Pass Firebase Data from TableViewCell to ViewController - ios

Question

I've been trying multiple ways to pass my firebase data from a TableViewCell to a ViewController and can't figure out the simplest solution.
I have an EncounterTableViewController with EncounterTableViewCells. This is populated with Firebase data. When an EncounterTableViewCell is selected I want to pass the data to the EncounterDetailViewController.
EncountersTableViewController.swift
class EncountersTableViewController: UITableViewController {
var encounters : [Encounter] = []
// MARK: - View Did load
override func viewDidLoad() {
super.viewDidLoad()
showAllEncounters()
}
// MARK: - Encounter filters
func showAllEncounters() {
// Firebase tableview data
FIRDatabase.database().reference().child("encounters").observeSingleEvent(of: .value, with: { (snapshot) in
for rest in snapshot.children.allObjects as! [FIRDataSnapshot] {
guard let restDict = rest.value as? [String: Any] else { continue }
let encounter = Encounter()
encounter.sharkName = (restDict["shark_name"] as? String)!
encounter.date = (restDict["trip_date"] as? String)!
encounter.contributorName = (restDict["contributor"] as? String)!
encounter.contributorImage = (restDict["contributor_image"] as? String)!
let mediaDict = (restDict["media"] as? NSArray)
let firstImage = mediaDict![0] as! NSDictionary
encounter.mainImage = firstImage["thumb_url"] as! String
self.encounters.append(encounter)
self.tableView.reloadData()
}
})
}
// MARK: - Navigation
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if segue.identifier == "segueToEncounterCard" {
let destination = segue.destination as! EncounterDetailViewController
}
}
EncounterDetailViewController.swift
class EncounterDetailViewController: UIViewController {
// MARK: - Outlets
#IBOutlet weak var encounterDateLabel: UILabel!
#IBOutlet weak var locationLabel: UILabel!
#IBOutlet weak var lengthLabel: UILabel!
#IBOutlet weak var contributorNameLabel: UILabel!
#IBOutlet weak var contributorImageView: UIImageView!
// MARK: - Properties
var dictionary: [String:AnyObject]?
// MARK: - View did load
override func viewDidLoad() {
super.viewDidLoad()
}
}

Answer 1

Instead of passing dictionary you need to pass object of Encounter, so declare one instance property of type Encounter in your EncounterDetailViewController with named selectedEncounter. Now in prepareForSegue method of EncountersTableViewController pass the object of Encounter from array to this detailViewController.
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if segue.identifier == "segueToEncounterCard" {
let destination = segue.destination as! EncounterDetailViewController
if let indexPath = self.tableView.indexPathForSelectedRow {
destination.selectedEncounter = self.encounters[indexPath.row]
}
}
}
EncounterDetailViewController
class EncounterDetailViewController: UIViewController {
// MARK: - Outlets
#IBOutlet weak var encounterDateLabel: UILabel!
#IBOutlet weak var locationLabel: UILabel!
#IBOutlet weak var lengthLabel: UILabel!
#IBOutlet weak var contributorNameLabel: UILabel!
#IBOutlet weak var contributorImageView: UIImageView!
// MARK: - Properties
var selectedEncounter: Encounter?
// MARK: - View did load
override func viewDidLoad() {
super.viewDidLoad()
//access selectedEncounter property here and set all label's text
}
}

Answer 2

In EncountersTableViewController add the tableView delegate method, func tableView(UITableView, didSelectRowAt: IndexPath) and inside this method, you can get the selected encounter from encounter array by using indexPath.row. After you get the encounter you can performSegue(withIdentifier: "segueToEncounterCard" , sender: encounter ).
And in prepareForSegue method, you can get the encounter by casting sender value as Encounter object and you can pass the encounter to destination.