void AddObservers()
{
runningObserver = session.AddObserver("running", NSKeyValueObservingOptions.New, OnSessionRunningChanged);
subjectSubscriber = NSNotificationCenter.DefaultCenter.AddObserver(AVCaptureDevice.SubjectAreaDidChangeNotification, SubjectAreaDidChange, videoDeviceInput.Device);
runtimeErrorObserver = NSNotificationCenter.DefaultCenter.AddObserver(AVCaptureSession.RuntimeErrorNotification, SessionRuntimeError, session);
// A session can only run when the app is full screen. It will be interrupted in a multi-app layout, introduced in iOS 9.
// Add observers to handle these session interruptions
// and show a preview is paused message. See the documentation of AVCaptureSession.WasInterruptedNotification for other
// interruption reasons.
interuptionObserver = NSNotificationCenter.DefaultCenter.AddObserver(AVCaptureSession.WasInterruptedNotification, SessionWasInterrupted, session);
interuptionEndedObserver = NSNotificationCenter.DefaultCenter.AddObserver(AVCaptureSession.InterruptionEndedNotification, SessionInterruptionEnded, session);
}
public void AddObservers(AVCaptureSession session)
{
if (_addedObservers)
{
return;
}
session.AddObserver(this, RunningObserverKeyPath, NSKeyValueObservingOptions.New, _sessionRunningObserveContext);
_wasInterruptedNotification = NSNotificationCenter.DefaultCenter.AddObserver(
AVCaptureSession.WasInterruptedNotification,
SessionWasInterrupted, session);
_interruptionEndedNotification = NSNotificationCenter.DefaultCenter.AddObserver(
AVCaptureSession.InterruptionEndedNotification,
SessionInterruptionEnded, session);
_addedObservers = true;
}
void AddObservers()
{
runningChangeToken = session.AddObserver("running", NSKeyValueObservingOptions.New, RunningChanged);
// Observe the previewView's regionOfInterest to update the AVCaptureMetadataOutput's
// RectOfInterest when the user finishes resizing the region of interest.
PreviewView.RegionOfInterestDidChange += RegionOfInterestChanged;
var center = NSNotificationCenter.DefaultCenter;
runtimeErrorNotificationToken = center.AddObserver(AVCaptureSession.RuntimeErrorNotification, OnRuntimeErrorNotification, session);
// A session can only run when the app is full screen. It will be interrupted
// in a multi-app layout, introduced in iOS 9, see also the documentation of
// AVCaptureSessionInterruptionReason.Add observers to handle these session
// interruptions and show a preview is paused message.See the documentation
// of AVCaptureSessionWasInterruptedNotification for other interruption reasons.
wasInterruptedNotificationToken = center.AddObserver(AVCaptureSession.WasInterruptedNotification, OnSessionWasInterrupted, session);
interruptionEndedNotificationToken = center.AddObserver(AVCaptureSession.InterruptionEndedNotification, OnSessionInterruptionEnded, session);
}
private void AddObservers()
{
_runningObserver = _session.AddObserver("running", NSKeyValueObservingOptions.New, OnSessionRunningChangedHandler);
if (_stillImageOutput != null)
{
_capturingStillObserver = _stillImageOutput.AddObserver("capturingStillImage", NSKeyValueObservingOptions.New, OnCapturingStillImageChangedHandler);
}
_recordingObserver = _movieFileOutput.AddObserver("recording", NSKeyValueObservingOptions.New, OnRecordingChangedHandler);
_subjectSubscriber = NSNotificationCenter.DefaultCenter.AddObserver(AVCaptureDevice.SubjectAreaDidChangeNotification, OnSubjectAreaChangedHandler, _videoDeviceInput.Device);
_runtimeErrorObserver = NSNotificationCenter.DefaultCenter.AddObserver(AVCaptureSession.RuntimeErrorNotification, OnSessionRuntimeErrorOccuredHandler, _session);
// A session can only run when the app is full screen. It will be interrupted in a multi-app layout, introduced in iOS 9.
// Add observers to handle these session interruptions
// and show a preview is paused message. See the documentation of AVCaptureSession.WasInterruptedNotification for other
// interruption reasons.
_interuptionObserver = NSNotificationCenter.DefaultCenter.AddObserver(AVCaptureSession.WasInterruptedNotification, OnSessionWasInterruptedHandler, _session);
_interuptionEndedObserver = NSNotificationCenter.DefaultCenter.AddObserver(AVCaptureSession.InterruptionEndedNotification, OnSessionInterruptionEndedHandler, _session);
}