WebChannel + WebSocket + WebView in iOS

Hi , 

     would like to report on this , i add webchannel + websocket on my mobile app 

it works on android but on ios it seems that webview for ios is blocking the connection to its localhost , 

i followed the instructions here https://decovar.dev/blog/2018/07/14/html-from-qml-over-webchannel-websockets/ 

and check all platform , linux , mac , windows , android and got positive result but only ios is negative . 

i already added this nstransportsecurity 

        <key>NSAppTransportSecurity</key>
        <dict>
            <key>NSAllowsArbitraryLoads</key>
            <true/>
            <key>NSAllowsLocalNetworking</key>
            <true/>
            <key>NSAllowsArbitraryLoadsInWebContent</key>
            <true/>
            <key>NSExceptionDomains</key>
            <dict>
              <key>127.0.0.1</key>
              <dict>
                <key>NSTemporaryExceptionAllowsInsecureHTTPLoads</key>
                <true/>
              </dict>
              <key>localhost</key>
              <dict>
                <key>NSTemporaryExceptionAllowsInsecureHTTPLoads</key>
                <true/>
              </dict>
            </dict>
        </dict>

but still not working , am i missing something ? thank you