This newsletter issue covers several iOS interview and coding topics. It explains how to answer an undo/redo system question with Core Data (basic undo manager, grouped operations, child contexts for multi-screen flows). It covers designing an Instagram style feed with clarifying questions (content types, ranking algorithm, interactions, offline support, page size, heterogeneous items). It includes a Swift Bite about task cancellation not stopping automatically (need to check Task.isCancelled or try Task.checkCancellation). It also has a hot take that SwiftUI is ready for production but teams may not be ready because they bring UIKit habits.
This newsletter issue covers iOS interview and coding topics. It includes how to answer the Single Responsibility Principle question strongly, designing an image caching system with memory, disk, and network layers, a SwiftUI tip about using @StateObject instead of @State for reference types, and a hot take on AI tools widening the gap between engineers who understand principles versus those who memorize patterns.
