How to add additional textfields by clicking button in table view - swift

Question

I am trying to add an option to add additional student fields inside table so that user can add more than one student name.
But I am confused how to do it using table view.
I am not interested in hiding view with specific number of fields.
class ViewController: UIViewController,UITableViewDelegate,UITableViewDataSource {
struct listItems{
var title : String
var isExpandable:Bool
var maxFields :Int
init(title:String,isExp:Bool,mxF:Int) {
self.title = title
self.isExpandable = isExp
self.maxFields = mxF
}
}
#IBOutlet weak var tblListTable: UITableView!
let data : [listItems] = [listItems(title: "Name", isExp: false, mxF: 1), listItems(title: "Student Name", isExp: true, mxF: 20), listItems(title: "Email", isExp: false, mxF: 1)]
override func viewDidLoad() {
super.viewDidLoad()
tblListTable.delegate = self
tblListTable.dataSource = self
self.tblListTable.reloadData()
print("isLoaded")
}
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 {
print("cellForRow")
let cell = tableView.dequeueReusableCell(withIdentifier: "cell") as! ListCell
cell.lblName.text = data[indexPath.row].title
if data[indexPath.row].isExpandable == true {
cell.btnAddField.isHidden = false
print("ishidden")
}
else {
cell.btnAddField.isHidden = true
}
return cell
}
}
List Cell Class
import UIKit
protocol AddFieldDelegate : class {
func addField( _ tag : Int)
}
class ListCell: UITableViewCell {
#IBOutlet weak var btnAddField: UIButton!
#IBOutlet weak var lblName: UILabel!
#IBOutlet weak var txtField: UITextField!
override func awakeFromNib() {
super.awakeFromNib()
// Initialization code
}
override func setSelected(_ selected: Bool, animated: Bool) {
super.setSelected(selected, animated: animated)
}
func addField( _ tag : Int){
}
}

Answer 1

You are on the right track creating the AddFieldDelegate. However, rather than implementing the method inside the ListCell class you need to implement it in the ViewController.
First, change the view controller class definition line to:
class ViewController: UIViewController,UITableViewDelegate,UITableViewDataSource, AddFieldDelegate {
This will allow you to call the delegate method from the view controller. Next, when you are creating your table view cells add the line:
cell.delegate = self
After that, move the method definition of the method addField to the view controller.
So inside of your view controller add:
func addField(titleOfTextFieldToAdd: String, numberAssociatedWithTextFieldToAdd: Int) {
data.append(listItems(title: titleOfTextFieldToAdd, isExp: false, mxF: numberAssociatedWithTextFieldToAdd))
self.tableView.reloadData()
}
I used an example definition of the addField method but you can change it to anything that you would like, just make sure that you change the data array and reload the table view data.
Lastly, we must define the delegate in the ListCell class. So add this line to the ListCell class:
weak var delegate: MyCustomCellDelegate?
You can then add the text field by running the following anywhere in your ListCell class:
delegate?.addField(titleOfTextFieldToAdd: "a name", numberAssociatedWithTextFieldToAdd: 50)
For more information on delegation, look at the answer to this question.

Answer 2

You have to append another item in your data array on button click and reload the tableview.