🔄 ArchitectureVam （架构Vam）

struct ContentView: VamView {
    
    typealias Action = ContentViewAction
    typealias Model = ContentViewModel
    
    let action: ContentViewAction
    @StateObject var model: ContentViewModel
    
    var body: some View {
        VStack {
            Text("\(model.count)")
            Button("Tap to increase count") {
                action.increaseCount()
            }
        }
    }
    
    static func build() -> ContentView {
        let model = ContentViewModel()
        let action = ContentViewAction(model: model)
        return .init(action: action, model: model)
    }
}

class ContentViewAction: Action<ContentViewModel> {
    
    func increaseCount() {
        model?.count += 1
    }
}

class ContentViewModel: Model {
    
    @Published var count = 0
}