I am using firebase to store a users location into the database, and I am getting returned this, I am not sure if it is an error or just something was interpreted wrong:

[]\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\"]\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\"]\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\"]\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\"]\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\"]\\\\\\\\\\\\\\\"]\\\\\\\"]\\\"]\"]"]

This above but like 10x longer

Full Code:

import SwiftUI
import MapKit
import Firebase
import CoreLocationUI

struct MapView: View {
    
    @StateObject private var viewModel = ContentViewModel()
    
    @State var address = ""
    @State var addresses:[String] = []
    
    @State var realLat:[String] = []
    @State var realLong:[String] = []
    
    
    var body: some View {
        NavigationView {
            VStack {
                List(0..<realLat.count, id: \.self) {i in Text(realLat[i]) }
                    
                List(0..<realLong.count, id: \.self) {i in Text(realLong[i]) }
            }
            .onAppear(perform: {
                downloadLatServerData()
                downloadLongServerData()
            })
        }
    }
    
    func downloadLatServerData() {
        //address = "Tokyo"  // <--- here for testing
        //addresses.append(address) // <--- here for testing
        
        let db = Firestore.firestore()
        db.collection("UserInfo").addSnapshotListener {(snap, err) in
            if err != nil{
                print("\(String(describing: err))")
                return
            }
            for i in snap!.documentChanges {
                let documentId = i.document.documentID
                if let latCoordinate = i.document.get("lat") as? String {
                    DispatchQueue.main.async {
                        realLat.append(latCoordinate)
                        print("\(realLat)")
                    }
                }
            }
        }
    }
    
    func downloadLongServerData() {
        //address = "Tokyo"  // <--- here for testing
        //addresses.append(address) // <--- here for testing
        
        let db = Firestore.firestore()
        db.collection("UserInfo").addSnapshotListener {(snap, err) in
            if err != nil{
                print("\(String(describing: err))")
                return
            }
            for i in snap!.documentChanges {
                let documentId = i.document.documentID
                if let longCoordniate = i.document.get("long") as? String {
                    DispatchQueue.main.async {
                        realLong.append(longCoordniate)
                        print("\(realLong)")
                    }
                }
            }
        }
    }
    
}

Sample Numbers:

Lat: -9128653.12 Long: -917532

Did those numbers 4 times, for 4 different users.

CodePudding user response：

try this:

use realLat.append(latCoordinate) not realLat.append("\(realLat)")

and similarly for realLong.

use realLong.append(longCoordniate) not realLong.append("\(realLong)")