I am following the Trax app demo from Stanford\'s iOS lectures and the instructor set the app up to handle GPX files via AirDrop, but the iPhone simulator doesn\'t support A
You can add a GPX file to a project by opening the scheme editor: Product -> Scheme -> Edit Scheme. Under Options check the Allow Location Simulation box and from the dropdown choose Add GPX File to Workspace.
In order to generate a GPX file with your custom location you can use this.