监听iPhone系统电话事件

#import <CoreTelephony/CTCallCenter.h>
#import <CoreTelephony/CTCall.h>

- (void)listenCallEvent
{
CTCallCenter *callCenter = [[CTCallCenter alloc] init];
[callCenter setCallEventHandler:^(CTCall *call) {
if (call.callState == CTCallStateConnected)
{
NSLog(@"Call has been connected!");
}
else if (call.callState == CTCallStateDisconnected)
{
NSLog(@"Call has been disconnected!");
}
else if (call.callState == CTCallStateIncoming)
{
NSLog(@"Call is incoming!");
}
else if (call.callState == CTCallStateDialing)
{
NSLog(@"Call is dialing!");
}
else
{
NSLog(@"None State!");
}
}];
}// listenCallEvent