Screenshot of Firestore Project
I want to display the "first_name" field for each document in the collection (In the UITableView. The UITableView just shows up blank every time I run the app.
CODE:
import UIKit
import Firebase
class HomeViewController: UIViewController, UITableViewDelegate, UITableViewDataSource {
#IBOutlet weak var filterButton: UIButton!
#IBOutlet weak var userTableView: UITableView!
var usersArray = [String]()
var db: Firestore!
override func viewDidLoad() {
super.viewDidLoad()
userTableView.delegate = self
userTableView.dataSource = self
// Do any additional setup after loading the view.
db = Firestore.firestore()
loadData()
}
func loadData() {
db.collection("users").getDocuments() { (querySnapshot, err) in
if let err = err {
print("Error getting documents: \(err)")
} else {
for document in querySnapshot!.documents {
self.usersArray.append(document.documentID)
}
}
print(self.usersArray)
self.userTableView.reloadData()
}
}
func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
print("Tableview setup \(usersArray.count)")
return usersArray.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = userTableView.dequeueReusableCell(withIdentifier: "userCell", for: indexPath) as! UserCell
let user = usersArray[indexPath.row]
cell.fullNameLabel.text = user
print("Array is populated \(usersArray)")
return cell
}
}
Doesn't look like you registered the cell to the tableView. Try using: tableview.register(UserCell,forCellReuseIdentifier:"Your reuseIdentifier string"). Try inserting this in viewDidLoad.
Related
I'm trying to save collection into an array of objects called List, and the retrieving is been called in viewdidload by the function loadfirebase. So it actually retrieves the data from firebase and prints it but it doesn't save it in the array. I think it is something that deals with closure but not sure how to fix it.
//
// ContactList.swift
// Socket
//
// Created by dalal aljassem on 12/16/21.
//
import UIKit
import FirebaseFirestore
import FirebaseStorage
class ContactList: UIViewController, UITableViewDelegate, UITableViewDataSource {
private let storage = Storage.storage().reference()
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return List.count
}
func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "cell" , for:indexPath)
var currentname = List[indexPath.row]
cell.textLabel?.text = currentname.name
return cell
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath){
print("some action will happen when i tap here")
}
#IBOutlet var tableView: UITableView!
override func viewDidLoad() {
super.viewDidLoad()
tableView.delegate = self
tableView.dataSource = self
loadfirebase()
print("**************",List)
}
}
let database = Firestore.firestore()
func loadfirebase()
{
let contactdataRef = database.collection("ContactData")
contactdataRef.getDocuments() { (querySnapshot, err) in
if let err = err {
print("Error getting documents: \(err)")
} else {
for document in querySnapshot!.documents {
// var currentDoc = document.data()
print("///////////////")
// print("current doc = " , currentDoc)
print("current name = " , document.get("name")!)
print("current image = " , document.get("image")!)
List.append(Contact(name: document.get("name") as! String, image: document.get("image") as! String, number: ""))
print("\(document.documentID) => \(document.data())")
}
}
}}
}
Your List array is never initialized.
You can achieve this with the following code:
var List: [Contact] = []
and I would put this before the declaration of tableView function.
I have a Table View that is working fine. However, when I try to implement a UISearchBar and display filtered data, nothing gets filtered. This is my View Controller:
import UIKit
class MealPlanViewController: UIViewController, UISearchBarDelegate {
private var model = MealPlanModel()
private var mealPlan = [MealPlan]()
var filteredData: [MealPlan]!
#IBOutlet weak var topBarStackView: UIStackView!
#IBOutlet weak var searchBar: UISearchBar!
#IBOutlet weak var tableView: UITableView!
override func viewDidLoad() {
super.viewDidLoad()
tableView.delegate = self
tableView.dataSource = self
model.delegate = self
searchBar.delegate = self
filteredData = mealPlan
}
func searchBar(_ searchBar: UISearchBar, textDidChange searchText: String) {
filteredData = []
if searchText == "" {
filteredData = mealPlan
}
else {
for item in mealPlan {
if ((item.title?.lowercased().contains(searchText.lowercased())) != nil) {
filteredData.append(item)
}
}
}
self.tableView.reloadData()
}
}
extension MealPlanViewController: UITableViewDelegate, UITableViewDataSource {
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return filteredData.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "MealPlanCell", for: indexPath) as! MealPlanCell
let filteredMealPlaninTable = filteredData[indexPath.row]
cell.displayMealPlan(filteredMealPlaninTable)
return cell
}
}
extension MealPlanViewController: MealPlanProtocol {
func mealPlansRetrieved(mealPlans: [MealPlan]) {
self.filteredData = mealPlans
tableView.reloadData()
}
}
A couple of notes:
When I run a print(self.filteredData) in my `func mealPlansRetrieved', the console returns all of my data as if it wasn't filtered, but
As soon as I start typing in the search bar, the table view doesn't return any cells, which seems contradictory to the above
For reference, this is the code before filtering that did work:
extension MealPlanViewController: UITableViewDelegate, UITableViewDataSource {
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return mealPlan.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "MealPlanCell", for: indexPath) as! MealPlanCell
let mealPlanInTable = mealPlan[indexPath.row]
cell.displayMealPlan(mealPlanInTable)
return cell
}
}
extension MealPlanViewController: MealPlanProtocol {
func mealPlansRetrieved(mealPlans: [MealPlan]) {
self.mealPlan = mealPlans
tableView.reloadData()
}
}
Any help/guidance is much appreciated!
Contains returns boolean so this will never fail: item.title?.lowercased().contains(searchText.lowercased())) != nil
To make check work you can simply remove "!= nil".
Im not sure from where you are calling mealPlansRetrieved, but you might want to keep the line "self.mealPlan = mealPlans" instead of "self.filteredData = mealPlans".
So I have been trying to get my custom cells to show up on this tableview, but I am not sure as to why they are not showing up
I have already checked other stack overflow questions and tried their fixes, to no avail. Please ignore the aws stuff as you can see I have the text hard coded so I can just get them to appear for now.
This is the code within the class holding the tableview
import Foundation
import AWSDynamoDB
import AWSCognitoIdentityProvider
import UIKit
// this will be the main feed class showing the user data
class UserDetailTableViewController : UITableViewController {
// attributes for the custome cell
#IBOutlet weak var testing: UITextField!
#IBOutlet var Table: UITableView!
var response: AWSCognitoIdentityUserGetDetailsResponse?
var user: AWSCognitoIdentityUser?
var pool: AWSCognitoIdentityUserPool?
var questiondata : Array<Phototext> = Array()
override func viewDidLoad() {
tableView.delegate = self
tableView.dataSource = self
super.viewDidLoad()
self.pool = AWSCognitoIdentityUserPool(forKey: AWSCognitoUserPoolsSignInProviderKey)
if (self.user == nil) {
self.user = self.pool?.currentUser()
}
// grabbing data from our aws table
updateData()
self.refresh()
}
override func viewWillDisappear(_ animated: Bool) {
super.viewWillDisappear(animated)
self.navigationController?.setToolbarHidden(true, animated: true)
}
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
self.navigationController?.setToolbarHidden(false, animated: true)
}
#IBAction func Questions(_ sender: Any) {
performSegue(withIdentifier: "ask", sender: self)
}
// MARK: - IBActions
#IBAction func signOut(_ sender: AnyObject) {
self.user?.signOut()
self.title = nil
self.response = nil
self.refresh()
}
// reloads the prior view
func refresh() {
self.user?.getDetails().continueOnSuccessWith { (task) ->
AnyObject? in
DispatchQueue.main.async(execute: {
self.response = task.result
self.title = self.user?.username
// saving the user name from the main menu
username123 = self.user?.username! ?? "broken"
})
return nil
}
}
// function that calls to our aws dynamodb to grab data from the
// user
//and re update questions
// the array list
func updateData(){
let scanExpression = AWSDynamoDBScanExpression()
scanExpression.limit = 20
// testing to grabt the table data upon startup
let dynamoDBObjectMapper = AWSDynamoDBObjectMapper.default()
dynamoDBObjectMapper.scan(Phototext.self, expression:
scanExpression).continueWith(block: {
(task:AWSTask<AWSDynamoDBPaginatedOutput>!) -> Any? in
if let error = task.error as NSError? {
print("The request failed. Error: \(error)")
} else if let paginatedOutput = task.result {
// passes down an array of object
for Photo in paginatedOutput.items as! [Phototext] {
// loading in the arraylist of objects
// adding the objects to an arraylist
self.questiondata.append(Photo)
}
DispatchQueue.main.async {
//code for updating the UI
}
}
return ()
})
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
// returning the number of rows
return 3
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath:
IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier:
"Questionpost", for: indexPath) as! QuestionCell
cell.QuestionText.text = "call it"
cell.Subject.text = "a day"
return cell
}
}
}
Here is the code for the QuestionCell class
import UIKit
class QuestionCell: UITableViewCell {
#IBOutlet weak var Subject: UILabel!
#IBOutlet weak var QuestionText: UITextView!
}
The cell class is called QuestionCell and the identifier I left on the cell in the storyboard is Questionpost
Here is a photo of my story board:
I have fixed it by declaring an extension with the proper types.
extension UserDetailTableViewController: UITableViewDataSource,UITableViewDelegate{
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
// returning the number of rows
return 3
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "Questionpost", for: indexPath) as! QuestionCell
cell.QuestionText.text = "call it"
cell.Subject.text = "a day"
return cell
}}
good explanation of what's going on, you need to conform to the UITableViewDataSource and UITableViewDelegate when you inbed a tableview.
Redundant conformance of TableView to protocol UITableViewDataSource with Xib Files
I am trying to call all of my entries of coreData .color. The problem is only 1 entry of coreData is being called to the label. I would like all of the entities of coreData to be printed on the label not just the latest one, which the code is currently doing.
import UIKit
class ViewController: UIViewController {
#IBOutlet weak var tableView: UITableView!
#IBOutlet var label: UILabel!
var users = [User]()
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
tableView.dataSource = self
if CDHandler.fetchObject() != nil {
users = CDHandler.fetchObject()!
tableView.reloadData()
}
}
}
extension ViewController: UITableViewDataSource {
func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return users.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = UITableViewCell(style: .subtitle, reuseIdentifier: nil)
cell.textLabel?.text = users[indexPath.row].username
for c in users {
label.text = c.color
}
return cell
}
}
Actually your current loop sets the last item of the array to the label text , so Try this to append values together
for c in users {
label.text = "\((label.text)!)+\((c.color)!)"
}
I'm trying to populate a table view from a SQlite database. Tickets get printed in the console, but nothings shows up on the table view. What's the proper way to update and refresh? Here is my code. Thanks!
import UIKit
import SQLite
class TicketTableViewController: UIViewController, UITableViewDataSource, UITableViewDelegate {
var tickets = [String]()
#IBOutlet weak var table: UITableView!
override func viewDidLoad() {
super.viewDidLoad()
let dm = DatabaseManager.shared
let db = dm.db!
do {
for row in try db.prepare(dm.tickets) {
let ticket = row[dm.pick]
tickets.append(ticket)
debugPrint(ticket)
}
table.reloadData()
} catch {}
}
func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return tickets.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "ticket")!
cell.detailTextLabel!.text = tickets[indexPath.row]
return cell
}
}
Dynamic table views needs to know their delegate and datasource. If you didn't set the delegate and datasource, you can add them programmatically in your viewDidLoad function. Like this:
override func viewDidLoad() {
super.viewDidLoad()
//Set delegate and datasource
table.delegate = self
table.dataSource = self
let dm = DatabaseManager.shared
let db = dm.db!
do {
for row in try db.prepare(dm.tickets) {
let ticket = row[dm.pick]
tickets.append(ticket)
debugPrint(ticket)
}
table.reloadData()
} catch {}
}