当重点从 ios 的 xamarin 表单中的材料输入控件中删除下划线时

Question

using Xamarin.Forms;
using Xamarin.Forms.Platform.iOS;
using Xamarin.Forms.Material.iOS;
using MyApp.iOS;
using MyApp;
using UIKit;
using System.ComponentModel;

[assembly: ExportRenderer(typeof(CustomMaterialEntry), typeof(CustomMaterialEntryRenderer), new[] { typeof(VisualMarker.MaterialVisual) })]

namespace MyApp.iOS
{
public class CustomMaterialEntryRenderer : MaterialEntryRenderer
{
/// <summary>
/// Element Changed Event
/// </summary>
protected override void OnElementChanged(ElementChangedEventArgs<Entry> e)
{
base.OnElementChanged(e);

if (this.Control != null)
{
 UITextField UpdatedEntry = (UITextField)Control;
 UpdatedEntry.Background = null;
 UpdatedEntry.BackgroundColor = UIColor.Clear;
}
}
  protected override void OnElementPropertyChanged(object sender, PropertyChangedEventArgs e)
 {
  base.OnElementPropertyChanged(sender, e);
  if (this.Control != null)
   this.Control.Underline.Color = UIColor.Clear;
  }
}
}

对于 android，它可以工作，但是当专注于 ios 中的材料条目时，它会显示有下划线。请帮我删除 ios 中 xamarin.forms 的下划线

Answer 1

尝试将活动下划线高度设置为0f：

protected override void OnElementChanged(ElementChangedEventArgs<Entry> e)
    {
        base.OnElementChanged(e);
        if (this.Control != null)
        {
            Control.ActiveTextInputController.UnderlineHeightActive = 0f;
        }
    }