SwiftUI NavigationItem不响应

编程问答 2022-08-13

问题描述

当我单击左箭头时，它应该关闭该视图，但是只有UI会响应，因为单击了该按钮并且未关闭NavigationLink推送的视图...

由另一个NavigationLink在另一个视图中推入的同一视图可以很好地工作，但是当由该NavigationLink推入时，我单击左箭头，则只有20倍的视图关闭了该视图。又是SwiftUI中的错误吗？有解决方法吗？

import SwiftUI
import Firebase
import struct Kingfisher.KFImage

struct SearchView: View {
    @Environment(\.presentationMode) var presentation
    @State var typedSearchValue = ""
    @State var createNewPost = false
    @State var showMessaging = false
    
    @EnvironmentObject var userInfo : UserData
    
    @Binding var switchTab: Int
    
    @State var text : String = ""
    @State var foundUsers: [FetchedUser] = []
    
    @State var showAccount = false
    @State var fetchedUser = FetchedUser()
    
    var body: some View {
        NavigationView {
            ZStack{
                // navigate to that user's profile << the problem navlink
                NavigationLink(destination:
                    UserAccountView(fetchedUser: self.$fetchedUser,showAccount: self.$showAccount)
                        .environmentObject(self.userInfo)
                        .environmentObject(FetchFFFObservable()),isActive: self.$showAccount
                ){
                    EmptyView()
                }.isDetailLink(false)
                
                //...
                NavigationLink(destination:
                    MessagingMainView(showMessaging: self.$showMessaging)
                        .environmentObject(UserData())
                        .environmentObject(MainObservable()),isActive: self.$showMessaging
                ){
                    Text("")
                }
                
                vstack(spacing: 0) {
                    SearchBarMsg(text: $text,foundUsers: $foundUsers)
                        .environmentObject(userInfo)
                        .padding(.horizontal)
                    vstack{
                        if text != ""{
                            
                            List(foundUsers,id: \.username){ user in
                                FetchedUserCellView(user: user)
                                    .environmentObject(self.userInfo)
                                    .onTapGesture {
                                        self.fetchedUser = user
                                        self.showAccount = true
                                }
                            }
                        }else{
                            
                            //....
                        }
                    }
                }
                .navigationBarColor(.titleBarColor)
            }
        }.navigationViewStyle(StackNavigationViewStyle())
        
    }
}

导航到该视图，尽管UI做出响应，但NavigationItems中的按钮不起作用

struct UserAccountView: View {
    @Environment(\.presentationMode) var presentation
    
 //...
    
    @Binding var showAccount : Bool
    

    
    
    
    
    var body: some View {
        vstack {
            //.....
            
        }
            
            .navigationBarColor(.titleBarColor)
            
            .navigationBarTitle(Text(fetchedUser.username),displayMode: .inline)
            .navigationBarItems(leading: Button(action: {
                //this button doesn't work!
                self.showAccount = false
                
            },label: {
                
                Image(systemName: "arrow.left")
                    .resizable()
                    .frame(width: 20,height: 15)
                   
                
            })).accentColor(.white)
        )
        
    }
}

解决方法

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