Singleton & Delegate Pattern in Swift

Managing shared data efficiently in iOS with Swift

GitHub

Open source Swift tutorial and working implementation of the Singleton and Delegate design patterns for managing shared data across an iOS app.

A practical guide and working implementation of two of the most used design patterns in iOS development — Singleton and Delegate — using Swift and UIKit.

What’s Covered

• Singleton pattern with private initializer for shared state
• DataUpdateDelegate protocol definition
• DataManager class with weak delegate reference to prevent retain cycles
• HomeViewController adopting the delegate pattern
• Comparison with Combine and NotificationCenter alternatives

Stack

• Language: Swift
• Framework: UIKit
• Patterns: Singleton, Delegate Protocol