SwiftUI CachedAsyncImage

To add this library to your Xcode project:

1. In Xcode, navigate to File → Swift Packages → Add Package Dependency...
2. Paste the repository URL: https://github.com/lorenzofiamingo/swiftui-cached-async-image
3. Click Next and then Finish.

The CachedAsyncImage component provides the same API and behavior as SwiftUI's native AsyncImage, but adds caching capabilities. For basic usage, simply replace AsyncImage with CachedAsyncImage.

// From this:
AsyncImage(url: logoURL)

// To this:
CachedAsyncImage(url: logoURL)

You can extend URLCache to define a dedicated cache for images. When configuring a custom cache, ensure the response (the image) is no larger than approximately 5% of the disk cache capacity to comply with system recommendations.

Example of defining a large dedicated cache:

extension URLCache {
    static let imageCache = URLCache(memoryCapacity: 512_000_000, diskCapacity: 10_000_000_000)
}

// URLCache+imageCache.swift

extension URLCache {
    
    static let imageCache = URLCache(memoryCapacity: 512_000_000, diskCapacity: 10_000_000_000)
}

Beyond the standard url initializer, CachedAsyncImage allows you to provide a custom URLRequest and specify a specific URLCache to use for image storage. By default, it uses URLCache.shared.

CachedAsyncImage(urlRequest: logoURLRequest, urlCache: .imageCache)