Cross-platform Live Activity SDK setup

Live Activities are a relatively new iOS feature and require native implementation, which can pose challenges when using cross-platform frameworks like React Native, Flutter, Unity, Cordova, etc. To simplify the process, OneSignal’s SDK includes functionality that minimizes native code requirements, enabling streamlined Live Activity integration across supported platforms.

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Requirements

• The latest version of our SDK.
• iOS 16.1+ and iPadOS 17+
• Use a .p8 APNs key. Apple doesn’t support p12 certificates with Live Activities.
• Xcode 14 or higher

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Setup

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1. Setup our SDK

Ensure that you’ve set up the most recent version of our Mobile SDK on your app. Live Activities are not available for websites or with our Web SDK.

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2. Add the new setupDefault method

In order to tell the OneSignal SDK to manage the LiveActivity lifecycle for the DefaultLiveActivityAttributes type, you can call the setupDefault method. This method allows you to use both the Start Live Activity and Update Live Activity APIs to start/update/end the Default Live Activity.

import { OneSignal } from 'react-native-onesignal'

//Push To Start
OneSignal.LiveActivities.setupDefault()

//Launching the Live Activity from within the app (not needed for push to start)
const activityId = "my_activity_id"
const attributes = { title: "Sample Title" } ;
const content = { message: { en: "message" } };
OneSignal.LiveActivities.startDefault(activityId, attributes, content);

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3. Create Activity Widget

target 'OneSignalWidgetExtension' do
  #use_frameworks!
  pod 'OneSignalXCFramework', '>= 5.0.0', '< 6.0'
end

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4. Setup the LiveActivity.swift file

In Xcode, open the WidgetExtensionLiveActivity.swift file.

Open the Inspector panel on the right side of the screen. Within Target Membership, click the + button and select your Runner target.

Update the contents of WidgetExtensionLiveActivity.swift with the following default Live Activity layout. The values in this Widget can be changed to whatever you’d like displayed on the widget, the setupDefault method will handle defining the struct for these attributes.

import ActivityKit
import WidgetKit
import SwiftUI
import OneSignalLiveActivities

// Your struct name might be different here
@available(iOS 16.2, *)
struct OneSignalWidgetLiveActivity: Widget {
    var body: some WidgetConfiguration {
        ActivityConfiguration(for: DefaultLiveActivityAttributes.self) { context in
            // Lock screen / banner UI
            VStack {
                Spacer()
                
                Text("Title: " + (context.attributes.data["title"]?.asString() ?? ""))
                    .font(.headline)
                
                Spacer()
                
                HStack {
                    Spacer()
                    Text(context.state.data["message"]?.asDict()?["en"]?.asString() ?? "Default Message")
                    Spacer()
                }
                
                Text("INT: " + String(context.state.data["intValue"]?.asInt() ?? 0))
                Text("DBL: " + String(context.state.data["doubleValue"]?.asDouble() ?? 0.0))
                Text("BOL: " + String(context.state.data["boolValue"]?.asBool() ?? false))
                
                Spacer()
            }
            .activitySystemActionForegroundColor(.black)
            .activityBackgroundTint(.white)

        } dynamicIsland: { _ in
            DynamicIsland {
                // Expanded UI
                DynamicIslandExpandedRegion(.leading) {
                    Text("Leading")
                }
                DynamicIslandExpandedRegion(.trailing) {
                    Text("Trailing")
                }
                DynamicIslandExpandedRegion(.bottom) {
                    Text("Bottom")
                    // More content
                }
            } compactLeading: {
                Text("L")
            } compactTrailing: {
                Text("T")
            } minimal: {
                Text("Min")
            }
            .widgetURL(URL(string: "http://www.apple.com"))
            .keylineTint(Color.red)
        }
    }
}

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Test the Live Activity

1. Start the app

2. See all possible fields in our Start Live Activity API reference. The structure of these fields might differ depending on how you’ve set up your UI. For example :

• "event_updates": This is the dynamic data that can be updated after the Live Activity has been started (anything after context.state in the code example). Since we have context.state.data we would add a data object to this field and any additional fields within like the message dictionary we have added in the code example. For usage, see example request below.
• "event_attributes": This is the static data that is set in the push to start request, and remains the same value until the Live Activity is removed or overwritten.

3. When using push to start, you set the "activity_id" in the request, rather than in the code. Using different Activity ID’s will start new Live Activities. Using the same Activity ID will overwrite the widget that is currently using that ID.

4. Ensure that you’ve changed the OneSignal App ID in your url path, and the Rest API Key in the Authorization header. The DefaultActivityAttributes type cannot be changed if you are using the default setup. Please also note, the activity type added to your path is case sensitive and should match what is defined either by you or the Default activity used in the example below.

curl --request POST \
     --url https://api.onesignal.com/apps/YOUR_APP_ID/activities/activity/DefaultLiveActivityAttributes \
     --header 'Authorization: key YOUR_REST_API_KEY' \
     --header 'Content-Type: application/json' \
     --header 'accept: application/json' \
     --data '
{
  "event": "start",
  "event_updates": {
    "data": {
      "message": {
        "en": "The message is nested in context.state.data[\"message\"] as a dictionary"
      },
      "intValue": 10,
      "doubleValue": 3.14,
      "boolValue": true
    }
  },
  "event_attributes": {
    "title": "this is set when the LA starts and does not get updated after"
  },
  "activity_id": "my-activity-id",
  "name": "OneSignal Notification Name",
  "contents": {
    "en": "English Message"
  },
  "headings": {
    "en": "English Message"
  },
  "sound": "beep.wav",
  "priority": 10
}'

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Low-level methods

These are optional methods to use if you want to generate your own Push To Start token, which has also been added in the latest release of the SDK. Using these methods requires that you interact with Xcode more, and generate your own token for Push To Start with Swift. You can find a guide on this here.

//Setting the Push To Start Token
OneSignal.LiveActivities.setPushToStartToken(activityType: string, token: string)

//Removing the Push To Start Token
OneSignal.LiveActivities.removePushToStartToken(activityType: string)