Ionic build iOS not updating platform files with latest changes


I’m having problems emulating an app. Created a starter side menu app which I customised. Whilst this works on the browser & ionic view, the app still shows as the default starter app in iOS simulator. All customisations are not being reflected ( simple UI views). When I perform “ionic build iOS” noticed the files in www platform folder are not being updated with changes and new views and js files are not copied over.

I removed the platform and then added and ran ionic build ios, but not working. Using latest ionic. What am I missing? Please help.

Using Xcode 7 OS X El Capitan & latest ionic & Cordova.