SwiftUI Picker with Cloud Firestore

问题

I was wondering whether I was able to get some help on this one, I've been trying a while to get things working and functioning properly and have been able to pass the Firestore data into the picker view, but I'm unable to select the data to view in the 'selected' area. I have added my code and my Firestore setup.

Thanks in advance.

import SwiftUI
import Firebase

struct SchoolDetailsView: View {
    
    @ObservedObject var schoolData = getSchoolData()
    @State var selectedSchool: String!

    var body: some View {
        VStack {
            Form {
                Section {
                    Picker(selection: $selectedSchool, label: Text("School Name")) {
                        ForEach(self.schoolData.datas) {i in
                            Text(self.schoolData.datas.count != 0 ? i.name : "No Schools Available").tag(i.name)

                        }
                    }
                    Text("Selected School: \(selectedSchool)")
                }
            }.navigationBarTitle("Select your school")

        }
    }
}

struct SchoolPicker_Previews: PreviewProvider {
    static var previews: some View {
        SchoolDetailsView()
    }
}

class getSchoolData : ObservableObject{
    
    @Published var datas = [schoolName]()
    
    init() {
        
        let db = Firestore.firestore()
        
        db.collection("School Name").addSnapshotListener { (snap, err) in
            
            if err != nil{
                
                print((err?.localizedDescription)!)
                return
            }
            
            for i in snap!.documentChanges{
                
                let id = i.document.documentID
                let name = i.document.get("Name") as! String
                
                self.datas.append(schoolName(id: id, name: name))
            }
        }
    }
}

struct schoolName : Identifiable {
    
    var id : String
    var name : String
}

Firestore Setup Image

来源：https://stackoverflow.com/questions/64458843/swiftui-picker-with-cloud-firestore