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There should be an overload for SetSampleBufferDelegatequeue (sic) that takes an IAVAudioRecorderDelegate instead of an AVAudioRecorderDelegate so you can use the weak delegate mechanism instead of making a private class for just one method. Also, there's a capitalization typo in the name of the method.
The interface option should likewise be supported by other similar classes (ex: AVCaptureVideoDataOutput).
Correction: IAVCaptureAudioDataOutputSampleBufferDelegate/AVCaptureAudioDataOutputSampleBufferDelegate (not IAVAudioRecorderDelegate/AVAudioRecorderDelegate).
I've added another overload that takes the I* version (and with the correct case for the method name).
I have checked this issue on following builds:
Xamarin Studio : 4.2.4 (build 32)
Xamarin.iOS : 220.127.116.11 (Trial Edition)
Release ID: 402040032
Git revision: a160c35dac9ab9fd32eeadaa171216316d5a5133
Build date: 2014-03-12 13:55:08-04
Xamarin addins: a779416ceabd54981ce812771a4061c942e8b872
I observer that now we have two overload for "SetSampleBufferDelegatequeue", one takes an "AVCaptureAudioDataOutputSampleBufferDelegate" and second one "IAVCaptureAudioDataOutputSampleBufferDelegate" as an argument. I have also checked that the second overload i.e. "SetSampleBufferDelegatequeue" which takes "IAVCaptureAudioDataOutputSampleBufferDelegate" as an argument has correct case for the method name but the first one does not have correct case for that method name . The signature of both method is as following:
1.public virtual void SetSampleBufferDelegatequeue (AVCaptureAudioDataOutputSampleBufferDelegate sampleBufferDelegate, DispatchQueue sampleBufferCallbackDispatchQueue)
2.public void SetSampleBufferDelegateQueue (IAVCaptureAudioDataOutputSampleBufferDelegate sampleBufferDelegate, DispatchQueue sampleBufferCallbackDispatchQueue)
This issue is working fine. Hence, I am closing this issue.