How do you configure multiple iOS URL Schemes

Question

Is it possible to register multiple URL schemes that are associated with different app ids for the same app. For example I have separate apps per environment of my application each with their own unique bundke id. E.G

com.test.app-dev (testapp-dev://)
com.test.app-qa (testapp-qa://)
com.test.app (testapp://)

If I want to launch the dev app from a url, I would use want to use testapp-dev://

Answer 1

What I did (in Xcode 12)

Targets -> Your App -> Build Settings -> + -> Add User-Defined setting ->

Setting: URL_SCHEME

Value: yourapp-debug, yourapp, yourapp-test etc. for different schemes.

Targets -> Your App -> Info -> URL Types

URL Schemes: $(URL_SCHEME)

Answer 2

As @Paulw11 suggested this needed to be done at build time. For each application environment, I have an associated Xcode Scheme. In the build section of the xcode shceme, you can configure a postbuild action. You can execute a shell script as a post build action.

So for example in the com.test.app-dev scheme, there is a post build action that runs this script

/usr/libexec/PlistBuddy -c "set :CFBundleURLTypes:0:CFBundleURLSchemes:0 testapp-dev" "$BUILT_PRODUCTS_DIR/$INFOPLIST_PATH"
/usr/libexec/PlistBuddy -c "set :CFBundleURLTypes:0:CFBundleURLName com.test.app-dev" "$BUILT_PRODUCTS_DIR/$INFOPLIST_PATH"

Then in the com.test.app-qa scheme, there is a post build action that runs this script:

/usr/libexec/PlistBuddy -c "set :CFBundleURLTypes:0:CFBundleURLSchemes:0 testapp-qa" "$BUILT_PRODUCTS_DIR/$INFOPLIST_PATH"
/usr/libexec/PlistBuddy -c "set :CFBundleURLTypes:0:CFBundleURLName com.test.app-qa" "$BUILT_PRODUCTS_DIR/$INFOPLIST_PATH"

This ensures that the right custom url scheme is registered per application associated with each environment.