3 min readFeb 7, 2026
SwiftHow to Add Methods with Extensions
Extend existing types without subclassing.
Steps
- Paste the code into a Swift file or playground.
- Run it once to verify the output.
- Adjust the inputs to match your use case.
Copy and paste
import Foundation
extension String {
func reversedWords() -> String {
return self.split(separator: " ").reversed().joined(separator: " ")
}
}
let text = "Swift is fast"
print(text.reversedWords())Notes
- Keep functions small and focused for reuse.
- Prefer safe APIs like optionals and guards.
