I have plans to develop an application through which can make a call and then do some specific activities when an incoming call arrives or when a number is dialed or when a connection is established, or terminated.
This can be done by using CTCallCenter as it claimed in the developer's site. But I think that when all these events occur, the Application would be in background state. So How can the Applications get the events? For Audio playing, VOIP, we can set a Application parameter in info.plist to notify this to App. But for Core Telephny, how can we do it?