SwiftUI-在視圖模型數(shù)組中更新的模型上刷新視圖

簡(jiǎn)單的問(wèn)題，但我可能忘記了一些代碼。讓我們用圖像更好地解釋一下：

我需要基本上更新“計(jì)數(shù)”和“價(jià)格”，而選擇/取消選擇項(xiàng)目。

我有這樣的代碼結(jié)構(gòu)：

Model:

class ServiceSelectorModel: Identifiable, ObservableObject {
    var id = UUID()

    var serviceName: String
    var price: Double
    
    init(serviceName: String, price: Double) {
        self.serviceName = serviceName
        self.price = price
    }

    @Published var selected: Bool = false
}

ViewModel:

class ServiceSelectorViewModel: ObservableObject {
    @Published var services = [ServiceSelectorModel]()

    init() {
        self.services = [
            ServiceSelectorModel(serviceName: "SERVICE 1", price: 1.80),
            ServiceSelectorModel(serviceName: "SERVICE 2", price: 10.22),
            ServiceSelectorModel(serviceName: "SERVICE 3", price: 2.55)
        ]
    }
}

ToggleView

struct ServiceToggleView: View {
    @ObservedObject var model: ServiceSelectorModel
    
    var body: some View {
        VStack(alignment: .center) {
            HStack {
                Text(model.serviceName)
                
                Toggle(isOn: $model.selected) {
                    Text(String(format: "€ +%.2f", model.price))
                        .frame(maxWidth: .infinity, alignment: .trailing)
                }
            }
            .background(model.selected ? Color.yellow : Color.clear)
        }
    }
}

ServiceSelectorView

struct ServiceSelectorView: View {

    @ObservedObject var serviceSelectorVM = ServiceSelectorViewModel()

    var body: some View {
        VStack {
            VStack(alignment: .leading) {
                ForEach (serviceSelectorVM.services, id: \.id) { service in
                    ServiceToggleView(model: service)
                }
            }

            let price = serviceSelectorVM.services.filter{ $0.selected }.map{ $0.price }.reduce(0, +)

            Text("SELECTED: \(serviceSelectorVM.services.filter{ $0.selected }.count)")
            Text(String(format: "TOTAL PRICE: €%.2f", price))    
        }
    }
}

在這段代碼中，我可以更新模型的selected狀態(tài)，但是視圖模型包含所有模型，應(yīng)該刷新PRICE而不是更新。似乎數(shù)組中的模型沒(méi)有改變。

我忘了什么？