在Xamarin.Forms PCL中使用自定义WebView渲染器处理超链接

using Xamarin.Forms;

namespace YourNamespace
{
    public class CustomWebView : WebView
    {
        public static readonly BindableProperty UrlProperty = BindableProperty.Create(
            nameof(Url),
            typeof(string),
            typeof(CustomWebView),
            default(string));

        public string Url
        {
            get { return (string)GetValue(UrlProperty); }
            set { SetValue(UrlProperty, value); }
        }
    }
}

using Android.Content;
using Android.Webkit;
using YourNamespace;
using YourNamespace.Droid;
using Xamarin.Forms;
using Xamarin.Forms.Platform.Android;

[assembly: ExportRenderer(typeof(CustomWebView), typeof(CustomWebViewRenderer))]
namespace YourNamespace.Droid
{
    public class CustomWebViewRenderer : WebViewRenderer
    {
        public CustomWebViewRenderer(Context context) : base(context)
        {
        }

        protected override void OnElementChanged(ElementChangedEventArgs<WebView> e)
        {
            base.OnElementChanged(e);

            if (Control != null && e.NewElement is CustomWebView customWebView)
            {
                Control.SetWebViewClient(new CustomWebViewClient(customWebView));
            }
        }
    }

    public class CustomWebViewClient : WebViewClient
    {
        private readonly CustomWebView _customWebView;

        public CustomWebViewClient(CustomWebView customWebView)
        {
            _customWebView = customWebView;
        }

        public override bool ShouldOverrideUrlLoading(WebView view, IWebResourceRequest request)
        {
            var url = request.Url.ToString();
            // 处理超链接的逻辑
            // ...

            return base.ShouldOverrideUrlLoading(view, request);
        }
    }
}

using Foundation;
using UIKit;
using YourNamespace;
using YourNamespace.iOS;
using Xamarin.Forms;
using Xamarin.Forms.Platform.iOS;

[assembly: ExportRenderer(typeof(CustomWebView), typeof(CustomWebViewRenderer))]
namespace YourNamespace.iOS
{
    public class CustomWebViewRenderer : WebViewRenderer
    {
        protected override void OnElementChanged(VisualElementChangedEventArgs e)
        {
            base.OnElementChanged(e);

            if (NativeView != null && e.NewElement is CustomWebView customWebView)
            {
                Delegate = new CustomWebViewDelegate(customWebView);
            }
        }
    }

    public class CustomWebViewDelegate : UIWebViewDelegate
    {
        private readonly CustomWebView _customWebView;

        public CustomWebViewDelegate(CustomWebView customWebView)
        {
            _customWebView = customWebView;
        }

        public override bool ShouldStartLoad(UIWebView webView, NSUrlRequest request, UIWebViewNavigationType navigationType)
        {
            var url = request.Url.ToString();
            // 处理超链接的逻辑
            // ...

            return base.ShouldStartLoad(webView, request, navigationType);
        }
    }
}

<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             xmlns:local="clr-namespace:YourNamespace"
             x:Class="YourNamespace.MainPage">
    <StackLayout>
        <local:CustomWebView Url="https://www.example.com" />
    </StackLayout>
</ContentPage>