems(new UIBarButtonItem[]{doneButton}, true);
        model.PickerChanged += (sender, e) => {
            Console.WriteLine("selected vlaue {0}",e.SelectedValue);
            txt_RegistrationType.Text = e.SelectedValue;
        };

this.myPickerView.AddSubview (toolbar);
myPickerView.Frame = PickerFrameWithSize (myPickerView.SizeThatFits (SizeF.Empty));
View.AddSubview (myPickerView);
myPickerView.AddSubview (toolbar);
}

---

单击“完成”按钮获取事件时，请告知我。

首先，我想指出，您正在将“工具栏”添加到当前的“UIPickerView”中两次。一旦与：

this.myPickerView.AddSubview (toolbar);

另一次是：

myPickerView.AddSubview (toolbar);

其次，为什么使用工具栏？它只会增加项目的复杂性和依赖性

我的建议是废弃整个代码块，并在此视图上创建两个单独的控件：

钮扣

皮克维

public override void ViewDidLoad()
{
    UIButton button = new UIButton (new RectangleF (5, 5, frame_width, 30));
    button.TouchUpInside += Method;

    UIPickerView pickerView = new UIPickerView (new RectangleF (5, 45, frame_width, 180));
    pickerView.Model = model

    this.View.AddSubviews (new UIView[]{button, pickerView});
}

void Method (object sender, eventargs e)
{
    Console.WriteLine ("Done");
    /*If you want to make the pickerView disappear, 
    you can add a pickerView.Hide() here, and then call a method 
    to redraw the controls on the current view.*/
}

我希望这有帮助。祝你好运