---
title: "setActiveRemoteParticipant(_:channelUUID:completionHandler:)"
framework: pushtotalk
role: symbol
role_heading: Instance Method
path: "pushtotalk/ptchannelmanager/setactiveremoteparticipant(_:channeluuid:completionhandler:)"
---

# setActiveRemoteParticipant(_:channelUUID:completionHandler:)

Sets the active remote participant with the channel identifier.

## Declaration

```swift
func setActiveRemoteParticipant(_ participant: PTParticipant?, channelUUID: UUID, completionHandler: (@Sendable ((any Error)?) -> Void)? = nil)
```

```swift
func setActiveRemoteParticipant(_ participant: PTParticipant?, channelUUID: UUID) async throws
```

## Parameters

- `participant`: The remote participant to become active.
- `channelUUID`: The channel identifier the participant becomes active in.
- `completionHandler`: The completion handler that contains an optional error.

## Mentioned in

Creating a Push to Talk app

## Discussion

Discussion important: You can call this method from synchronous code using a completion handler, as shown on this page, or you can call it as an asynchronous method that has the following declaration: func setActiveRemoteParticipant(_ participant: PTParticipant?, channelUUID: UUID) async throws For information about concurrency and asynchronous code in Swift, see Calling Objective-C APIs Asynchronously. When you receive incoming audio from a remote participant, set the participant value, which updates the system user interface and blocks transmission by the local user. When the user stops speaking, set the active participant to nil.