How do I include a macOS (AppKit) app extension in a Mac Catalyst app?

To include a macOS (AppKit) app extension in a Mac Catalyst app, you can follow these general steps:

1. Create a New Target for the Extension:

   • Navigate to the file menu in Xcode and select "New Target".
   • Choose the platform for the extension, in this case, macOS.
   • Search for the appropriate extension template, such as a Core Spotlight delegate extension.
   • Configure the new target and add it to your project.

2. Activate and Implement the Extension:

   • Activate the new extension and implement the necessary functionality.
   • For example, if you are creating a Core Spotlight delegate extension, you would implement the delegate methods to handle indexing requests.

3. Build and Debug the Extension:

   • Select the app's target and build the app to include the new extension.
   • Switch to the extension target and attach to the process for debugging.
   • Use tools like mdutil to simulate requests and test the extension.

For a detailed demonstration on creating an index delegate extension, you can refer to the Support semantic search with Core Spotlight session.

Relevant Sessions

• Support semantic search with Core Spotlight
• What’s new in AppKit

If you need more specific guidance or have additional questions, feel free to ask!