我试图使用一个@ObservableObject viewModel，它在我的视图结构中被声明为@ObservedObject。问题是，当viewModel更改它的“domains”属性@Published var时，UI不会更新。另外，我在init（）{}中调用的getDomains（）函数中更改域。它被称为两次，为什么会发生这种情况？下面是我的viewModel代码：

import Combine

class DomainsViewModel: ObservableObject {

    @Published var domains: [InterestDomain] = [InterestDomain]()
    
    init() {
        self.getDomains { (response) in
            print(response)
        }
    }
    
    func getDomains(completion: @escaping (Bool) -> Void) {
        NetworkEngine.shared.appNetwork.getInterestDomains { result in
            self.domains.removeAll()
            switch result {
            case .success(let domainsOfInterest):
                if let domainsList = domainsOfInterest {
                    self.domains = domainsList
                }
                completion(true)
            case .failure(_):
                completion(false)
            }
        }
    }

}

视图代码：导入Foundation导入SwiftUI导入合并

struct DomainsOfInterestView: View {

    @ObservedObject var viewModel: DomainsViewModel = DomainsViewModel()
    
    @State var isActive = true
    
    var body: some View {
            VStack(alignment: .center) {
                HStack {
                    Text("Choose domains of interest for your profile")
                        .font(.headline)
                    Spacer()
                }.padding(.bottom, 16)
                
                ForEach(viewModel.domains.indices) { index in
                    DomainOfInterestElement(isActive: self.$isActive, domain: self.viewModel.domains[index].name)
                }

                OrangeButton(action: {
                }) {
                    Text("Save")
                }.padding(.top, 30)
                    .padding([.leading, .trailing], 30)
                Spacer()
            }.padding([.leading, .trailing], 12)
            .navigationBarTitle("Domains of interest")
    }
}

struct DomainsOfInterestView_Previews: PreviewProvider {
    static var previews: some View {
    DomainsOfInterestView()
    }
}

struct DomainOfInterestElement: View {
    @Binding var isActive: Bool
    var domain: String
    var body: some View {
        Button(action: {
            self.isActive.toggle()
        }) {
            VStack {
                Divider().padding(.bottom, 12)
                HStack {
                    checkBoxView()
                        .frame(width: 36, height: 36)
                    textView().font(.custom("SFProDisplay-Regular", size: 16))
                    Spacer()
                }
            }
        }
    }
    
    func checkBoxView() -> Image {
        switch isActive {
        case true:
            return Image(uiImage: #imageLiteral(resourceName: "check-box-active-2-1")).renderingMode(.original)
        case false:
            return Image(uiImage: #imageLiteral(resourceName: "check-box-active-1")).renderingMode(.original)
        }
    }
    func textView() -> Text {
        switch isActive {
        case true:
            return Text(domain)
                .foregroundColor(.black)
        case false:
            return Text(domain)
                .foregroundColor(Color.orGrayColor)
        }
    }
}

有人能帮帮我吗？谢谢.