nativescript-demo/App_Resources/iOS/build.xcconfig

// You can add custom settings here
// for example you can uncomment the following line to force distribution code signing
// CODE_SIGN_IDENTITY = iPhone Distribution 
// To build for device with XCode you need to specify your development team.
// DEVELOPMENT_TEAM = YOUR_TEAM_ID;
ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;