How can I implement a live activity widget

To implement a live activity widget for Apple Watch, you can follow these steps based on the information provided in the WWDC sessions:

1. Automatic Appearance on Apple Watch:

   • If you already have an iOS live activity, it will automatically appear in the smart stack on Apple Watch when users update to watchOS 11. This requires no additional work on your part (Bring your Live Activity to Apple Watch).

2. Customizing the Live Activity View:

   • You can provide a custom view for your live activity on Apple Watch by specifying that your live activity supports the small supplemental activity family. This is done by adding the supplementalActivityFamilies modifier to your activity configuration (What’s new in watchOS 11).
   • Use the Xcode preview to see how your live activity will appear on Apple Watch. You can customize the layout further using the environment settings (Bring your Live Activity to Apple Watch).

3. Handling Updates and Connectivity:

   • Ensure your live activity is showing the most up-to-date information by managing update frequency and budgeting. Updates are synchronized automatically between iPhone and Apple Watch, and you don't need to manage separate push tokens (Bring your Live Activity to Apple Watch).

4. Interactions and Notifications:

   • Live activities on Apple Watch can be interacted with in various ways. For example, tapping on the live activity widget can take the user into the app or expand the widget into a full-screen view (Design Live Activities for Apple Watch).
   • When a live activity receives an update, a compact view appears at the bottom of the display, which can be pulled up to enlarge into the full widget (Design Live Activities for Apple Watch).

5. Additional Customization:

   • If you have a watchOS app, you can opt to open it from a tap on the live activity in the smart stack. This can be configured in the build settings for your watch app target by adding a value for the supportsLaunchForLiveActivity attribute type key in the info plist section (Bring your Live Activity to Apple Watch).

For a detailed walkthrough, you can refer to the session Bring your Live Activity to Apple Watch.