# FoveatedStreamingSession.MessageChannel A bidirectional channel for sending and receiving custom data. ``` class MessageChannel ``` ## Overview Use message channels to communicate with the application streaming foveated content to your visionOS app. You can send data with the [`sendMessage(_:)`](/documentation/FoveatedStreaming/FoveatedStreamingSession/MessageChannel/sendMessage(_:)) function and receive data through the [`receivedMessageStream`](/documentation/FoveatedStreaming/FoveatedStreamingSession/MessageChannel/receivedMessageStream) async stream. ## Topics ### Structures [`struct ID`](/documentation/FoveatedStreaming/FoveatedStreamingSession/MessageChannel/ID-swift.struct) A unique identifier for a message channel. ### Instance Properties [`var channelStatus: FoveatedStreamingSession.MessageChannel.ChannelStatus`](/documentation/FoveatedStreaming/FoveatedStreamingSession/MessageChannel/channelStatus-swift.property) The state of the message channel. [`let id: FoveatedStreamingSession.MessageChannel.ID`](/documentation/FoveatedStreaming/FoveatedStreamingSession/MessageChannel/id-swift.property) An identifier for the message channel. [`let receivedMessageStream: AsyncStream`](/documentation/FoveatedStreaming/FoveatedStreamingSession/MessageChannel/receivedMessageStream) An async stream that yields data objects each time the channel receives a message. ### Instance Methods [`func disconnect()`](/documentation/FoveatedStreaming/FoveatedStreamingSession/MessageChannel/disconnect()) Manually disconnects and closes the data channel. [`func sendMessage(Data) throws`](/documentation/FoveatedStreaming/FoveatedStreamingSession/MessageChannel/sendMessage(_:)) Sends data to the streaming endpoint on this channel. ### Enumerations [`enum ChannelStatus`](/documentation/FoveatedStreaming/FoveatedStreamingSession/MessageChannel/ChannelStatus-swift.enum) The status of a message channel. ## Relationships ### Conforms To [`Identifiable`](/documentation/Swift/Identifiable) [`Observable`](/documentation/Observation/Observable) [`Escapable`](/documentation/Swift/Escapable) [`Copyable`](/documentation/Swift/Copyable) --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)