iOS How to check if currently on phone call

Question

I have look around and all I can find is checking the callState of CTCallCenter. However, this works by listening to an event - which depending on whether the application is active/suspended/resumed the event can be raised at different time.

What I need is rather than listening to event and got told when call is connected, I want to decide myself when to ask if the call is connected.

Use case: When phone call is connected - user knows and will always click on the app icon, which will open the app. At this time I just want to run a quick function to check if currently on call or not.

Is this even possible?

ThomasW · Accepted Answer · 2012-06-08T02:42:50.323

28

The CTCallCenter object has a currentCalls property which is an NSSet of the current calls. If there is a call then the currentCalls property should be != nil.

If you want to know if any of the calls is actually connected, then you'll have to iterate through the current calls and check the callState to determine if it is CTCallStateConnected or not.

edited Jun 08 '12 at 02:42

answered Jun 08 '12 at 02:31

ThomasW

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awesome... just what I need thanks. If you guys think this question helps please upvote question as well. – friend Jun 08 '12 at 06:34
u saved my life – tatiana_c Sep 25 '16 at 16:53
''CTCallCenter' was deprecated in iOS 10.0: Replaced by CXCallObserver from CallKit.framework' – Awais Fayyaz Jul 20 '22 at 10:16

score 27 · Answer 2 · answered Oct 29 '12 at 06:09

27

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

-(bool)isOnPhoneCall {
    /*

     Returns TRUE/YES if the user is currently on a phone call

     */

    CTCallCenter *callCenter = [[[CTCallCenter alloc] init] autorelease];
    for (CTCall *call in callCenter.currentCalls)  {
        if (call.callState == CTCallStateConnected) {
            return YES;
        }
    }
    return NO;
}

answered Oct 29 '12 at 06:09

AlBeebe

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1

This does not appear to be functioning when building in Xcode 7 for iOS 9.x – Beltalowda Jun 08 '16 at 02:28

friend · Answer 3 · 2012-10-29T23:29:52.243

6

Thanks for the answer ThomasW. I thought I would also post the code.

- (void)applicationWillEnterForeground:(UIApplication *)application
{
    CTCallCenter *ctCallCenter = [[CTCallCenter alloc] init];
    if (ctCallCenter.currentCalls != nil) 
    {
        NSArray* currentCalls = [ctCallCenter.currentCalls allObjects];
        for (CTCall *call in currentCalls)
        {   
            if(call.callState == CTCallStateConnected)
            {
                // connected
            }
        }
    }
}

edited Oct 29 '12 at 23:29

answered Jun 08 '12 at 06:38

friend

1,909
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3

You could shorten this code a lot by using fast enumeration: `for (CTCall *call in ctCallCenter.currentCalls) {...}`. You don't need to check for `nil` or convert the set to an array. – omz Jun 08 '12 at 06:49
could you suggest your code then omz? i would be more than happy to upvote your answer if it will simply bong's post and be a lot more efficient and effective.. cheers omz. – Pavan Aug 08 '12 at 21:01
exactly what i needed! upvoted! @AlBeebe: currentCalls is used in the next line. – rockstarberlin Mar 29 '13 at 02:59

score 2 · Answer 4 · answered Nov 12 '19 at 07:49

2

I was having the same problem, but I think that the correct way to do this from iOS 10 is:

func checkForActiveCall() -> Bool {
    for call in CXCallObserver().calls {
        if call.hasEnded == false {
            return true
        }
    }
    return false
}

answered Nov 12 '19 at 07:49

JPetric

3,838
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why i always get hasEnded = false when close app? – famfamfam Apr 05 '21 at 17:33
even closed last call, double click home and see no call system here – famfamfam Apr 05 '21 at 17:33
Works with iOS 14 and 13. This is the right answer since CTCallCenter is currently a deprecated API – Yonathan Goriachnick May 27 '21 at 07:39

iOS How to check if currently on phone call

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