So I'm making a new custom view controller class programmatically that has a table view in it. I'm trying to assign this table view with a custom cell class that I made.
class AllTasksViewController: UIViewController, UITableViewDelegate, UITableViewDataSource{
let tableview = UITableView()
// Number of Rows
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return coreTasks.count
}
// Cell Data and Configuration
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let task = coreTasks[indexPath.row]
let cell = tableView.dequeueReusableCell(withIdentifier: "taskCell") as! CustomCell // Thread 1: Fatal error: Unexpectedly found nil while unwrapping an Optional value
I'm getting a nil value I think it's because I need to specify which tableView has an identifier "taskCell" in the storyboard. how do I do that?
here is the custom cell Class
class CustomCell: UITableViewCell {
#IBOutlet var taskLabel: UILabel!
#IBOutlet var dateLabel: UILabel!
// #IBOutlet var iconsCell: UIImageView!
func setTask(task: NSManagedObject ){
taskLabel.text = task.value(forKey: "name") as? String // this is giving me nil value
dateLabel.text = task.value(forKey: "date") as? String
}
You have to register your tableViewCell class for this table view to be able to use it. Do it in viewDidLoad or any time before the first data load to the tableView
class AllTasksViewController: UIViewController, UITableViewDelegate, UITableViewDataSource{
let tableview = UITableView()
func viewDidLoad() {
super.viewDidLoad()
tableView.dataSource = self
tableView.delegate = self
self.view.addSubView(tableView)
tableView.register(CustomCell.self, forCellReuseIdentifier:"taskCell")
tableView.reloadData()
}
// Number of Rows
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return coreTasks.count
}
// Cell Data and Configuration
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let task = coreTasks[indexPath.row]
let cell = tableView.dequeueReusableCell(withIdentifier: "taskCell") as! CustomCell
Related
I would like to show table view with cell where will be one label and tableview below this label. I have such layout right now:
view above my tables view will be hidden in some conditions so as a result I will have table view on whole screen. So... I found this video where developer managed to solve my task. I did everything similarly to his video but I didn't manage to show table view inside table view cell. Here is my steps:
Added all views to general view.
Attached tags to my table views: 100 for main table view and 90 for inside table view.
Created cell classes and attached them to both cells.
Added extension at main cell like in video.
Handled table view tag in main view controller.
As I see the problem is with inside table view which can't be shown. Below you can see classes for cells. Main cell:
class GeneralCell : UITableViewCell {
#IBOutlet weak var answerOptions: UITableView!
#IBOutlet weak var questionText: UILabel!
}
extension GeneralCell{
func setTableViewDataSourceDelegate <D:UITableViewDelegate & UITableViewDataSource> (_ dataSourceDelegate: D, forRow row: Int)
{
answerOptions.delegate = dataSourceDelegate
answerOptions.dataSource = dataSourceDelegate
answerOptions.reloadData()
}
}
inside cell:
class AnswersCell: UITableViewCell {
#IBOutlet weak var answerOption: UILabel!
}
and here is my view controller:
class PollsController: UIViewController, UITableViewDataSource,UITableViewDelegate {
#IBOutlet weak var questionTableView: UITableView!
override func viewDidLoad() {
super.viewDidLoad()
questionTableView.delegate = self
questionTableView.dataSource = self
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return 1
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
print(tableView.tag)
if tableView.tag == 100 {
let cell: GeneralCell = tableView.dequeueReusableCell(withIdentifier: "GeneralCell") as! GeneralCell
cell.answerOptions.reloadData()
return cell
}else{
let cell: AnswersCell = tableView.dequeueReusableCell(withIdentifier: "AnswersCell") as! AnswersCell
return cell
}
}
func numberOfSections(in tableView: UITableView) -> Int {
if tableView.tag == 100 {
return 1
}else{
return 6
}
}
}
Then I did some test for getting to know where the problem is. I added print() into data loader function:
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
print(tableView.tag)
if tableView.tag == 100 {
print("1")
let cell: GeneralCell = tableView.dequeueReusableCell(withIdentifier: "GeneralCell") as! GeneralCell
cell.answerOptions.reloadData()
return cell
}else{
print("2")
let cell: AnswersCell = tableView.dequeueReusableCell(withIdentifier: "AnswersCell") as! AnswersCell
return cell
}
}
and in the output I saw only one tag:
100
and as I see inside table view can't be loaded but I can't understand why. Maybe someone of you will find problem or mistake?
I suggest you use only one tableview, here some example
struct Answer {
let answerText: String
}
struct Question {
let questionText: String
let answers: [Answer]
}
class ViewController: UIViewController {
#IBOutlet weak var tableView: UITableView!
var questions: [Question] = []
override func viewDidLoad() {
super.viewDidLoad()
for i in 1...10 {
let question = Question(questionText: "Question \(i)", answers: [
Answer(answerText: "Answer 1 Question \(i)"),
Answer(answerText: "Answer 2 Question \(i)"),
Answer(answerText: "Answer 3 Question \(i)"),
Answer(answerText: "Answer 4 Question \(i)")
])
questions.append(question)
}
tableView.dataSource = self
tableView.delegate = self
tableView.sectionHeaderHeight = UITableView.automaticDimension;
tableView.estimatedSectionHeaderHeight = 44
}
}
extension ViewController: UITableViewDataSource, UITableViewDelegate {
func numberOfSections(in tableView: UITableView) -> Int {
return questions.count
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return questions[section].answers.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "AnswerCell", for: indexPath) as! AnswerCell
cell.answerLabel.text = questions[indexPath.section].answers[indexPath.row].answerText
return cell
}
func tableView(_ tableView: UITableView, viewForHeaderInSection section: Int) -> UIView? {
let cell = tableView.dequeueReusableCell(withIdentifier: "QuestionCell") as! QuestionCell
cell.questionLabel.text = questions[section].questionText
return cell
}
}
Try this
class GeneralCell : UITableViewCell {
#IBOutlet weak var answerOptions: UITableView!
#IBOutlet weak var questionText: UILabel!
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
print(tableView.tag)
if tableView == questionTableView{
let cell: GeneralCell = tableView.dequeueReusableCell(withIdentifier: "GeneralCell") as! GeneralCell
cell.answerOptions.delegate = self
cell.answerOptions.dataSource = self
cell.answerOptions.reloadData()
return cell
}else{
let cell: AnswersCell = tableView.dequeueReusableCell(withIdentifier: "AnswersCell") as! AnswersCell
return cell
}
}
import UIKit
class ViewController: UIViewController, UITableViewDelegate, UITableViewDataSource {
#IBOutlet var myTableView: UITableView!{
didSet {
tableView.dataSource = self
//tableView.reloadData()
}
}
var data = [String]()
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
data = ["data1","data2", "data3"]
//tableView.reloadData()
}
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("myCell", forIndexPath: indexPath) as UITableViewCell
cell.lbl?.text = data[indexPath.row]
return cell
}
}
you need to set delegate and you have not used code properly.
#IBOutlet var myTableView: UITableView!
var data:[String]!{
didSet {
tableView.reloadData()
}
}
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
tableView.dataSource = self
tableView.delegate = self
data = ["data1","data2", "data3"]
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return data.count
}
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("myCell", forIndexPath: indexPath) as UITableViewCell
cell.lbl?.text = data[indexPath.row]
return cell
}
}
Note: if your cell is a nib file then register your cell in viewDidLoad before setting delegate=self
tableView.register(UINib(nibName: "nibname", bundle: nil), forCellReuseIdentifier: "myCell")
To get you going, this is all the code you need:
class MyCell: UITableViewCell {
#IBOutlet var lbl: UILabel!
}
class ViewController: UIViewController, UITableViewDelegate, UITableViewDataSource {
#IBOutlet var myTableView: UITableView!
var data = [String]()
override func viewDidLoad() {
super.viewDidLoad()
data = ["data1","data2", "data3"]
// set the table view's dataSource
myTableView.dataSource = self
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return data.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "myCell", for: indexPath) as! MyCell
cell.lbl?.text = data[indexPath.row]
return cell
}
}
This assumes that you
created a cell prototype in Storyboard
assigned its Custom Class to MyCell
gave it an identifier of "myCell"
added a label to it and connected it to #IBOutlet var lbl: UILabel!
Move
tableView.dataSource = self
to ViewDidLoad()
And add
tableView.delegate = self
Below dataSource
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return data.count
}
There are two views in my project: in the first one users input two words and those words are saved in a dictionary as the key and the value. The code in short:
var words = [Dictionary<String, String>]()//<-declared outside the class
words.append([input.text: input2.text] as! [String : String])
Then in the second view, I want to display all the saved words in table cell like so:
And I have found some code for doing that, but it works only for a local dict:
class TableViewController: UIViewController, UITableViewDelegate, UITableViewDataSource {
// Data model: These strings will be the data for the table view cells
let animals: [String] = ["Horse", "Cow", "Camel", "Sheep", "Goat"]
// cell reuse id (cells that scroll out of view can be reused)
let cellReuseIdentifier = "cell"
// don't forget to hook this up from the storyboard
#IBOutlet var tableView: UITableView!
override func viewDidLoad() {
super.viewDidLoad()
// Register the table view cell class and its reuse id
self.tableView.register(UITableViewCell.self, forCellReuseIdentifier: cellReuseIdentifier)
// (optional) include this line if you want to remove the extra empty cell divider lines
// self.tableView.tableFooterView = UIView()
// This view controller itself will provide the delegate methods and row data for the table view.
tableView.delegate = self
tableView.dataSource = self
}
// number of rows in table view
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return self.animals.count
}
// create a cell for each table view row
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
// create a new cell if needed or reuse an old one
let cell:UITableViewCell = self.tableView.dequeueReusableCell(withIdentifier: cellReuseIdentifier) as UITableViewCell!
// set the text from the data model
cell.textLabel?.text = self.animals[indexPath.row]
return cell
}
// method to run when table view cell is tapped
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
print("You tapped cell number \(indexPath.row).")
}
}
I have edited the code above like so:
var wordIndex1 = words.count - 1
class TableViewController: UIViewController, UITableViewDelegate, UITableViewDataSource {
var word = words[wordIndex1] as? Dictionary<String, String>
let cellReuseIdentifier = "cell"
#IBOutlet var tableView: UITableView!
override func viewDidLoad() {
super.viewDidLoad()
self.tableView.register(UITableViewCell.self, forCellReuseIdentifier: cellReuseIdentifier)
tableView.delegate = self
tableView.dataSource = self
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return (self.word?.count)!
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell:UITableViewCell = self.tableView.dequeueReusableCell(withIdentifier: cellReuseIdentifier) as UITableViewCell!
cell.textLabel?.text = self.word?.keys.first
return cell
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
print("You tapped cell number \(indexPath.row).")
}
}
But it only displays the last added value whereas in the first code it creates a new cell for each new value.
What did I do wrong?
You access array index = number of items you need
var wordIndex1 = words.count - 1
or in short
if let lastWord = words.last {
////
}
note array indexing starts with 0 and to numberOfElemnts - 1
Also it's better to have a model
struct Item {
let leftInp.rightInp:String
}
then create the array like
var arr = [Item]()
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return words.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell:UITableViewCell = self.tableView.dequeueReusableCell(withIdentifier: cellReuseIdentifier) as UITableViewCell!
let dic = words[indexPath.row]
cell.textLabel?.text = dic.keys.first
return cell
}
I have created a tableView with two different labels and one textfield. Depending on the indexPath in which is selected the labels will display different text according to the array. I have created a CocoTouch Class file and made it type TableViewCell.
TableViewCell.swift
import UIKit
class Driver_Navigation_TableViewCell: UITableViewCell {
#IBOutlet weak var orderTextField: UITextField!
#IBOutlet weak var adressLabel: UILabel!
#IBOutlet weak var nameLabel: 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
}
}
ViewController.swift
class ViewController: UIViewController, MGLMapViewDelegate, UITableViewDataSource, UITableViewDelegate, UITextFieldDelegate {
var allCellsText = [String]()
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
array.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath) as! Driver_Navigation_TableViewCell
cell.adressLabel.text = passengersAdress[indexPath.row]
cell.nameLabel.text = passengersName[indexPath.row]
cell.orderTextField.placeholder = "\(indexPath.row + 1)."
return(cell)
}
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath as IndexPath) as! Driver_Navigation_TableViewCell
cell.orderTextField.tag = indexPath.row
cell.orderTextField.delegate = self // theField is your IBOutlet UITextfield in your custom cell
return cell
}
func textFieldDidEndEditing(textField: UITextField) {
allCellsText.append(textField.text!)
print(allCellsText)
}
}
You cant have duplicate UITableViewDataSource and UITableViewDelegate methods it won't work like that.
Also in your code you have not set the delegate for the textField in both the cellForRowAtIndexPath() methods.
If you want to have two table view in a single controller try the following
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return array.count
}
func tableView(_ tableView: UITableView, cellForRowAtIndexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath) as! Driver_Navigation_TableViewCell
if tableView == self.tableView1 {
cell.adressLabel.text = passengersAdress[indexPath.row]
cell.nameLabel.text = passengersName[indexPath.row]
cell.orderTextField.placeholder = "\(indexPath.row + 1)."
}
else {
cell.orderTextField.tag = indexPath.row
}
cell.orderTextField.delegate = self
return(cell)
}
Create outlets for the Table View
I added cell to my tableView and i want to show image in any cell i added an array of image to my class "MathViewController" and i want show these images in per cell.but no image show in any of cell.Do any one know about my problem? I'm very new to swift if you help me it will be great.
its my class MathTableViewCell to get the image from story board:
import UIKit
class MathTableViewCell: UITableViewCell{
#IBOutlet weak var imageCell: UIImageView!
}
and here is the class MathViewController:
import UIKit
class MathViewController: UIViewController, UITableViewDelegate, UITableViewDataSource {
#IBOutlet weak var tableController: UITableView!
let items = ["Calculatorimg" , "ss"]
override func viewDidLoad() {
super.viewDidLoad()
self.tableController.register(UITableViewCell.self, forCellReuseIdentifier: "MathTableViewCell")
tableController.rowHeight = UITableViewAutomaticDimension
tableController.estimatedRowHeight = 44
tableController.delegate = self
tableController.dataSource = self
}
func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return items.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
if let cell = tableView.dequeueReusableCell(withIdentifier: "MathTableViewCell", for: indexPath) as? MathTableViewCell{
cell.imageCell.image = UIImage(named: items[indexPath.row])
return cell
}
return UITableViewCell()
}
}
and here is my storyboard as you cell identifier has been set to MathTableViewCell:
storyboard
Part 1: If create new Xib for cell.
Whole code is correct but forgot to register UITableViewCell Nib file into tableView.
Add below code in ViewDidLoad
tableController.register(UINib(nibName: "MathTableViewCell", bundle: nil), forCellReuseIdentifier: "MathTableViewCell")
Part 2: Cross Verify CellReuseIdentifier is correct.