SwiftUI使用.NavigationDestination后，按下按钮后应用程序会返回到视图。

Question

将代码更改为使用NavigationStack和列表来列出可点击的项目，这些项目会打开不同的视图。单击项目会更改视图一秒钟，然后反弹回到HomeView。

HomeView.swift

`

//
//  HomeView.swift
//  LDMT
//
//  Created by Aniruddha Pandit on 2022/9/18.
//

import SwiftUI
import Firebase

struct HomeView: View {
    
    @StateObject var vm = SearchVar()
    @EnvironmentObject private var AuthModel: AuthViewModel
    @EnvironmentObject var viewRouter: ViewRouter
    @State var signOutProcessing = false
    @State private var query = ""
    private var cases : [Case] = Case.allCase
    
    
    func signOutUser() {
        signOutProcessing = true
        let firebaseAuth = Auth.auth()
        do {
            try firebaseAuth.signOut()
            
        } catch let signOutError as NSError {
            print("Error signing out: %@", signOutError)
            signOutProcessing = false
        }
        withAnimation {
            viewRouter.currentPage = .signInPage
        }
    }
    
    var body: some View {
        if #available(iOS 16.0, *) {
            NavigationStack {
                List {
                    ForEach(cases) { Cases in
                        NavigationLink(Cases.cnrNumber, value: Cases)
                    }
                    .padding(12)
                }
                .navigationDestination(for: Case.self) { cases in
                    DetailView(cases: cases)
                }
                .toolbar {
                    ToolbarItem(placement: .navigationBarTrailing) {
                        if signOutProcessing {
                            ProgressView()
                        } else {
                            Button("Sign Out") {
                                signOutUser()
                            }
                        }
                    }
                }
                .navigationTitle("Case List")
            }
            .searchable(text: $query, placement: .automatic, prompt: "Search by Case...") {
                
            }
            .onSubmit(of: .search) {
                vm.search(with: query)
                print(type(of: vm.filteredData))
            }
            .onAppear {
                vm.search()
            }
        } else {
            // add a fall back for NavigationStack
        }
    }
}
    
    
    struct HomeView_Previews: PreviewProvider {
        static var previews: some View {
            HomeView()
        }
    }

`

DetailView

//
//  DetailView.swift
//  LDMT
//
//  Created by Aniruddha Pandit on 2022/10/5.
//

import SwiftUI

struct DetailView: View {
    var cases : Case
    @EnvironmentObject var viewRouter: ViewRouter
    
    func myExibit() {
        withAnimation {
            viewRouter.currentPage = .evidencePage
        }
    }
    
    func myCases() {
        withAnimation {
            viewRouter.currentPage = .homePage
        }
    }
    
    var body: some View {
        if #available(iOS 16.0, *) {
            NavigationStack {
                List {
                    Text("CNR Number : \(cases.cnrNumber)")
                        .font(.headline)
                        .fontWeight(.semibold)
                    Text("Petition And Advocate : \(cases.petitionerAndAdvocate)")
                        .font(.headline)
                        .fontWeight(.semibold)
                    Text("Respondant And Advocate : \(cases.respondantAndAdvocate)")
                        .font(.headline)
                        .fontWeight(.semibold)
                    Text("Court : \(cases.court)")
                        .font(.headline)
                        .fontWeight(.semibold)
                    Text("Registration Date : \(cases.registrationDate)")
                        .font(.headline)
                        .fontWeight(.semibold)
                    Text("Registration Number : \(cases.registrationNumber)")
                        .font(.headline)
                        .fontWeight(.semibold)
                    Text("Filing Date : \(cases.filingDate)")
                        .font(.headline)
                        .fontWeight(.semibold)
                    Text("Filing Number : \(cases.filingNumber)")
                        .font(.headline)
                        .fontWeight(.semibold)
                    Text("First Hearing Date : \(cases.firstHearingDate)")
                        .font(.headline)
                        .fontWeight(.semibold)
                    Text("Next Hearing Date : \(cases.nextHearingDate)")
                        .font(.headline)
                        .fontWeight(.semibold)
                }
                .toolbar {
                    ToolbarItem(placement: .navigationBarTrailing) {
                        Button("My Evidence") {
                            myExibit()
                        }
                    }
                    ToolbarItem(placement: .navigationBarLeading) {
                        Button("My Cases") {
                            myCases()
                        }
                    }
                }
            }
        } else {
            // Fallback on earlier versions
        }
    }
}

struct DetailView_Previews: PreviewProvider {
    static var previews: some View {
        DetailView(cases: Case.sampleCase)
    }
}

我是否错误地使用了.navigationDestination？我的最终目标只是在点击时更改视图。如果这个问题已经有答案了，对不起，我还是Swift的新手，还在学习中。

我尝试遵循应用程序开发人员文档，但是对于.navigationDestination而言，文档并不多。

- Aniruddha Pandit

---

你可能不应该在 DetailView 中使用另一个 NavigationStack，尝试将其移除。 - workingdog support Ukraine

Answer 1

我曾经遇到过同样的问题。

我通过从详细视图中删除NavigationStack {}来解决它，然后它立即起作用了。

- Romin