Pass Firebase data from UITableViewCell to ViewController - ios

Question

First post so apologies for anything I do wrong here.
I've been stuck on this for awhile now. I think the problem is pretty straight forward, but I seem to be missing something. The code below is from my homeVC which has a tableview. I created a tableViewCell as well. I have firebase hooked up and the data saves properly. Overall goal is to create a recipe manager. Home screen has a list of recipes, you can add and edit. When you click on the recipe name in the homeVC table you are taken to ShowDataVC. I am able to load the recipe name into the tableview but cant seem to get it to load when selected to the ShowDataVC. Ultimately I think I want to be able to use the UUID I created for each recipe to display all info, handling edits, handling error state if no recipe is found for that ID.
Thanks in advance!
struct RecipeData {
let user: String
let recipeName: String
let ingredientsText: String?
let directionsText: String?
let servingsNumber: Int?
let id = UUID().uuidString
}
import UIKit
import Firebase
class HomeViewController: UIViewController, UITableViewDelegate, UITableViewDataSource {
#IBOutlet weak var table: UITableView!
#IBOutlet weak var logout: UIBarButtonItem!
#IBOutlet weak var add: UIBarButtonItem!
let db = Firestore.firestore()
var id = UUID().uuidString
var data = [RecipeData]()
override func viewDidLoad() {
super.viewDidLoad()
view.backgroundColor = .gray
table.delegate = self
table.dataSource = self
navigationItem.hidesBackButton = true
table.register(UINib(nibName: D.cellNibName, bundle: nil), forCellReuseIdentifier: D.cellIdentifier)
loadRecipeNames()
}
func loadRecipeNames() {
db.collection(D.FStore.collectionName)
.addSnapshotListener { (querySnapshot, err) in
if let err = err {
print("Error getting documents: \(err)")
} else {
for document in querySnapshot!.documents {
let data = document.data()
if let user = data[D.FStore.userField] as? String,
let recipeNameLabels = data[D.FStore.recipeTextField] as? String {
//print("This is = \(document.documentID) => \(document.data())")
let newRecipe = RecipeData(user: user, recipeName: recipeNameLabels, ingredientsText: nil, directionsText: nil, servingsNumber: nil)
self.data.append(newRecipe)
DispatchQueue.main.async {
self.table.reloadData()
let indexPath = IndexPath(row: self.data.count - 1, section: 0)
self.table.scrollToRow(at: indexPath, at: .top, animated: true)
}
}
}
}
}
}
#IBAction func logoutPressed(_ sender: UIBarButtonItem) {
do {
try Auth.auth().signOut()
navigationController?.popToRootViewController(animated: true)
} catch let signOutError as NSError {
print("Error signing out: %#", signOutError)
}
}
#IBAction func addPressed(_ sender: UIBarButtonItem) {
let vc = UIStoryboard(name: "Main", bundle: nil).instantiateViewController(withIdentifier: D.addRecipeSegue) as! AddRecipeViewController
navigationController?.pushViewController(vc, animated: true)
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return data.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let data = data[indexPath.row]
let cell = table.dequeueReusableCell(withIdentifier: D.cellIdentifier, for: indexPath) as! RecipeNameCell
cell.label.text = data.recipeName
return cell
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
performSegue(withIdentifier: "ShowSegue", sender: self)
}
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if segue.identifier == "ShowSegue" {
if let indexPath = table.indexPathForSelectedRow {
let vc = segue.destination as! ShowRecipeDataViewController
vc.newData = data[indexPath.row]
}
}
}
}
import UIKit
import Firebase
class AddRecipeViewController: UIViewController, UIImagePickerControllerDelegate & UINavigationControllerDelegate {
#IBOutlet weak var recipeNameTextField: UITextField!
#IBOutlet weak var ingredientsTextField: UITextView!
#IBOutlet weak var directionsTextField: UITextView!
#IBOutlet weak var stepper: UIStepper!
#IBOutlet weak var numServingLabel: UILabel!
#IBOutlet weak var imageView: UIImageView!
#IBOutlet weak var takePicture: UIButton!
#IBOutlet weak var saveButton: UIBarButtonItem!
let db = Firestore.firestore()
var data: [RecipeData] = []
var stepperValue: Int = 0
var id = UUID().uuidString
override func viewDidLoad() {
super.viewDidLoad()
view.backgroundColor = .lightGray
}
#IBAction func savePressed(_ sender: UIBarButtonItem) {
if let text = recipeNameTextField.text, !text.isEmpty {
saveData(text: text)
print("Data successfully saved!")
}
}
func saveData(text: String) {
if let recipeName = recipeNameTextField.text,
let addedIngredients = ingredientsTextField.text,
let directionsText = directionsTextField.text,
let servingsNum = numServingLabel.text,
let user = Auth.auth().currentUser?.email {
let newRecipeRef = db.collection(D.FStore.collectionName).document(id)
newRecipeRef.setData([
D.FStore.recipeTextField: recipeName,
D.FStore.ingredientsText: addedIngredients,
D.FStore.directionsText: directionsText,
D.FStore.numberServings: servingsNum,
D.FStore.userField: user,
D.FStore.id: id
]) { err in
if let err = err {
print("Error adding document: \(err)")
} else {
print("Document added with ID:\(newRecipeRef)")
}
}
}
}
#IBAction func takePicturePressed(_ sender: UIButton) {
let picker = UIImagePickerController()
picker.sourceType = .camera
picker.delegate = self
picker.allowsEditing = true
present(picker, animated: true, completion: nil)
}
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
picker.dismiss(animated: true, completion: nil)
guard let image = info[UIImagePickerController.InfoKey.editedImage] as? UIImage else {
return
}
guard let imageData = image.pngData() else {
return
}
}
func imagePickerControllerDidCancel(_ picker: UIImagePickerController) {
picker.dismiss(animated: true, completion: nil)
}
#IBAction func stepperPressed(_ sender: UIStepper) {
stepperValue = Int(sender.value)
numServingLabel.text = "\(stepperValue)"
}
}
import UIKit
import Firebase
class ShowRecipeDataViewController: UIViewController {
#IBOutlet weak var recipeNameLabel: UILabel!
#IBOutlet weak var ingredientsText: UILabel!
#IBOutlet weak var directionsText: UILabel!
#IBOutlet weak var numServings: UILabel!
#IBOutlet weak var logout: UIBarButtonItem!
let db = Firestore.firestore()
var newData = [RecipeData]()
var data: [RecipeData] = []
var id = UUID().uuidString
override func viewDidLoad() {
super.viewDidLoad()
view.backgroundColor = .systemOrange
}
#IBAction func logoutPressed() {
do {
try Auth.auth().signOut()
navigationController?.popToRootViewController(animated: true)
} catch let signOutError as NSError {
print("Error signing out: %#", signOutError)
}
}
}

Answer 1

Update
You'll need to assign the values to your outlets. You can do that like so.
class ShowRecipeDataViewController: UIViewController {
#IBOutlet weak var recipeNameLabel: UILabel!
#IBOutlet weak var ingredientsText: UILabel!
#IBOutlet weak var directionsText: UILabel!
#IBOutlet weak var numServings: UILabel!
#IBOutlet weak var logout: UIBarButtonItem!
let db = Firestore.firestore()
var newData: RecipeData? = nil
var data: [RecipeData] = []
var id = UUID().uuidString
override func viewDidLoad() {
super.viewDidLoad()
view.backgroundColor = .systemOrange
}
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
guard let newData = newData else {
return
}
recipeNameLabel.text = newData.recipeName
ingredientsText.text = newData.ingredientsText
directionsText.text = newData.directionsText
numServings.text = "\(newData.servingsNumber)"
}
#IBAction func logoutPressed() {
do {
try Auth.auth().signOut()
navigationController?.popToRootViewController(animated: true)
} catch let signOutError as NSError {
print("Error signing out: %#", signOutError)
}
}
}
Original Answer
You'll need to share your ShowRecipeDataViewController code to get a better answer. But, the problem is probably there. But if I had to guess you'll need to add the code to tell the textField or Label to have the data in it.
Often, people do that in the ViewDidLoad function like:
// inside ShowRecipeDataViewController
override func viewDidLoad() {
super.viewDidLoad()
recipeLabel.text = data.recipeName
ingredientsTextField.text = data.ingredients
}
// etc.,