xcode - Replace ios app with completely new version -

i have app on app store

i built app b scratch , replace b

in order test conflicts i'd install app on iphone (from store) attempt install b xcode.

follow below steps:

1)install app app store on device.

2)create archive of app b.

make sure following points while creating app b use.

• build version of app b should greater of app a.
• the same bundle identifier of app should used app b.

3)connect device on app downloaded.using itunes update app app b.

note : if have used core data in app a,you need careful migration process if have updated in app b.