---
title: "setDelegate(_:)"
framework: IOBluetooth
role: symbol
role_heading: Instance Method
path: "iobluetooth/iobluetoothl2capchannel/setdelegate(_:)"
---

# setDelegate(_:)

Allows an object to register itself as client of the L2CAP channel.

## Declaration

```swift
func setDelegate(_ channelDelegate: Any!) -> IOReturn
```

## Parameters

- `channelDelegate`: The object that will play the role of channel delegate [NOTE the l2cap channel will retain the delegate].

## Return Value

Return Value Returns kIOReturnSuccess if the delegate is successfully registered.

## Discussion

Discussion A channel delegate is the object the L2CAP channel uses as target for data and events. The developer will implement only the the methods he/she is interested in. A list of the possible methods is at the end of this file in the definition of the informal protocol IOBluetoothL2CAPChannelDelegate. A newly opened L2CAP channel will not complete its configuration process until the client that opened it registers a connectionHandler. This prevents that case where incoming data is received before the client is ready. NOTE: This method is only available in macOS 10.2.5 (Bluetooth v1.2) or later.