iOS - Notification of when a call is taking place?

Question

Is it possible to be notified or detect when a GSM/CDMA call is taking place on an iOS handset?

I have an application that uses audio in the background and I want to be able to detect when a call is taking place so that my app can react accordingly so as not to intrude on the cellular call in anyway.

Essentially I want to be able to detect when a call is taking place so that if the user enters my application while on a call I can disable some functionality.

So I was wondering how I can detect that a cellular call is taking place on a device?

score 9 · Accepted Answer · answered Sep 23 '11 at 15:04

9

As of iOS 4, you can use the CTCallCenter class in the Core Telephony framework to register an event handler so your app gets notified when a call starts or ends. The CTCall it gives you has a callState property, which can be CTCallStateDialing, CTCallStateIncoming, CTCallStateConnected, or—when it ends—CTCallStateDisconnected.

answered Sep 23 '11 at 15:04

Noah Witherspoon

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Is there a way to get the phone number of an incoming call? – Mark Nov 04 '11 at 22:41
not working, do I need to update the plist also? like register for a background process .... – shebelaw Mar 09 '14 at 19:12
Not sure if this helps anyone but I just didn't want to animate a UIView if a call was taking place and this check worked perfect: if (callCenter.currentCalls == nil).....with callCenter being an instance of CTCallCenter. – Jason Renaldo Apr 15 '14 at 01:57
Will it be approved by Apple Review team? – PGU Jul 04 '14 at 06:20

score 2 · Answer 2 · answered Jul 07 '15 at 21:02

As of iOS 6, you should:

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(onAudioInterruption:) name:AVAudioSessionInterruptionNotification object:session

and then:

- (void)onAudioInterruption:(NSNotification*)notification
{
    NSDictionary *info = notification.userInfo;
    NSUInteger type = [[info valueForKey:AVAudioSessionInterruptionTypeKey] unsignedIntegerValue];

    if (type == AVAudioSessionInterruptionTypeBegan) {
        // stop audio (or whatever)
    } else if (type == AVAudioSessionInterruptionTypeEnded) {
        // restart audio (or whatever)
    }
}

score 1 · Answer 3 · answered Sep 23 '11 at 15:02

1

Look at AVAudioSessionDelegate protocol.

answered Sep 23 '11 at 15:02

MarrLiss

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Thanks, I already have implemented that but it only appears to work if the user is using my app and then I get an incoming call, if my app is not in use, the user makes a call and then goes to my app during the call I want to disable some options at that stage. – Donal Rafferty Sep 23 '11 at 15:10

score 0 · Answer 4 · edited May 23 '17 at 12:19

0

You can use CoreTelephony framework.But you must user some private api.And I have some demo code for this. https://github.com/edison0951/AppNotifyBySMSDemo. And the finally solution is MAP.this is the same with SMS notifications in iOS6

edited May 23 '17 at 12:19

Community

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answered Jul 11 '14 at 08:57

riven

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iOS - Notification of when a call is taking place?

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