I’ve found a solution but I have no idea why it’s working. Only thing I can think of is a bug in GCD and/or CoreTelephony.
Basically, I allocate two instances of CTCallCenter
like this
void (^block)(CTCall*) = ^(CTCall* call) { NSLog(@"%@", call.callState); };
-(BOOL)application:(UIApplication*)application didFinishLaunchingWithOptions:(NSDictionary*)launchOptions
{
callCenter1 = [[CTCallCenter alloc] init];
callCenter1.callEventHandler = block;
callCenter2 = [[CTCallCenter alloc] init];
callCenter2.callEventHandler = block;
return YES;
}
Similar Code in Swift:
func block (call:CTCall!) {
println(call.callState)
}
func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
//Declare callcenter in the class like 'var callcenter = CTCallCenter()'
callcenter.callEventHandler = block
return true
}
To test this I made a call, answered it and then hanged up it while app was in background. When I launched it I received 3 call events: incoming, connected, disconnected.