Managing multiple environments in Xcode

MultipleEnvironments-iOS.txt

1. Duplicate Build Configurations from Project Settings
  - Example: Duplicate debug & name it as debugDev. Duplicate release & name it as releaseDev.

2. Change Project's bundle identifier from Target Build Settings
  - Change it to reflect build configurations
  
3. Create User Defined Settings 
  - There is + sign on navigation bar in Build Settings. Click on it & create User Defined Settings as needed
  - Example: If you need different names on different builds, add setting name APP_DISPLAY_NAME & so on.
  - You need to use this created settings on info.plist file. Eg, Change Bundle Display Name value to $(APP_DISPLAY_NAME).
 
4. Create any compilation flags if needed. 
  - You can create flags under Active Compilation Code Or Other Swift Flags
 
5. Create Schemes for build configurations
  - One rule of thumb is to create same number of schemes as per build configuration. So if there are App store & Development build configurations, the number of schemes is also 2.

Refer to these two links:

1. https://blog.lftechnology.com/multiple-targets-in-xcode-41ef168f7f4
2. https://medium.com/@danielgalasko/run-multiple-versions-of-your-app-on-the-same-device-using-xcode-configurations-1fd3a220c608