I am trying to get our Sencha Touch app packaged and running for iOS. When running in the simulator the app starts and shows the splash screen, then fades out and I am left with a grey gradient on screen. I have tried adding a message box at the start of launch but this doesn't appear.

The app works fine on Android and if I copy the URL from the XCode output and paste into Chrome, it shows fine.

Using Touch 2.4.2, XCode 7.2.1, Codova 6.2.0 with platform ios 4.2.0.
Other cordova plugins:
cordova-plugin-barcodescanner 0.7.0 "BarcodeScanner"
cordova-plugin-device 1.1.2 "Device"
cordova-plugin-inappbrowser 1.4.0 "InAppBrowser"
cordova-plugin-splashscreen 3.2.2 "Splashscreen"
cordova-plugin-statusbar 2.0.0 "StatusBar"
cordova-plugin-whitelist 1.2.2 "Whitelist"

Thanks for any help.