# startSend(_:metadata:handler:) Send partial text on a connection. ``` func startSend(_ content: String, @ProtocolMetadataBuilder metadata builder: () -> [NWProtocolMetadata] = {[]}, handler: ((String, Bool) async throws -> Void) async throws -> Void) async throws ``` ## Parameters `content` A string to send. `builder` A builder for specifying metadata about the content to send. `handler` A handler that will be invoked immediately, and will be passed a closure that should be called repeatedly until all text content is sent. Intermediate invocations of the send closure must be invoked with `isComplete` set to false. The last call to the send closure must be invoked with `isComplete` set to true. ## Discussion This may be called before the connection is ready, in which case the send will be enqueued until the connection is ready to send. --- 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)