plus or minus button values is not updated in swift - ios

Question

I working on cart view controller I tried some of code, it's show like below image.
values updating every row in tableview, if I click on product1 plusbutton count is increase showing 1 .when I click on product2 plusbutton value is showing 2.count is increasing.minus every time minusbutton also working same like that.
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "CustomTableViewCell") as! CustomTableViewCell
cell.minusButton.tag = indexPath.row
cell.plusbutton.tag = indexPath.row
cell.minusButton.addTarget(self, action: #selector(minusbuttonClick), for: .touchUpInside)
cell.plusbutton.addTarget(self, action: #selector(plusButtonClick), for: .touchUpInside)
return cell
}
#objc func minusbuttonClick(sender : UIButton)
{
let cell = Tableview.cellForRow(at: NSIndexPath(row: sender.tag, section: 0) as IndexPath) as! CustomTableViewCell
if(count > 0){
count -= 1
}
let myString = String(count)
cell.countLabel.text = myString
if count == 0{
cell.countLabel.text = ""
}
self.Tableview.reloadData()
}
#objc func plusButtonClick(sender : UIButton)
{
let cell = Tableview.cellForRow(at: NSIndexPath(row: sender.tag, section: 0) as IndexPath) as! CustomTableViewCell
count += 1
let myString = String(count)
cell.countLabel.text = myString
self.Tableview.reloadData()
}
I have to show when I click product1 value should be 1, if I click on product2 value as 1
minus also decrease same like that

Answer 1

first thing to do is create a struct to hold your data
struct ProductData {
var count : Int
var name : String
}
and you can use that in your ViewController
var productData : [ProductData] = []
the, of course, you need to add some data - here's a simple set to get started
override func viewDidLoad() {
super.viewDidLoad()
// set up some data.
productData.append(ProductData(count: 0, name: "product 1"))
productData.append(ProductData(count: 0, name: "product 2"))
productData.append(ProductData(count: 0, name: "product 3"))
productData.append(ProductData(count: 0, name: "product 4"))
}
using the delegate model described earlier swift: how to get the indexpath.row when a button in a cell is tapped? update your custom table view cell
protocol TableViewCellCustomDelegate: class {
func buttonTapped(index : Int, delta : Int)
}
class TableViewCellCustom: UITableViewCell {
weak var delegate: TableViewCellCustomDelegate?
#IBOutlet weak var minusButton: UIButton!
#IBOutlet weak var plusButton: UIButton!
#IBOutlet weak var countLabel: UILabel!
#IBOutlet weak var productLabel: UILabel!
override func prepareForReuse() {
super.prepareForReuse()
self.delegate = nil
}
#IBAction func minusButtonClick(_ sender: UIButton) {
delegate?.buttonTapped(index: sender.tag, delta : -1)
}
#IBAction func plusButtonClick(_ sender: UIButton) {
delegate?.buttonTapped(index: sender.tag,delta : +1)
}
}
update the delegate methods in your view controller. I've done it here with a single method to add or delete, but you could split it out if you want to do other things as well.
extension ViewController: TableViewCellCustomDelegate {
func buttonTapped(index: Int, delta : Int)
{
productData[index].count += delta
if productData[index].count < 0
{
productData[index].count = 0
}
tableView.reloadRows(at: [IndexPath(row: index, section: 0)], with: .automatic)
}
}
and update your cellForRowAt definition
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "CustomTableViewCell", for: indexPath) as! TableViewCellCustom
cell.countLabel.text = "\(productData[indexPath.row].count)"
cell.productLabel.text = productData[indexPath.row].name
cell.minusButton.tag = indexPath.row
cell.plusButton.tag = indexPath.row
cell.delegate = self
return cell
}