swiftui - ios14.2(SwiftUI)如何同时刷新detail view和master view

Question

嗨我想刷新由主视图下的数据更改触发的详细视图
我的方法是设置一个组合侦听器并从详细视图触发刷新
它在 ios13 上工作但我无法让它在 ios14.2 上工作，有什么解决方法吗？
这是我的主要观点。

import SwiftUI

struct MainView: View {
    
    @ObservedObject var viewModel : MainViewModel
    
    init(){
        viewModel = MainViewModel.shared
    }

    var body: some View {
        NavigationView{
            List {
                ForEach(viewModel.games ,id:\.self) { game in
                    NavigationLink(destination: self.navDest(game: game)){
                        Text("\(game)")
                    }
                }
            }
        }
    }
    
    func navDest(game: Int) -> some View{
        print("games value:",game)
        return LazyView(DetailView(game: game ))
    }
}

主视图模型监听来自细节视图的事件并更新值

import Foundation
import SwiftUI
import Combine


class MainViewModel : ObservableObject {

    @Published var games : [Int] = []
    static let shared = MainViewModel()
    private var tickets: [AnyCancellable] = []
    
    init(){
        for i in 0...5{
            games.append(i)
        }
        addObservor()
    }
    
    func addObservor(){
        NotificationCenter.default.publisher(for: .updateGame)
            .map{$0.object as! Int}
            .sink { [unowned self] (game) in
                self.updateGame(game: game)
            }.store(in: &tickets)
    }
    
    func updateGame(game:Int){
        print("updateView index:",game)
        self.games[game] = 9999
        print("after update",games)
    }
}



import SwiftUI

struct DetailView: View {
    
    @ObservedObject var viewModel : DetailViewModel
    
    init(game: Int) {
        print("init detail",game)
        viewModel = DetailViewModel(game:game)
    }
    
    var body: some View {
        VStack{
            Text("\(viewModel.game)")
            Button("update"){
                viewModel.sendUpdate()
            }
        }
    }
}

当我从详细视图单击更新时，它应该同时刷新主视图和详细视图。
（流程为 DetailViewModel->MainViewModel->Refresh MainView ->Refresh DetailView （当前正在显示））但它不适用于 iOS 14.2

    import Foundation
import SwiftUI


class DetailViewModel : ObservableObject {

    var period : String = ""
    var game : Int = 0
    
//    init(period:String,game: Int){
//        self.period = period
        init(game: Int){
        self.game = game
    }

    func sendUpdate(){
        NotificationCenter.default.post(name: .updateGame, object:  game)
    }
}

extension Notification.Name {
    static let updateGame = Notification.Name("updateGame")
   
}
struct LazyView<Content: View>: View {
    let build: () -> Content
    init(_ build: @autoclosure @escaping () -> Content) {
        self.build = build
    }
    var body: Content {
        build()
    }
}

详细视图

import SwiftUI

struct DetailView: View {
    
    @ObservedObject var viewModel : DetailViewModel
    
    init(game: Int) {
        print("init detail",game)
        viewModel = DetailViewModel(game:game)
    }
    
    var body: some View {
        VStack{
            Text("\(viewModel.game)")
            Button("update"){
                viewModel.sendUpdate()
            }
        }
    }
}

我已经记录了调试消息，看起来数据确实发生了变化，但视图没有。

标签： swiftuiios14