I\'m trying to link GA\'s User ID feature to my iOS app, but this doesn\'t seem to be working. From the documentation, I enables a User ID capable view (profile). Then, I set th
You cannot see the user id in Google Analytics at all. It's only there to unify data across devices. To view the user id, try adding a custom dimension which also records user id. Then you'll have access to view it in the interface.
More details on adding custom dimensions to send user IDs to Google Analytics.