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

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# RtkNavigationBar

Last updated Aug 24, 2026|Copy as Markdown|[View as Markdown](https://docs-durable-objects-instance-replaced-errors.previews.developers.cloudflare.com/realtime/realtimekit/ui-kit/api-reference/ios/rtk-navigation-bar/index.md)|[Agent setup](https://docs-durable-objects-instance-replaced-errors.previews.developers.cloudflare.com/agent-setup/)

A navigation bar with a title label and a close or back button. Used for modal screens such as chat, polls, and participant lists.

## Initializer parameters

| Parameter | Type   | Required | Default | Description                                    |
| --------- | ------ | -------- | ------- | ---------------------------------------------- |
| title     | String | ✅        | \-      | The title text displayed in the navigation bar |

## Properties

| Property   | Type                | Required | Default | Description                                               |
| ---------- | ------------------- | -------- | ------- | --------------------------------------------------------- |
| titleLabel | RtkLabel            | \-       | \-      | The label displaying the navigation bar title (read-only) |
| leftButton | RtkControlBarButton | \-       | \-      | The close or back button on the left side (read-only)     |

## Methods

| Method                        | Return Type | Description                                       |
| ----------------------------- | ----------- | ------------------------------------------------- |
| setBackButtonClick(callBack:) | Void        | Sets the tap handler for the back or close button |

## Usage Examples

### Basic Usage

```swift
import RealtimeKitUI

let navBar = RtkNavigationBar(title: "Participants")
view.addSubview(navBar)
```

### With back button handler

```swift
import RealtimeKitUI

let navBar = RtkNavigationBar(title: "Chat")
navBar.setBackButtonClick {
    self.dismiss(animated: true)
}
view.addSubview(navBar)
```

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