No sound in first second of call with CallKit

Question

svalma OP

Created Feb ’20

Replies 2

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Participants 2

Hello!

I have searched through internet, but there are no discussions about exactly this problem.

Customers of application which I support complain about problem: when I take incoming call, there is no sound for about 1 - 1.5 sec in iPhone 5s (new iPhones take less time) and Loudspeaker button is active during this time.

I checked with WhatsApp - they have this problem too. It looks like some iOS bug / specific behavior.

Did anyone find a workaround to fix it? Or information from Apple that it is specific behavior?

I've tried to configure [AVAudioSession sharedInstance] in 'provider:performAnswerCallAction:' method, in 'provider:didActivateAudioSession:'

method, in completion block of 'reportNewIncomingCallWithUUID:update:completion:' or before it. No success.

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Answer 1

PBK OP

Feb ’20

This could certainly be in the CallKit API. But one other source is that something is launched off the main queue. Have you tried:

dispatch_async(dispatch_get_main_queue(), ^{ some code here });

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Answer 2

svalma OP

Feb ’20

Thanks for advice.

I checked - seems that all CallKit methods (at least methods calling on answer call) are calling in main thread by default and there are no dispatches to global queue in my code.

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