---
title: RtkJoinButton
description: API reference for RtkJoinButton component (iOS Library)
image: https://developers.cloudflare.com/dev-products-preview.png
---

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# RtkJoinButton

A pre-configured button that joins the meeting. Validates the participant name before joining.

## Initializer parameters

| Parameter  | Type                             | Required | Default | Description                                                                                             |
| ---------- | -------------------------------- | -------- | ------- | ------------------------------------------------------------------------------------------------------- |
| meeting    | RealtimeKitClient                | ✅        | \-      | The RealtimeKit client instance                                                                         |
| onClick    | ((RtkJoinButton, Bool) -> Void)? | ❌        | nil     | Closure called when the button is tapped. The Bool parameter indicates whether the join was successful. |
| appearance | RtkButtonAppearance              | ❌        | \-      | Appearance configuration for the button                                                                 |

## Usage Examples

### Basic Usage

Swift

```
import RealtimeKitUI
let joinButton = RtkJoinButton(meeting: rtkClient)view.addSubview(joinButton)
```

### With tap handler

Swift

```
import RealtimeKitUI
let joinButton = RtkJoinButton(    meeting: rtkClient,    onClick: { button, success in        if success {            print("Joined meeting")        } else {            print("Join failed")        }    })view.addSubview(joinButton)
```

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