I'm looking for the Swift tutorial that had always been used since I started learning Swift for the first time about 5 years ago. I can't remember the name. It was an app that reviewed restaurants, as I remember. I need a sample of key-value-coding. I recall that tutorial used key-value-coding.
key value coding sample
I didn't find the tutorial you search for, but this may help. https://developer.apple.com/documentation/swift/using-key-value-observing-in-swift