How to handle session when a call is received

问题

Please can you tell me how to handle session when a call is received.

Actually I'm playing with an online radio station and I want to resume that after call has ended.

回答1:

To add core telephony notification to your program, include the following code and compile linking to the Core Telephony framework. This code adds your program as a registered observer.

id ct = CTTelephonyCenterGetDefault();
CTTelephonyCenterAddObserver(ct, NULL, callback, NULL, NULL, CFNotificationSuspensionBehaviorHold);

To monitor the incoming notifications, you need to build the callback routine you supplied as an argument to the add observer call:

static void callback(CFNotificationCenterRef center, void *observer, CFStringRef name, const void *object, CFDictionaryRef userInfo)
 { ... }

For more plz read Programmatically Handling iPhone interruptions

来源：https://stackoverflow.com/questions/5416330/how-to-handle-session-when-a-call-is-received