Trevor Whittingham • 12/12/2023

AsyncImage Is Not Enough: Build A Cached Image Loader In SwiftUI

This article explains why SwiftUI's AsyncImage is insufficient for production apps that need control over image caching, retry behavior, cancellation, downsampling, and memory policies. It provides a step-by-step guide to building a custom memory cache using NSCache, including a detailed implementation of ImageCacheKey and ImageCache classes with cost limits and thread safety. The tutorial is aimed at iOS developers using SwiftUI who need a lightweight, dependency-free solution for efficient remote image loading and caching.

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#Io #Swiftui #Image Caching