iOS 监听手机来电状态

//CoreTelephony.framework

#import  

#import 

@property(nonatomic,strong)CTCallCenter*callCenter;

callCenter此参数必须为成员变量，要不然在ARC编译环境下，在这个函数之后就会被销毁，无法正常监听来电状态！

self.callCenter= [[CTCallCenteralloc]init];

self.callCenter.callEventHandler= ^(CTCall* call) {

if([call.callStateisEqualToString:CTCallStateDisconnected])

{

NSLog(@"Call has been disconnected");

}

elseif([call.callStateisEqualToString:CTCallStateConnected])

{

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

}

elseif([call.callStateisEqualToString:CTCallStateIncoming])

{

NSLog(@"Call is incoming");

}

elseif([call.callStateisEqualToString:CTCallStateDialing])

{

NSLog(@"call is dialing");

}

else

{

NSLog(@"Nothing is done");

}

};