Trying to display my "messages" in a table view, for some reason it isn't showing up, tried everything and cannot see my issue.
Any help is appreciated.
class StatusViewController: UIViewController, UITableViewDelegate, UITableViewDataSource {
#IBOutlet weak var dataView: UITableView!
var array = [String]()
var ref:FIRDatabaseReference?
var databaseHandle:FIRDatabaseHandle?
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view:
// Setting firebase database reference:
ref = FIRDatabase.database().reference()
// Retrieve the users
databaseHandle = ref?.child("message").observe(.childAdded, with: { (snapshot) in
if let item = snapshot.value as? String{
self.array.append(item)
self.dataView.reloadData()
}
})
self.dataView.delegate = self
self.dataView.dataSource = self
}
// "$uid === auth.uid"
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return array.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = dataView.dequeueReusableCell(withIdentifier: "PostCell")! as UITableViewCell
cell.textLabel?.text = array[indexPath.row]
return cell
}
// Back To App View Controller:
#IBAction func BackToStatus(_ sender: Any) {
self.dismiss(animated: true, completion: nil)
self.performSegue(withIdentifier: "BackToStatus", sender: nil)
}
}
Database Rules
Users and Messages I am trying to display
Related
I'm trying to implement the didSelectRow function and perform a segue but when running the cells select and nothing happens.
I created a print statement that also doesn't run which proves that the function doesn't appear to be firing. Why would this be?
I have checked the identifier is correct and have researched these for a few hours going through many stack overflow threads but with little luck.
import UIKit
import CoreData
class HomeViewController: UIViewController, UITableViewDelegate, UITableViewDataSource {
let viewController = ListNameViewController()
let context = (UIApplication.shared.delegate as? AppDelegate)?.persistentContainer.viewContext
var itemChoosen = 0
override func viewDidLoad() {
super.viewDidLoad()
homeListsTableView.delegate = self
homeListsTableView.dataSource = self
viewController.loadList()
}
#IBOutlet weak var homeListsTableView: UITableView!
#IBAction func templatesButton(_ sender: Any) {
tabBarController?.selectedIndex = 2
}
#IBAction func allListsButton(_ sender: Any) {
tabBarController?.selectedIndex = 0
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return viewController.listName.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath)
let result = viewController.listName[indexPath.row]
cell.textLabel?.text = ("\(String(result.listName!))")
return cell
}
func tableView(_ tableView: UITableView, commit editingStyle: UITableViewCell.EditingStyle, forRowAt indexPath: IndexPath) {
if editingStyle == .delete {
context!.delete(viewController.listName[indexPath.row])
viewController.listName.remove(at: indexPath.row)
viewController.saveList()
homeListsTableView.reloadData()
}
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
performSegue(withIdentifier: "items2", sender: self)
print("selected")
}
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(false)
viewController.loadList()
homeListsTableView.reloadData()
}
override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(true)
homeListsTableView.reloadData()
}
}
ListNameViewController:
import UIKit
import CoreData
class ListNameViewController: UIViewController, UITableViewDelegate {
let context = (UIApplication.shared.delegate as? AppDelegate)?.persistentContainer.viewContext
var listName : [ListName] = []
override func viewDidLoad() {
super.viewDidLoad()
createButtonChange.isEnabled = false
//Objective-C Line used to keep checking if the text field is vaild before enabling the submit button
listNameValue.addTarget(self, action: #selector(textValidation), for: UIControl.Event.editingChanged)
}
#IBOutlet weak var listNameValue: UITextField!
#IBOutlet weak var locationOption: UITextField!
#IBOutlet weak var createButtonChange: UIButton!
#objc func textValidation() {
//Text Field Validation check before button is enabled
if listNameValue.text!.isEmpty {
createButtonChange.isEnabled = false
} else {
createButtonChange.isEnabled = true
}
}
// Create a new List
#IBAction func createButton(_ sender: Any) {
let newList = ListName(context: context!)
newList.listName = listNameValue.text
saveList()
self.navigationController!.popViewController(animated: true)
viewWillAppear(false)
}
func saveList() {
do {
try context!.save()
} catch {
print("Error saving context \(error)")
}
}
func loadList() {
let request : NSFetchRequest<ListName> = ListName.fetchRequest()
do{
listName = try context!.fetch(request)
} catch {
print("Error loading categories \(error)")
}
}
//Pass data to the HomeViewController
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
// let vc = segue.destination as! HomeViewController
}
}
// commented out core data and just used a normal array for testing.
Did you add segue in your storyboard for the tableview ? In this case the didSelect is not call but the prepare(for segue) of the tableview controller is called.
Ok solved it - There was a rouge tap gesture recognizer on the page. Removed it and works on one click. I have seen that if you wish to keep the gesture just add this line of code at the top of the function:
tap.cancelsTouchesInView = false
Took three days but I got there. Thanks for the help!
I am trying to delete a cell in the tableview from another view controller. I have modeled my code similar to the question posted below but I still can't seem to successfully delete the selected row/cell in the CalorieVC when the delete button is pressed in the DeleteVC
Deleting a row of a tableview from another viewcontroller
SideNote: there is button in the cells to popup the DeleteVC, I am also getting an error upon pressing the the deleteBtn in the CalorieVC: DeleteRowInTableviewDelegate on let picked saying Thread 1: Fatal error: Index out of range
import UIKit
class CalorieViewController: UIViewController {
var selectedFood: FoodList! // allows data to be passed into the CalorieVC
var deleteItems: CalorieItem? // passes data to DeleteVC
// allows data to be sepearted into sections
var calorieItems: [CalorieItem] = []
var groupedCalorieItems: [String: [CalorieItem]] = [:]
var dateSectionTitle: [String] = []
#IBOutlet weak var tableView: UITableView!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
tableView.dataSource = self
tableView.delegate = self
// Allows data in cells to seperate by section
groupedCalorieItems = Dictionary(grouping: calorieItems, by: {$0.foodList.date})
dateSectionTitle = groupedCalorieItems.map{$0.key}.sorted()
}
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if segue.identifier == "DeleteSegue" {
let vc: DeleteViewController = segue.destination as! DeleteViewController
vc.deleteItems = self.deleteItems
// vc.delegate = self
}
}
}
extension CalorieViewController: UITableViewDelegate, UITableViewDataSource{
func numberOfSections(in tableView: UITableView) -> Int {
return dateSectionTitle.count
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
let date = dateSectionTitle[section]
return groupedCalorieItems[date]!.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let calorieCell = tableView.dequeueReusableCell(withIdentifier: "CalorieCell") as! CalorieCell
let date = dateSectionTitle[indexPath.section]
let caloriesToDisplay = groupedCalorieItems[date]![indexPath.row]
calorieCell.configure(withCalorieItems: caloriesToDisplay.foodList)
return calorieCell
}
func tableView(_ tableView: UITableView, viewForHeaderInSection section: Int) -> UIView? {
let calorieHeader = tableView.dequeueReusableCell(withIdentifier: "CalorieHeader") as! CalorieHeader
let headerTitle = dateSectionTitle[section]
calorieHeader.dateLbl.text = "Date: \(headerTitle)"
return calorieHeader
}
func tableView(_ tableView: UITableView, heightForHeaderInSection section: Int) -> CGFloat {
return 45
}
func tableView(_ tableView: UITableView, viewForFooterInSection section: Int) -> UIView? {
let calorieFooter = tableView.dequeueReusableCell(withIdentifier: "CalorieFooter") as! CalorieFooter
//Cell Total Code
let date = dateSectionTitle[section]
let subtotal = groupedCalorieItems[dispensary]?.map { $0.getCalorieTotal() }.reduce(0, +) ?? 0
calorieFooter.calorieTotal.text = String(subtotal!)
return calorieFooter
}
func tableView(_ tableView: UITableView, heightForFooterInSection section: Int) -> CGFloat {
return 150
}
}
extension CalorieViewController: DeleteRowInTableviewDelegate {
func deleteRow(inTableview rowToDelete: Int) {
let picked = dateSectionTitle[rowToDelete]
let selectedCell = groupedCalorieItems[dod]
delete(selectedCell)
// calorieItems.remove(at: rowToDelete) // tried using this and I get an error code upon segueing back to the CalorieVC
tableView.reloadData()
}
}
import UIKit
protocol DeleteRowInTableviewDelegate: NSObjectProtocol {
func deleteRow(inTableview rowToDelete: Int)
}
class DeleteViewController: UIViewController {
var modifyItems: CartItem!
var delegate: DeleteRowInTableviewDelegate?
#IBOutlet weak var deleteLbl: UILabel!
#IBOutlet weak var deleteBtn: UIButton!
#IBOutlet weak var cancelBtn: UIButton!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
if isMovingFromParent {
delegate!.deleteRow(inTableview: 1)
}
deleteLbl.text = "Are you sure you want to delete this Food Item from your calorie List?"
}
#IBAction func decline(_ sender: Any) {
dismiss(animated: true)
delegate!.deleteRow(inTableview: 1)
print("Delete Item")
}
#IBAction func cancel(_ sender: Any) {
dismiss(animated: true)
print("Cancel Delete")
}
}
Remove the value from the dataSource
Remove the table cell
extension CalorieViewController: DeleteRowInTableviewDelegate {
func deleteRow(inTableview rowToDelete: Int) {
if caloriesItems.count > rowToDelete {
calorieItems.remove(at: rowToDelete)
tableView.deleteRows(at: [IndexPath(row: rowToDelete, section: 0)], with: .automatic)
} else {
print("index not present")
}
}
}
Do not call reloadData just to delete one row. This is a bad practice.
Use deleteRows instead.
UITableview is visible while the cells aren't.
This is for a food ordering app, and I'm trying to display the menu. I've tried everything, no error has shown, but the cells ain't visible
import UIKit
import FirebaseDatabase
import FirebaseCore
class MenuVC: UIViewController, UITableViewDelegate, UITableViewDataSource {
var menu = [Food]()
var ref: DatabaseReference?
#IBOutlet weak var tableView: UITableView!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
tableView.delegate = self
tableView.dataSource = self
ref = Database.database().reference()
loadMenu()
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return menu.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
if let cell = tableView.dequeueReusableCell(withIdentifier: "menuCell") as? MenuCell {
let foodItem = menu[indexPath.row]
cell.configCell(food: foodItem)
return cell
}else{
return UITableViewCell()
}
}
func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
performSegue(withIdentifier: "popup", sender: menu[indexPath.row])
}
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if let popupVC = segue.destination as? MenuPopUpVC {
if let foodItem = sender as? Food{
popupVC.config(food: foodItem)
}
}
}
func loadMenu() {
ref?.child("menu").observe(.value, with: { (snapshot) in
for child in snapshot.children {
let snap = child as! DataSnapshot
let dict = snap.value as! [String: Any]
let foodName = dict["name"] as! String
print(foodName)
let foodPrice = dict["price"] as! String
let foodImg = dict["image"] as! String
let foodItem = Food(name: foodName, price: foodPrice, img: foodImg)
self.menu.append(foodItem)
}
})
}
}
import UIKit
import SDWebImage
class MenuCell: UITableViewCell {
#IBOutlet weak var PriceLbl: UILabel!
#IBOutlet weak var menuImg: UIImageView!
#IBOutlet weak var menuItemLbl: UILabel!
override func awakeFromNib() {
super.awakeFromNib()
// Initialization code
}
override func setSelected(_ selected: Bool, animated: Bool) {
super.setSelected(selected, animated: animated)
// Configure the view for the selected state
}
func configCell(food : Food) {
let name = food.name ?? ""
menuItemLbl.text = name
let price = food.price ?? ""
PriceLbl.text = "$\(price)"
menuImg.sd_setImage(with: URL(string: food.img!)) {[weak self] (image, error, cachetype, url) in
if error == nil{
self?.menuImg.image = image
}
}
}
}
You don't reload data of your TableView, reload them after you append all foods to menu array (means after foreach loop)
ref?.child("menu").observe(.value, with: { (snapshot) in
for child in snapshot.children {
...
self.menu.append(foodItem)
}
self.tableView.reloadData()
})
You need to reload the tableView after you fill the array
self.menu.append(foodItem)
}
self.tableView.reloadData()
Also inside cellForRowAt , it's a good practice to
let cell = tableView.dequeueReusableCell(withIdentifier: "menuCell") as! MenuCell
without the misleading return UITableViewCell()
I am trying to finish this app that is a form. once filled out a button later will be pushed for print. The first controller has a tableview that has page 1 page 2 page 3. page 1 opens and you fill in all info. when hit save it should take you back to first controller. then when you push print opens the tableview and loads all info.
I am struggling to use structs correctly. also struggling on the save button to the delegate to the print controller page.
my page controller code
class PagesController: UIViewController, UITableViewDelegate {
var pages = ["Page 1","Page 2","Page 3"]
#IBOutlet weak var pagesTableView: UITableView!
override func viewDidLoad() {
super.viewDidLoad()
pagesTableView.delegate = self
pagesTableView.dataSource = self
}
#IBAction func printBtnPressed(_ sender: Any) {
} }
extension PagesController: UITableViewDataSource {
func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return pages.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "PagesCell")
cell?.textLabel?.text = pages[indexPath.row]
return cell!
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
if indexPath.row == 0 {
performSegue(withIdentifier: "ChildInfoSegue", sender: self)
}
}
func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
return 90.0
}
}
Heres my form controller
protocol ChildDelegate {
func saveInfoBlock(form: ChildInfo)
}
class ChildInfoTableViewController: UITableViewController {
var formDelegate: ChildDelegate!
var firstNameText: UITextField = UITextField()
var lastNameText: UITextField = UITextField()
var middleNameText: UITextField = UITextField()
//MARK: From ChildInfo.swift STRUCT
var childInfo = [ChildInfo]()
var basicChildInfo = ["Child's First Name","Child's Middle Name","Child's Last Name"]
override func viewDidLoad() {
super.viewDidLoad()
}
override func numberOfSections(in tableView: UITableView) -> Int {
// #warning Incomplete implementation, return the number of sections
return 1
}
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
// #warning Incomplete implementation, return the number of rows
return basicChildInfo.count
}
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "ChildInfoCell") as! ChildInfoTableViewCell
cell.formLabel.text = basicChildInfo[indexPath.row]
return cell
}
//MARK: Segue to printController
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
let path = self.tableView.indexPathForSelectedRow!
let destViewController = segue.destination as! PrintPageTableViewController
}
//MARK: Cancel Button Pressed
#IBAction func cancelBtnPressed(_ sender: Any) {
dismiss(animated: true, completion: nil)
}
#IBAction func saveBtnPressed(_ sender: Any) {
let firstname = firstNameText.text ?? ""
let middlename = middleNameText.text ?? ""
let lastname = lastNameText.text ?? ""
let formData = ChildInfo(cFirstName: firstname, cMiddleName: middlename, cLastName: lastname)
self.navigationController?.popViewController(animated: true)
formDelegate.saveInfoBlock(form: formData)
saveInfoBLock()
}
func saveInfoBLock() {
print("Saving Info")
dismiss(animated: true, completion: nil)
}
}
Heres my struct that I don't properly use
struct ChildInfo {
var childFirstName: String?
var childMiddleName: String?
var childLastName: String?
var childsMadeUpName: String = ""
init(cFirstName: String, cMiddleName: String, cLastName: String) {
self.childFirstName = cFirstName
self.childMiddleName = cMiddleName
self.childLastName = cLastName
}
}
and lastly my tableviewcell
class ChildInfoTableViewCell: UITableViewCell {
#IBOutlet weak var formText: UITextField!
#IBOutlet weak var formLabel: UILabel!
override func awakeFromNib() {
super.awakeFromNib()
// Initialization code
}
override func setSelected(_ selected: Bool, animated: Bool) {
super.setSelected(selected, animated: animated)
// Configure the view for the selected state
}
}
Once the delegate protocol gets passed. What would a put in the printtableviewcontroller to make the data show? I had someone help me on here, but It was all programmatically and I'm no that advanced yet.
There are several things you can do:
Use delegation. I am assuming this is what you want to achieve here.
Pass your data through Segues. ( Recommended )
To use delegation, you have to have a clear concept of how delegation works.
Here is a link to an explanation I gave someone on another site. It breaks it down, I think this may help you a bit.
https://teamtreehouse.com/community/totally-confused-with-the-example-used
For now, I think the solution to your problem is to use Segues.
When you tap on the button to take you to the ChildInfoTableViewController where you fill the information is where you want to create your "ChildInfo" object. Then when you press save, you trigger the segue and pass the "ChildInfo" object to the "PagesController".
Then from there, that same object should be pass through the segue into the print view.
I am interested in using a tableView to list possible addresses based on inputs in the search bar. After selecting the cell that contains the address desired, the search bar text consists of the address, however I want the possible addresses (cells) to disappear. Does self.searchResultsTableView.reloadData() in didSelectRowAt clear all the cells or is there another command? I am not certain how to clear the cells after selecting the appropriate address without iterating and having the suggestion introduce more cells.
import UIKit
import MapKit
class SearchViewController: UIViewController {
#IBOutlet weak var searchBar: UISearchBar!
var searchCompleter = MKLocalSearchCompleter()
var searchResults = [MKLocalSearchCompletion]()
var searchSource: [String]?
#IBOutlet weak var searchResultsTableView: UITableView!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
searchCompleter.delegate = self
searchBar.delegate = self
}
}
extension SearchViewController: UISearchBarDelegate {
func searchBar(_ searchBar: UISearchBar, textDidChange searchText: String) {
searchCompleter.queryFragment = searchText
}
}
extension SearchViewController: MKLocalSearchCompleterDelegate {
func completerDidUpdateResults(_ completer: MKLocalSearchCompleter) {
searchResults = completer.results
searchResultsTableView.reloadData()
}
func completer(_ completer: MKLocalSearchCompleter, didFailWithError error: Error) {
// handle error
}
}
extension SearchViewController: UITableViewDataSource {
func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return searchResults.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let searchResult = searchResults[indexPath.row]
let cell = UITableViewCell(style: .subtitle, reuseIdentifier: nil)
cell.textLabel?.text = searchResult.title
cell.detailTextLabel?.text = searchResult.subtitle
return cell
}
}
extension SearchViewController: UITableViewDelegate {
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
tableView.deselectRow(at: indexPath, animated: true)
let completion = searchResults[indexPath.row]
let searchRequest = MKLocalSearchRequest(completion: completion)
let search = MKLocalSearch(request: searchRequest)
search.start { (response, error) in
let coordinate = response?.mapItems[0].placemark.coordinate
print(String(describing: coordinate))
print(response?.mapItems)
self.searchBar.text = response?.mapItems[0].name
}
self.searchResultsTableView.reloadData()
}
}
If you want to clear your tableView then you need to make your datasource array empty and then reload the tableView.
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
tableView.deselectRow(at: indexPath, animated: true)
let completion = searchResults[indexPath.row]
let searchRequest = MKLocalSearchRequest(completion: completion)
let search = MKLocalSearch(request: searchRequest)
search.start { (response, error) in
let coordinate = response?.mapItems[0].placemark.coordinate
print(String(describing: coordinate))
print(response?.mapItems)
self.searchBar.text = response?.mapItems[0].name
}
//Make empty your array ant then reload tableView
searchResults = []
self.searchResultsTableView.reloadData()
}