xamarin.ios - Implement error handling and script messages receiving in one WebViewRenderer in Xamarin IOs -

now have code web view renderer like:

 public sealed class mywebviewrenderer : viewrenderer<webview, wkwebview>, iwkscriptmessagehandler     {         private const string scriptmessagehandlername = "native";         private wkusercontentcontroller usercontroller;         private wkwebview m_nativeview;          protected override void onelementchanged(elementchangedeventargs<webview> e)         {             base.onelementchanged(e);              var visualwebview = (imwebview)element;              if (control == null && e.newelement != null)             {                  this.usercontroller = new wkusercontentcontroller();                 var config = new wkwebviewconfiguration                 {                     usercontentcontroller = this.usercontroller                 };                  this.usercontroller.addscriptmessagehandler(this, scriptmessagehandlername);                  m_nativeview = new wkwebview(this.frame, config) { weaknavigationdelegate = new imnavigationdelegate()};                   setnativecontrol(m_nativeview);     }          public void didreceivescriptmessage(wkusercontentcontroller usercontentcontroller, wkscriptmessage message)         {         ...         } } 

this class allows me receive messages js. want receive message page loading failed. i've found way - use xamarin.forms.platform.ios.webviewrenderer base class renderer , use

public sealed class mywebviewrenderer : xamarin.forms.platform.ios.webviewrenderer  {      protected override void onelementchanged(visualelementchangedeventargs e)     {         base.onelementchanged(e);          var visualwebview = (imwebview)element;              if (this.viewcontroller == null && e.newelement != null)             {                 base.delegate = new customnavigationdelegate() { control = visualwebview };         }              ...      }        public class customnavigationdelegate : uiwebviewdelegate     {         public imwebview control { get; set; }          public override void loadfailed(uiwebview webview, nserror error)         {           ...         }     }  } 

load failing capture working well, code couldn't messages js. there way both loadfailed event , messages js code in 1 class?

i recommend continue using renderer inheriting wkwebview. can use didfailnavigation virtual method in wknavigationdelegate callbacks when there error while navigating. can use below

public sealed class mywebviewrenderer : viewrenderer<webview, wkwebview>, iwkscriptmessagehandler {     private const string scriptmessagehandlername = "native";     private wkusercontentcontroller usercontroller;     private wkwebview m_nativeview;      protected override void onelementchanged(elementchangedeventargs<webview> e)     {         base.onelementchanged(e);          var visualwebview = (imwebview)element;          if (control == null && e.newelement != null)         {              this.usercontroller = new wkusercontentcontroller();             var config = new wkwebviewconfiguration             {                 usercontentcontroller = this.usercontroller             };              this.usercontroller.addscriptmessagehandler(this, scriptmessagehandlername);              m_nativeview = new wkwebview(this.frame, config) { weaknavigationdelegate = new navigationdelegate()};               setnativecontrol(m_nativeview);         }     }          public void didreceivescriptmessage(wkusercontentcontroller usercontentcontroller, wkscriptmessage message)         {          } } public class navigationdelegate : wknavigationdelegate {      public override void didfailnavigation( wkwebview webview, wknavigation navigation, nserror error )     {         // if navigation fails, gets called     } }