CacheStore

SwiftUI Observable Cache

What is `CacheStore`?

CacheStore is a SwiftUI framework to help with state. Define keyed values that you can share locally or globally in your projects. CacheStore uses c, which a simple composition framework. c has the ability to create transformations that are either unidirectional or bidirectional. There is also a cache that values can be set and resolved, which is used in CacheStore.

Basic Example

Here is a simple application that has two files, an App file and ContentView file. The App contains the StateObject CacheStore. It then adds the CacheStore to the global cache using c. ContentView can then resolve the cache as an ObservableObject which can read or write to the cache. The cache can be injected into the ContentView directly, see ContentView_Previews, or indirectly, see ContentView.

DemoApp

import c
import CacheStore
import SwiftUI

enum CacheKey: Hashable {
    case someValue
}

@main
struct DemoApp: App {
    @StateObject var cacheStore = CacheStore<CacheKey>(
        initialValues: [.someValue: "?"]
    )
    
    var body: some Scene {
        c.set(value: cacheStore, forKey: "CacheStore")
        
        return WindowGroup {
            VStack {
                Text("@StateObject value: \(cacheStore.resolve(.someValue) as String)")
                ContentView()
            }
        }
    }
}

ContentView

import c
import CacheStore
import SwiftUI

struct ContentView: View {
    @ObservedObject var cacheStore: CacheStore<CacheKey> = c.resolve("CacheStore")
    
    var stringValue: String {
        cacheStore.resolve(.someValue)
    }
    
    var body: some View {
        VStack {
            Text("Current Value: \(stringValue)")
            Button("Update Value") {
                cacheStore.set(value: ":D", forKey: .someValue)
            }
        }
        .padding()
    }
}

struct ContentView_Previews: PreviewProvider {
    static var previews: some View {
        ContentView(
            cacheStore: CacheStore(
                initialValues: [.someValue: "Preview Cache Value"]
            )
        )
    }
}

GitHub

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