void SessionWasInterrupted (NSNotification notification)
{
// In some scenarios we want to enable the user to restart the capture session.
// For example, if music playback is initiated via Control Center while using AVCamManual,
// then the user can let AVCamManual resume the session running, which will stop music playback.
// Note that stopping music playback in Control Center will not automatically resume the session.
// Also note that it is not always possible to resume, see ResumeInterruptedSession method.
// In iOS 9 and later, the notification's UserInfo dictionary contains information about why the session was interrupted
var reason = (AVCaptureSessionInterruptionReason)notification.UserInfo [AVCaptureSession.InterruptionReasonKey].AsInt ();
Console.WriteLine ($"Capture session was interrupted with reason {reason}");
if (reason == AVCaptureSessionInterruptionReason.AudioDeviceInUseByAnotherClient ||
reason == AVCaptureSessionInterruptionReason.VideoDeviceInUseByAnotherClient) {
// Simply fade-in a button to enable the user to try to resume the session running
ResumeButton.Hidden = false;
ResumeButton.Alpha = 0;
UIView.Animate (0.25, () => ResumeButton.Alpha = 1);
} else if (reason == AVCaptureSessionInterruptionReason.VideoDeviceNotAvailableWithMultipleForegroundApps) {
// Simply fade-in a label to inform the user that the camera is unavailable
CameraUnavailableLabel.Hidden = false;
CameraUnavailableLabel.Alpha = 0;
UIView.Animate (0.25, () => CameraUnavailableLabel.Alpha = 1);
}
}
