When exporting to an iOS Device all related files and available plugins are packaged into a single application for the device. Since this is the case there is no need to set up environment variables or specify runtime options on the target, since this will all be done in Storyboard Designer when you export the application.
To configure an iOS device to run your apps you need to set up a few things from Apple first:
iOS developer account
A code signing certificate
The device ID of the Apple products you will be running on
The identifiers of the applications you will be making
A provisioning profile