---
description: API reference for RtkControlBarButton component (iOS Library)
title: RtkControlBarButton
image: https://developers.cloudflare.com/og-docs.png
---

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# RtkControlBarButton

Last updated Aug 24, 2026|Copy as Markdown|[View as Markdown](https://e8aee267.previews.developers.cloudflare.com/realtime/realtimekit/ui-kit/api-reference/ios/rtk-control-bar-button/index.md)|[Agent setup](https://e8aee267.previews.developers.cloudflare.com/agent-setup/)

Base button class for control bar items. Supports normal and selected states, notification badges, and theming through appearance configuration.

## Initializer parameters

| Parameter  | Type                          | Required | Default | Description                                     |
| ---------- | ----------------------------- | -------- | ------- | ----------------------------------------------- |
| image      | RtkImage                      | ✅        | \-      | The icon image for the button                   |
| title      | String                        | ❌        | ""      | The title text displayed below the icon         |
| appearance | RtkControlBarButtonAppearance | ❌        | \-      | Appearance configuration for colors and styling |

## Properties

| Property               | Type                     | Required | Default | Description                                                 |
| ---------------------- | ------------------------ | -------- | ------- | ----------------------------------------------------------- |
| selectedStateTintColor | UIColor                  | ❌        | \-      | Tint color applied when the button is in the selected state |
| normalStateTintColor   | UIColor                  | ❌        | \-      | Tint color applied when the button is in the normal state   |
| notificationBadge      | RtkNotificationBadgeView | \-       | \-      | Badge view for displaying notification counts               |

## Methods

| Method                    | Return Type | Description                                                         |
| ------------------------- | ----------- | ------------------------------------------------------------------- |
| setSelected(image:title:) | Void        | Sets the button to the selected state with a custom image and title |
| setDefault(image:title:)  | Void        | Sets the button to the default state with a custom image and title  |

## Usage Examples

### Basic Usage

```swift
import RealtimeKitUI

let button = RtkControlBarButton(
    image: RtkImage(image: UIImage(systemName: "mic")),
    title: "Mute"
)
view.addSubview(button)
```

### With state changes

```swift
import RealtimeKitUI

let button = RtkControlBarButton(
    image: RtkImage(image: UIImage(systemName: "mic")),
    title: "Mute"
)

// Switch to selected state
button.setSelected(
    image: RtkImage(image: UIImage(systemName: "mic.slash")),
    title: "Unmute"
)

// Switch back to default state
button.setDefault(
    image: RtkImage(image: UIImage(systemName: "mic")),
    title: "Mute"
)
view.addSubview(button)
```

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