Answers

• njakubowicz Member ✭✭

  January 2019

  Is the above code getting called multiple times, from elsewhere?
  Also did your resolve your issue, as I am trying to debug a similar issue. But have not pinpointed any culprits in code yet.

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• Dooks ZAMember ✭✭✭

  January 2019

  No the problem was that, you need to ALWAYS respond after iOS handed your app control of the WiFi for the moment.

  This is was my code (dumbed down, removed all the checks if it is my wifi hotspot etc. but the following code should work perfectly):

      public Init()
      {
          NEHotspotHelperOptions options = new NEHotspotHelperOptions(NSDictionary.FromObjectAndKey(new NSString("My Wifi Avalable Here"), NEHotspotHelperOptionInternal.DisplayName));
          bool isAvailable = Register(options, DispatchQueue.MainQueue, HotspotHandler);
      }
  
      private void HotspotHandler(NEHotspotHelperCommand cmd)
      {
          NEHotspotHelperResponse response;
  
          try
          {
              var ScanResults = (cmd.NetworkList ?? new NEHotspotNetwork[0]).ToList();
              var ConnectedNetwork = SupportedNetworkInterfaces?.Last();
  
              switch (cmd.CommandType)
              {
                  case NEHotspotHelperCommandType.FilterScanList: // Set confidence on all hotspots is "My Wifi"
                      {
                          response = cmd.CreateResponse(NEHotspotHelperResult.Success);
  
                          var newList = ScanResults.Where(n => MyWiFiSSID == n.Ssid).ToList();
                          newList.ForEach(n => n.SetConfidence(NEHotspotHelperConfidence.High));
  
                          response.SetNetworkList(newList.ToArray());
  
                          response.Deliver();
  
                          break;
                      }
                  case NEHotspotHelperCommandType.Evaluate: // First Step "Evaluate" after a user connected to My Wifi Hotspot
                  case NEHotspotHelperCommandType.PresentUI:
                      {
                          ConnectedNetwork.SetConfidence(NEHotspotHelperConfidence.High);
  
                          response = cmd.CreateResponse(NEHotspotHelperResult.Success);
                          response.SetNetwork(ConnectedNetwork);
  
                          response.Deliver();
  
                          break;
                      }
                  case NEHotspotHelperCommandType.Authenticate: // Second Step "Authenticate" after Evaluate is done.
                  case NEHotspotHelperCommandType.Maintain: // Third Step "Maintain" - random step
                      {
                          ConnectedNetwork.SetConfidence(NEHotspotHelperConfidence.High);
  
                          response = cmd.CreateResponse(NEHotspotHelperResult.Success);
                          response.SetNetwork(ConnectedNetwork);
  
                          Authenticate(); // Do your network calls here -> Synchronously
  
                          response.Deliver();
  
                          break;
                      }
                  case NEHotspotHelperCommandType.Logoff:
                  case NEHotspotHelperCommandType.None:
                  default:
                      {
                          response = cmd.CreateResponse(NEHotspotHelperResult.Success);
                          response.Deliver();
                          break;
                      }
              }
          }
          catch (Exception ex)
          {
              response = cmd.CreateResponse(NEHotspotHelperResult.UnsupportedNetwork); // Error
              response.Deliver();
          }
      }
  

  For the Init() code to work, you need to have the following in your entitlements.plist file as well as tick it when provisioning in the apple dev console:

  <?xml version="1.0" encoding="UTF-8"?>
  <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
  <plist version="1.0">
  <dict>
      <key>com.apple.developer.networking.HotspotHelper</key>
      <true/>
  </dict>
  </plist>
  

  Then only will your app be able to register the handler in init()

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