README.md

Lecture 11: Error Handling Persistence

Error handling

Persistence

• iCloud - data you want to appears on all the users devices
• CloudKit - famework for making this happens

Archiving

• For structs that contain only other codeables, Swift will implement the Codable for you.
• For enums Swift will implement Codable for you unless you have associated data

UserDefaults

• Things can only be stored in a Property List
• This is just an idea or concept.
• Any combination of these things but it has to be a combination of only these things
• The loop whole is that Data is one of these types so we can take a Codable and store it as Data if we which.

The UserDefaults API has a type in it called Any. And Any is anti Swift. It means untyped. And Swift being a typed language doen't like. So we just adjust.

array(forKey) returns an Any. But you need to figure out how to convert. So we convert into an array of something we know using as ?.

Can avoid a lot of this if you use Codable.

Links that help

• Lectures
• Lecture 11