[Linphone-developers] Implement iOS Background Mode for incoming call

[Xaree]

Dear all,


I use Linphone C API to write an iOS VoIP app. After I did add some code 
for background mode, it still can't receive incoming call in background. 
I'm not sure what the problem is. Hope someone can provide hints for me.

I did the following jobs from the official docs 
(http://www.linphone.org/docs/liblinphone/group__IOS.html) for the 
background mode in iOS:

1. add `voip` and `audio` value in the .plist for background mode.
2. refresh register and call `-setKeepAliveTimeout:handler:` in 
UIApplicationDelegate method `-applicationDidEnterBackground:`.

Did I miss something?

Is there any minimal example to implement the background incoming call 
(not the big linphone-iphone project)?

I don't understand how the official linphone-iphone project implements 
the background incoming call. After removing the 
`-setKeepAliveTimeout:handler:` implementation, the official 
linphone-iphone app still can receive the background incoming call.


Best regards,
Xaree