Trying to crate a simple tableView that show data but it's not working. I checked and it's not even get into func tableView .. Any ideas what can be the problem?
import UIKit
class ViewController: UIViewController,UITableViewDelegate , UITableViewDataSource , UITextFieldDelegate {
let messageArray = ["First message ", "sec message " , "Third message"]
#IBOutlet weak var customTableView: UITableView!
override func viewDidLoad() {
super.viewDidLoad()
customTableView.delegate = self
customTableView.dataSource = self
customTableView.register(UINib(nibName: "customCell" , bundle: nil), forCellReuseIdentifier: "tableCell")
configureTableView()
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "tableCell"
, for: indexPath)as! custom
cell.label0.text = messageArray[0]
cell.label1.text = messageArray[1]
cell.label2.text = messageArray[2]
cell.label3.text = "d"
customTableView.reloadData()
return cell
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return 3
}
func configureTableView() {
customTableView.rowHeight = UITableViewAutomaticDimension
customTableView.estimatedRowHeight = 120.0
}
}
Try deleting the reload data from cellForRowAt and implementing
func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
return UITableViewAutomaticDimension
}
I think you have a recursive reload becuase you have this in cellForRowAt
customTableView.reloadData()
so comment it and try
Register cell before set delegate and data source.
Remove customTableView.reloadData() in func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell
Simply remove this line: customTableView.reloadData() from datasource method cellForRowAt.
You are basically asking the tableview to reload all of it's data while it is getting the first row from the datasource method. So it's an endless loop. It never gets to show any data.
Related
I have this code:
class UserProfilViewController: UIViewController {
// Outlets
#IBOutlet weak var userProfileTableView: UITableView!
override func viewDidLoad() {
super.viewDidLoad()
}
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
self.tabBarController?.navigationItem.title = "Profil"
}
}
// MARK: - Table View Data Source
extension UserProfilViewController {
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return 1
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "UserProfilCell", for: indexPath)
return cell
}
}
My project in bitbucket: https://bitbucket.org/trifek/karta-nauka/src/master/
I placed one tableviewcell cell on the tableview (UserProfil.storyboard). I have a form on it that I would like to display in this cell. The problem is the cell does not display. Does anyone know how to fix it?
As per the code you have shared, Please change your code to following.
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "UserProfilCell", for: indexPath) as! UserProfilTableViewCell
return cell
}
Let me know in case of any queries.
IMHO, first try to clear your requirements. If you want to display fix number of cells then you can simply use static cells. If your cells are dynamic i.e their number depends on some calculation or other logic, then you can use dynamic cell. While using dynamic cell, verify if you have registered it or not (if you are using xib for cell) and also verify for the cell identifier.
#Lukasz
Please use the below code for this.
class UserProfileViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
setUIComponents()
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
private func setUIComponents(){
registerNibs()
}
}
extension UserProfileViewController: UITableViewDelegate, UITableViewDataSource{
internal func registerNibs(){
tableView.register(UINib(nibName: String(describing: UserProfileTableCell.self), bundle: Bundle.main), forCellReuseIdentifier: kUserProfileCellReuseId)
}
//MARK: TableView Methods -
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return 5
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let sessionCell: UserProfileTableCell.self = tableView.dequeueReusableCell(withIdentifier: kUserProfileCellReuseId, for: indexPath) as! UserProfileTableCell.self
cell.titleLabel.text = “TEST”
return sessionCell
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
tableView.deselectRow(at: indexPath, animated: true)
}
}
class UserProfileTableCell: UITableViewCell {
//Set the "kUserProfileCellReuseId" in nib to register identifier.
let kUserProfileCellReuseId = "kUserProfileCellReuseId"
//MARK: - Override Methods
override func awakeFromNib() {
super.awakeFromNib()
// Initialization code
setUIComponents()
}
private func setUIComponents(){
}
}
You never declare that your view controller conforms to the UITableViewDataSource or UITableViewDelegate protocols. Given that you don't do that, you would not be able to set your view controller as the data source or delegate of your table view.
I'm trying to get an input when the user taps on a cell of a UITableView. That's my code:
import UIKit
class TableView: UIViewController, UITableViewDataSource {
public var data = Array<Array<String>>()
func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return data.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "cellIdentifier")!
cell.textLabel?.text = data[indexPath.row][0]
cell.detailTextLabel?.text = data[indexPath.row][1]
return cell
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
print("TEST")
}
}
And in ViewController I have:
...
let tvClass = TableView()
override func viewDidLoad() {
super.viewDidLoad()
tvClass.data = [["title", "name"]]
self.tableView.dataSource = tv
self.tableView.alwaysBounceVertical = false
}
...
Why am I not getting "TEST" when I click on a cell?
didSelectRowAt is a method inside UITableViewDelegate so , set table delegate like this in viewDidLoad
self.tableView.delegate = self;
and change class declaration like this
class TableView: UIViewController, UITableViewDataSource , UITableViewDelegate {
The Only missing thing is
TableViewDelegate.
As delegate tells iOS sdk to know that action is being performed.
self.tableView.delegate = self
I’m trying to put a tableView inside a collectionView sectionHeader. I tried adding a tableView to the header in storyboard and then setting its class to tableViewController.swift but that didn’t work.
(I’m using swift)
After trying a bit i did manage to get it working properly.
First i created a header as normal, then created an IBOutlet of the tableView.
Then I simply setup the header file like a tableViewController is setup, connected to the dataSource and delegate in awakeFromNib and done.
class HomeHeader: UICollectionReusableView, UITableViewDataSource, UITableViewDelegate {
#IBOutlet weak var tableView: UITableView!
override func awakeFromNib() {
tableView.delegate = self
tableView.dataSource = self
//tableView.backgroundColor = UIColor.clear
}
func numberOfSections(in tableView: UITableView) -> Int {
return 1 //number of sections
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return 5 //number of cells
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath) as UITableViewCell
cell.textLabel?.text = "test"
// cell.backgroundColor = UIColor.clear
return cell
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
}
}
I've made an app using a table view to persist data. The table view shows the elements of an array which is saved through UserDefaults. Since TableViewControllers look kind of ugly, I did it a bit different: I put a TableView into a normal ViewController.
My problem is: even though I did everything I could to get the TableView to show the data, it doesn't, and I don't know why. Could anyone help me?
Here's the code of the ViewController:
class ErfolgreicheChallenges: UIViewController, UITableViewDelegate, UITableViewDataSource {
#IBOutlet var myTableView: UITableView!
var data = [String]()
override func viewDidLoad() {
super.viewDidLoad()
myTableView.delegate = self
data.append("test")
data.append("lol")
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return 10
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
myTableView.dataSource = self
let cell = myTableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath)
cell.textLabel!.text = data[indexPath.row]
return cell
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
}
}
Thanks to everyone for having a look! Have a great day
Replace viewDidLoad with
override func viewDidLoad() {
super.viewDidLoad()
myTableView.dataSource = self
myTableView.delegate = self
data.append("test")
data.append("lol")
myTableView.reloadData()
}
and replace numberOfRowsInSection with
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return data.count
}
and delete myTableView.dataSource = self in cellForRow.
If the code is crashing then myTableView is not connected in IB.
As mentioned in the comments, consider to use UITableViewController which got a table view instance with pre-connected data source and delegate.
You need to set the data source and data delegate in viewDidLoad, or somewhere similar.
You are setting the datasource inside cellForRowAt, but that will never be called!
I am wondering why is my tableview not populating? I have a tableview inside my view controller and I have tried to follow the guide however, nothing seems to show up on my tableview.
here's my code
#IBOutlet weak var weatherTableView: UITableView!
var items: [String] = ["Sunny", "Cloudy", "Rainy"]
override func viewDidLoad() {
super.viewDidLoad()
self.weatherTableView.register(UITableViewCell.self, forCellReuseIdentifier: "WeatherCell")
// Do any additional setup after loading the view.
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return items.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell:UITableViewCell = self.weatherTableView.dequeueReusableCell(withIdentifier: "WeatherCell")! as UITableViewCell
cell.textLabel?.text = self.items[indexPath.row]
return cell
}
am I missing something here?
Thanks for your help in advance
Make sure you are assigning tableview delegate and datasource throw storyboard or add below line into your viewDidLoad() of your viewcontroller (UITableViewDelegate, UITableViewDataSource)
weatherTableView.delegate = self;
weatherTableView.dataSource = self