Legacy iOS 12-25 NWConnection Patterns

These patterns use NWConnection with completion handlers for apps supporting iOS 12-25. If your app targets iOS 26+, use NetworkConnection with async/await instead (see axiom-network-framework-ref skill).

Pattern 2a: NWConnection with TLS (iOS 12-25)

Use when Supporting iOS 12-25, need TLS encryption, can't use async/await yet

Time cost 10-15 minutes

GOOD: NWConnection with Completion Handlers

import Network