What are our options for storage and persistence?

Sources & Resources

Main Source: 🔗 Ace the iOS Interview

Additional Sources:

Further Reading:

TL/DR

Some of the options include:

User Defaults

We can useUserDefaultsto store simple key-value pairs in an insecure manner. Typically, you would only use UserDefaults to store something lightweightlike a user setting.

.plist

We can use a .plist to store larger data sets. It’s a really flexible human-readable format.

Keychain

This is the only encrypted persistent storage option available on iOS and is used for storing highly sensitive key-value pairs (primarily credentials).

Disk Storage

We can serialize data, domain models, or other downloaded content and save them directly to disk.

Core Data / SQLite

Useful in cases where we have larger data sets and are interested in making queries on the data.