Protocols and extensions summary
You’ve made it to the end of the ninth part of this series, so let’s summarize:
- Protocols describe what methods and properties a conforming type must have, but don’t provide the implementations of those methods.
- You can build protocols on top of other protocols, similar to classes.
- Extensions let you add methods and computed properties to specific types such as
Int. - Protocol extensions let you add methods and computed properties to protocols.
- Protocol-oriented programming is the practice of designing your app architecture as a series of protocols, then using protocol extensions to provide default method implementations.
SPONSORED Catch bugs as soon as they happen and know exactly why a crash occurred by integrating Instabug's SDK in one minute. You will automatically receive device data, network logs, and reproduction steps with every bug and crash report.
Sponsor Hacking with Swift and reach the world's largest Swift community!
