How to deal with this error AVAudioSessionErrorCodeMissingEntitlement?

Question

I'm trying to integrate with iOS10's CallKit, however when I'm trying to initialize the audio session after accept a phone call, this "AudioUnitInitialize" API will throw out this error "AVAudioSessionErrorCodeMissingEntitlement". According to the document, it's just one line explanation: https://developer.apple.com/reference/avfoundation/avaudiosessionerrorcode/avaudiosessionerrorcodemissingentitlement

How should I update the entitlement for support this? Does any body has any experience?

Answer 1

I also ran into this issue in iOS10 Beta 6, and was able to resolve it by moving the "AudioUnitInitialize" API from the performAnswerCallAction: method (as implemented in SpeakerBox) to the init routine of the ProviderDelegate.

By moving initialization earlier in the lifecycle of the ProviderDelegate, somehow the 'entitlement' problem is avoided.