子视图未在父视图 SwiftUI 中触发禁用状态更新

我有两个带有嵌套视图模型的嵌套视图，需要确保对它们进行验证.

从本质上讲，ViewA有一个表单、一个提交按钮和一个子视图(ViewB)--ViewB的ViewModel包含在ViewBThis architecture cannot change due to boring business reasons中，ViewB有一些表单域.在启用提交按钮之前，我需要确保所有字段在视图A和视图B中都有效.

我似乎想不出如何做到这一点，因为ViewB中的任何更改都不会触发Viewa刷新

以下是一些简化的代码，作为粗略的示例

    class ViewModelB: ObservableObject {
    @Published var text = ""
    @Published var textTwo = ""
    
    func isValid() -> Bool {
        !text.isEmpty && !textTwo.isEmpty
    }
}

class ViewModelA: ObservableObject {
    @Published var text = ""
    @ObservedObject var addressViewModel: ViewModelB = ViewModelB()

    func isValid() -> Bool {
        print("is Valid called")
        return !text.isEmpty && addressViewModel.isValid()
    }
}
struct AddressView: View {
    @ObservedObject var viewModel: ViewModelB

    init(addressModel:ViewModelB) {
        self.viewModel = addressModel
    }
    var body: some View {
        TextField("View B Text", text: $viewModel.text)
        TextField("View B TextTwo", text: $viewModel.textTwo)
    }
}

struct ContentView: View {
    @StateObject var viewModel: ViewModelA = ViewModelA()

    var body: some View {
        VStack {
            TextField("View A Text", text: $viewModel.text)
            AddressView(addressModel: viewModel.addressViewModel)
            Button("Apply Button") {
                print("Button tapped!")
            }.disabled(!viewModel.isValid() || !viewModel.addressViewModel.isValid())
        }
    }
}