使用Swift 3从Firebase检索的数据填充TableView

Question

I've tried to retrieve data and set it into a tableview; I haven't really succeeded on this.

I want to fetch image and text into the tableView from firebase;

import UIKit
import Firebase

class HomePageViewController: UIViewController, UITableViewDelegate {

    @IBOutlet weak var homePageTableView: UITableView!

    var ref: DatabaseReference!
    var imageFiles = [Data]()
    var price = [String]()
    var refHandle:UInt!






    override func viewDidLoad() {
        super.viewDidLoad()

        ref = Database.database().reference()



        fetchUsers()

func fetchUsers() {

        refHandle = ref.child("Users").observe(.childAdded, with: { (<#DataSnapshot#>) in
            if let retrivedData = DataSnapshot.value(String : AnyObject) {
              ??? 
            }
        })

I'm aware of this is unfinished but I have no clue of how to continue from this point. How do I set it to the table??? and how Do I retrieve the data correctly. Can't find any documentation about this with the newest update firebase SDK and swift 3.0

Answer 1

The best practice is to feed the retrieved data into model objects and supply to the table view.

This is how modal objects looks like:

    class Person {
    var firstname: String
    var lastname: String

    init(firstname: String, lastname: String) {
        self.firstname = firstname
        self.lastname = lastname
    }
}

Now you have to feed the JSON data you got from firebase to this model objects. Once your model object is ready, you have to load the tableview. Tableview has data source methods. Use them to show how to populate data in tableview.

 func numberOfSections(in tableView: UITableView) -> Int {
            return 1
        }
        func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
            return modelObjectsArray.count
        }

        func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
            let cell = tableView.dequeueReusableCell(withIdentifier: "TableViewCell")!
            let modelObject = self.modelObjectsArray[indexPath.row] as! Person
            cell.textLabel?.text = modelObject.firstname
            return cell
        }