how to pass Values from ViewController to UITableView custom cell class

Question

i have a VC name RestaurantViewController it has custom cell for itemName ItemPrice and there are three button + , - and add their actions are in customCellClass now when a user select the quantity by setting with plus/minus and then hit the add button the whole data should go to the CartVC but not push until user selects the cart icon on main menu.

the RestaurantVC looks like this

currently i'm using the blockClosure to pass data

 //assign item name to cell
    let selectedDictName = restMenu[indexPath.row] as! NSDictionary
    print("the selected dict ", selectedDictName)
    cell.itemNameLabel.text = selectedDictName.value(forKey: "ItemName") as! String

    // assign item price to cell
    let selectedDictPrice = restMenu[indexPath.row] as! NSDictionary
    cell.itemPriceLabel.text = "Price: \(selectedDictPrice.value(forKey: "ItemPrice") as! String)"

    // pass ItemName and ItemPrice by blockClosure
    if blockClosure != nil{
        blockClosure(selectedDictName.value(forKey: "ItemName") as! String, selectedDictPrice.value(forKey: "ItemPrice") as! String )
    }

but this pass all values corresponding the selected restaurant at before loading the cell

how can i pass data and then further attach the item quantity with it? it will be very helpful for my final semester project

Are you familiar with protocols and delegate? Give this a look: https://stackoverflow.com/a/25792213/4427884 — Codetard, May 11 '18 at 05:55
You want pass data from `RestaurantViewController` to custom cell? I think you are already doing by setting `cell.itemNameLabel.text`.. Can you explain your problem little more? — Ankit Jayaswal, May 11 '18 at 05:57
with this cell.itemNameLabel.text the last object value in dictionary is assigned to the closure block not the one whose button is clicked — Gurjit Singh, May 11 '18 at 06:12
Shouldn't the question be 'passing values form custom tableViewCell to ViewController'? — Tejas K, Dec 03 '19 at 07:49

Manish Mahajan · Accepted Answer · 2018-05-11T06:25:43.930

3

Follow Below Code:- Using Protocol Delegate

//1
//Create protocol

protocol TableViewCellDelegate {
    func addTapped(cell: TableViewCell)
}

//2
//Create instance
class TableViewCell: UITableViewCell {

var delegate: TableViewCellDelegate?

….

@IBAction func addAction(_ sender: Any) {
    delegate?.addTapped(cell: self)
}
}


//3

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {

    // create a new cell if needed or reuse an old one
    let cell: TableViewCell = tableView.dequeueReusableCell(withIdentifier: “cell”, for: indexPath) as! TableViewCell
    cell.delegate = self
}

 //4
extension ViewController: TableViewCellDelegate {
func addTapped(cell: TableViewCell) {

 }
}

edited May 11 '18 at 06:25

answered May 11 '18 at 06:02

Manish Mahajan

2,062
1
13
19

Follow these four steps, you will come to how to use protocol and delegate, and you will get idea how to deal with your problem – Manish Mahajan May 11 '18 at 06:27
can i send the data using cell.blockClosure ? for the corresponding cell where the add button pressed to send the data to add button method and further attached to NSDictionary? – Gurjit Singh May 11 '18 at 06:36
When you hit the + - button you can get here 4th step, look above answer... and in addTapped action you can update your dictionary and reload tableview – Manish Mahajan May 11 '18 at 06:43
you need to take + and - button action in tableviewcell and need to take one extra method in Protocol and conform all mehod to View controller – Manish Mahajan May 11 '18 at 06:44
i'll try this and notify you as soon as possible – Gurjit Singh May 11 '18 at 06:44
its working but now how to get the data from corresponding cell like itemName and ItemPrice? – Gurjit Singh May 11 '18 at 06:57
how get the indexPath for the func addTapped(cell: TableViewCell) – Gurjit Singh May 11 '18 at 07:04
let indexPath = self.yourTableview.indexPath(for: cell) To get Indexpath – Manish Mahajan May 11 '18 at 07:09
very helpful @Manish Mahajan Bro – Gurjit Singh May 11 '18 at 07:15

how to pass Values from ViewController to UITableView custom cell class

1 Answers1