无法创建 Xamarin Forms Picker 自定义渲染器

Question

您好，我很容易为 Forms Entry 控件创建自定义呈现器，但是当我尝试为 Picker 创建一个时，我收到此错误：

Error CS0115: `Punteam.iOS.PunteamPickerRederer.OnElementChanged(Xamarin.Forms.Platform.iOS.ElementChangedEventArgs<Xamarin.Forms.Picker>)' is marked as an override but no suitable method found to override (CS0115) (Punteam.iOS)

这是我在 Forms 项目上的代码：

using System;
using Xamarin.Forms;

namespace Punteam
  {
  public class PunteamPicker : Picker
  {
 }
}

在 IOS 项目上：

using Xamarin.Forms.Platform.iOS;
using Xamarin.Forms;
using Xamarin.Forms.Platform;
using Punteam;
using Punteam.iOS;
using UIKit;
using EventKitUI;

[assembly: ExportRenderer (typeof(PunteamPicker),      typeof(PunteamPickerRederer))]

namespace Punteam.iOS
{

public class PunteamPickerRederer : PunteamPicker
{
    protected override void OnElementChanged     (ElementChangedEventArgs<Picker> e)
{
/* base.OnElementChanged (e);

    this.Control.TextAlignment = MonoTouch.UIKit.UITextAlignment.Center;

    this.Control.TextColor = UIColor.White;

    this.Control.BackgroundColor = UIColor.Clear;
    this.Control.BorderStyle = UITextBorderStyle.RoundedRect;
    this.Layer.BorderWidth = 1.0f;
    this.Layer.CornerRadius = 4.0f;
    this.Layer.MasksToBounds = true;
    this.Layer.BorderColor = UIColor.White.CGColor;*/
   }
 }
}

有人知道为什么我会收到此错误吗？

Answer 1

public class PunteamPickerRederer : PunteamPicker

应该是

public class PunteamPickerRederer : PickerRenderer

无法创建 Xamarin Forms Picker 自定义渲染器

Can't create Xamarin Forms Picker custom rendere

custom-controls

ios

xamarin

xamarin.forms