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iOS Screen Share using Broadcast Extension

Screen Sharing in iOS

Screen sharing functionality allows users to broadcast their device screens in real-time, enabling various use cases like remote collaboration, live presentations, and interactive streaming. Through this document, you will leverage the power of the Ant Media Server’s iOS SDK and WebRTC to build an iOS application capable of seamless screen sharing with minimal effort.

To begin, it is first needed to create a project and include the necessary dependencies. These steps mirror those documented for publishing and playing.

Step 1: Creating an iOS app project in Xcode

Step 2: Adding the WebRTC-iOS-SDK dependency

Step 3: Implementing Screen Sharing

  • Add a new Target.

  • Choose Broadcast Upload Extension and click Next.

  • Name the product and click Next.

  • Activate your extension.

  • Click on the plus button under Framework & Libraries to add the WebRTC-IOS-SDK dependency recently imported.

  • Select the dependency: WebRTC-IOS-SDK.

  • Update the version of the XCode Project as needed

  • Open the SampleHandler.swift file under the BroadcastScreen Extension and add the code from the link below

Make sure to set your server URL and a streamId

  • Optional: You may choose to enable the split window view by clicking on Add editor to the right. The Add editor to the right option is the last button on the 2nd row, as shown in the screenshot below, which allows you to work in a split screen view

  • Navigate to the Main.storyboard on the left menu. Open the Library by selecting View > Show Library from the menu, and then enter UIView in the search box, as shown in the image below.

Drag the View from the Library and drop it onto the Main.storyboard. Afterwards, adjust the size of the UIView to match the image below.

Optional: Customize the color and theme as needed.

  • If you have a split your screen, you should now have the ViewController.swift file loaded on one screen and the main.storyboard loaded on the other screen.

  • Right-click on the UIView element in the Main.storyboard, then drag it over to the ViewController.swift file and release the right-click.

This will trigger a popup as shown, allowing you to name your Outlet.

  • You should already have the ViewController file open in your Xcode project, so now follow these steps to add the RPSystemBroadcastPickerView to the view.

Copy and paste the following code in the ViewController:

import UIKit
import WebRTCiOSSDK
import ReplayKit

class ViewController: UIViewController {

@IBOutlet weak var videoView: UIView!
var client: AntMediaClient = AntMediaClient.init()

override func viewDidLoad() {

let broadcastPicker = RPSystemBroadcastPickerView(frame: CGRect(x: 0, y: 0, width: 50, height: 50))
broadcastPicker.preferredExtension = "<YOUR_BUNDLE_IDENTIFIER>";

Once you’ve added the provided code, the RPSystemBroadcastPickerView will be successfully integrated into your ViewController’s view.

  • Let’s add Privacy descriptions to Info.plist. Right-click Info.plist and add Microphone Usage descriptions as below on info.plist

Step 4: Testing and Optimization

  • Choose Broadcast Screen in the Targets.

  • Run the BroadcastScreen. Choose the original application and click on Run

  • You are ready to start streaming your screen.

  • You should see a live stream on your Ant Media Server.

  • You can now stream your device screen with audio.

Congratulations! You have successfully implemented iOS screen sharing with the Ant Media iOS SDK and WebRTC using Broadcast extension.