iOS How to check if currently on phone call

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.

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
}

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
            }
        }
    }
}

#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;
}