How to persist user input data in Landmartk app tutorial? Useless if input lost when app closed. Please help

How to persist user input data in Landmartk app tutorial? Useless if input lost when app closed. Please help. Have built a similar app from this tutorial but want to persist the TOGGLED Favorite items. CORE DATA…?

Are you referring to the Apple Landmark App tutorial or the tutorial that Chris did using the LandMark starter project?

This one - https://www.youtube.com/watch?v=6PO0k8GlxWA&t=827s

From the Apple tutorials basically.

I’m pretty sure that Chris’s intention with this particular App was to showcase a series of SwiftUI methods as an introduction into SwiftUI.

Consider watching the Core Data tutorial series that Chris has on YouTube beginning with this one.

After watching the series you could apply the techniques covered to introduce Core Data to the Landmarks project.