How to detect whether mic available in device(iPhone/iPad)- Objective C

Question

In my iOS application, I want to show an Alert, if Mic is not available in the device.

How can I check this ?

I have tried this-

 -(void)checkMic
 {
  UInt32 sessionCategory = kAudioSessionCategory_RecordAudio;
   OSStatus status = AudioSessionSetProperty (kAudioSessionProperty_AudioCategory, sizeof (sessionCategory), &sessionCategory);  //..always seems to return OK..
   status = AudioSessionSetActive (true);
   if(status)
   {
      //mic is not available
    }
  }

But this code is showing an error with message - deprecated.

Try this http://stackoverflow.com/questions/2282871/how-can-i-check-if-a-microphone-is-plugged-into-the-iphone — Rahul Mathur, Mar 07 '14 at 11:42

Jeff Loughlin · Accepted Answer · 2014-07-16T18:25:11.080

13

AudioSessionSetProperty and AudioSessionGetProperty are deprecated as of iOS 7. Use AVAudioSession instead.

You can use its availableInputs property to get a list of what's available and iterate through them to find one that looks like a microphone, like this:

NSArray *availableInputs = [[AVAudioSession sharedInstance] availableInputs];
BOOL micPresent = false;
for (AVAudioSessionPortDescription *port in availableInputs)
{
    if ([port.portType isEqualToString:AVAudioSessionPortBuiltInMic] ||
        [port.portType isEqualToString:AVAudioSessionPortHeadsetMic])
    {
        micPresent = true;
    }
}

if (micPresent)
{
    // Do something cool
}
else
{
    // No mic present - show alert
}

Alternatively, if you just want any input at all, and don't care if it's a mic or a line-in, you can just do:

if ([[AVAudioSession sharedInstance] inputAvailable];
{
    // Do something cool
}
else
{
    // No input present - show alert
}

edited Jul 16 '14 at 18:25

answered Mar 07 '14 at 12:59

Jeff Loughlin

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FYI - `inputIsAvailable` was deprecated in iOS 6.0. Use `inputAvailable` instead. – rmaddy Jul 16 '14 at 05:43
@rmaddy: You are correct. I've edited the answer to keep it up to date. Thanks. – Jeff Loughlin Jul 16 '14 at 18:26
how to detect if the microphone is owned by a call (if the phone is during a call) – Qusai Azzam Sep 02 '19 at 11:41
@Qusai Azzam - did you get any solution? – sachin gupta Feb 22 '20 at 20:23
well, I did, where do you want me to explain it? @sachingupta – Qusai Azzam Feb 23 '20 at 00:17
please email at sachin.gupta@bridgera.com – sachin gupta Feb 23 '20 at 19:07
@QusaiAzzam availableInputs gets inputs but doesn't check if they are in use. I found `inputDataSources` to do what I needed, which is check if it's in use (it will be empty array if in use by background call for instance) – Rafael Nobre Aug 13 '20 at 20:03
well, I found another way to handle that. – Qusai Azzam Aug 29 '20 at 15:09

How to detect whether mic available in device(iPhone/iPad)- Objective C

1 Answers1