How to tell SwiftUI views to bind to more than one nested ObservableObject

Question

I have two classes nested in another class, which is an observable object in a SwiftUI view. Even though properties in the nested classes are declared as @Published, their value

Answer 1

You can expand upon the answer in the question you linked to by using CombineLatest to have your model fire its objectWillChange publisher when either of the underlying objects change:

import Combine

class Model: ObservableObject {
    @Published var submodel1: Submodel1 = Submodel1()
    @Published var submodel2: Submodel2 = Submodel2()

    var anyCancellable: AnyCancellable? = nil

    init() {
        anyCancellable = Publishers.CombineLatest(submodel1.$count,submodel2.$count).sink(receiveValue: {_ in
            self.objectWillChange.send()
        })
    }
}