self.centerCall = [[CTCallCenter alloc] init];

self.centerCall.callEventHandler = ^(CTCall * call){//TODO:检测到来电后的处理

NSLog(@"监听电话 :%@",call.callState);

};

CTCallCenter *callCenter = [[CTCallCenter alloc] init];

callCenter.callEventHandler = ^(CTCall* call) {

if ([call.callState isEqualToString:CTCallStateDisconnected])

{

NSLog(@"Call has been disconnected");

}

else if ([call.callState isEqualToString:CTCallStateConnected])

{

NSLog(@"Call has just been connected");

}

else if([call.callState isEqualToString:CTCallStateIncoming])

{

NSLog(@"Call is incoming");

}

else if ([call.callState isEqualToString:CTCallStateDialing])

{

NSLog(@"call is dialing");

}

else

{

NSLog(@"Nothing is done");

}

};