NULL MPMediaitemPropertyAssetURL

Question

Using MPMediaQuery and then getting the MPMediaitemPropertyAssetURL from the song results sometimes returns null (and by sometimes I mean in this case, 1/3 of the users song library).

Does anyone know what causes this? I'm assuming that this is due to some sort of DRM, but it isn't documented anywhere.

Answer 1

This answer can respond to your question : https://stackoverflow.com/a/6401317/536308