Publishing a Stream to the Session

When the app connects to the Vonage Video session, we want it to publish an audio-video stream to the session, using the device's camera and microphone:

1. Add a publisher property to the ViewController class:

The OTPublisher class is defined in the iOS SDK. It uses the device's camera and microphone, to publish a stream Vonage Video session.

2. Modify the implementation of the sessionDidConnect(_:) method to include code to publish a stream to the session:

When the app connects to a session, it initializes an instance of the OTPublisher, defined in the iOS SDK. The [OTPublisher initWithDelegate:] method takes two parameters: the object that implements the OTPublisherDelegate protocol and a settingsobject.

The code then passes the OTPublisher object in as a parameter of the [OTSession publish:] method. This method publishes an audio-video stream to the Vonage Video session, using the camera and microphone of the iOS device. (Note that in the Xcode simulator, the iOS SDK uses a test video when publishing a stream.)

The OTPublisher object has a view property, which is a UIView object. This view displays the video captured from the device's camera. The code adds this view as a subview of the main ViewController's view.

3. Change the ViewController interface declaration to indicate that the class implements the OTPublisherDelegate protocol:

Next we will implement methods of the OTSessionDelegate protocol. Add the following code to the end of the ViewController class (before the class's @end statement):

If the client fails to publish to the Vonage Video session, an OTError object is passed into the [OTPublisherDelegate publisher:didFailWithError:] method.

Debug your application. If the app successfully connects to the Vonage Video session, it will publish a stream to the session, and you will see the publisher's video in the app.