Display firebase document field to iOS tableview - swift

Question

How can one display the data from the Firestore Collections to tableView on Swift?
This code runs (see below) but I want to import directly from the Firestore database instead of hardtyping data:
var habits = [Habit(id: "1", author: "Maiuran", text: "heyhey")]
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "habitCell", for: indexPath) as! HabitTableViewCell
cell.set(habit: habits[indexPath.row])
return cell
}
The code below works to print to the console but not sure how to display the
let name = Auth.auth().currentUser?.uid
Firestore.firestore().collection("habits").whereField("author", isEqualTo: name).getDocuments() { (querySnapshot, err) in
if let err = err {
print("Error getting documents: \(err)")
} else {
for document in querySnapshot!.documents {
print("\(document.documentID) => \(document.data())")
}
}
}
This is the database: Firestore Database structure
Thank you so much for your time and advice!

Answer 1

You have to check user: if user == nil you must login user before.
override func viewDidLoad() {
super.viewDidLoad()
let user = Auth.auth().currentUser
if user == nil {
login()
} else {
// processing
}
}

Answer 2

Here is a partial solution (now it posts to a given UITextfield so just need to figure out how to post to tableView):
Firestore.firestore().collection("habits").getDocuments(completion: { (snapshot, error) in
snapshot!.documents.forEach({ (document) in
let nametyname = document.data()["author"]
let street = document.data()["friend"]
self.myTextiFieldi.text = nametyname as! String
print(nametyname)
print(street)
})
})