How to update a UILabel with UIButton in custom cell in Swift? - uitableview

Question

I'm trying to implement a counter as a UILabel using + and - UIButtons in a custom cell. I've managed to reference the row using addTarget and tags for the buttons, however I'm not sure how to update the label, adding or subtracting 1 each time a button is pressed.
I've tried accessing the cell.drinkQtyLabel.text directly from the addDrink function but that clearly doesn't work. My research pointed to using delegates, but I'm not proficient enough with Xcode to know what to do with that info.
Here is a screen shot of the cells:
Here is the custom cell.swift:
import UIKit
class ProductListTableViewCell: UITableViewCell {
#IBOutlet var drinkNameLabel: UILabel! = UILabel()
#IBOutlet var drinkVesselLabel: UILabel! = UILabel()
#IBOutlet var drinkSizeLabel: UILabel! = UILabel()
#IBOutlet var drinkPriceLabel: UILabel! = UILabel()
#IBOutlet var drinkQtyLabel: UILabel! = UILabel()
#IBOutlet weak var subtractDrinkButton: UIButton! = UIButton()
#IBOutlet weak var addDrinkButton: UIButton! = UIButton()
required init(coder aDecoder: NSCoder){
super.init(coder: aDecoder)
}
override init(style: UITableViewCellStyle, reuseIdentifier: String?){
super.init(style: style, reuseIdentifier: reuseIdentifier)
}
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
}
}
and the cellForRowAtIndex method:
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell:ProductListTableViewCell = tableView.dequeueReusableCellWithIdentifier("Cell", forIndexPath: indexPath) as ProductListTableViewCell
let drink:PFObject = self.productListData.objectAtIndex(indexPath.row) as PFObject
var Qty = 1
cell.drinkNameLabel.alpha = 0
cell.drinkVesselLabel.alpha = 0
cell.drinkSizeLabel.alpha = 0
cell.drinkPriceLabel.alpha = 0
cell.drinkQtyLabel.alpha = 0
cell.drinkNameLabel.text = drink.objectForKey("name") as? NSString
cell.drinkVesselLabel.text = drink.objectForKey("vessel") as? NSString
cell.drinkSizeLabel.text = drink.objectForKey("size") as? NSString
cell.drinkPriceLabel.text = drink.objectForKey("price") as? NSString
cell.drinkQtyLabel.text = String(Qty)
UIView.animateWithDuration(0.5, animations: {
cell.drinkNameLabel.alpha = 1
cell.drinkVesselLabel.alpha = 1
cell.drinkSizeLabel.alpha = 1
cell.drinkPriceLabel.alpha = 1
cell.drinkQtyLabel.alpha = 1
})
cell.addDrinkButton.tag = indexPath.row
cell.drinkQtyLabel.tag = indexPath.row
cell.addDrinkButton.addTarget(self, action: Selector("addDrink:"), forControlEvents: UIControlEvents.TouchUpInside)
return cell
}
func addDrink(sender:UIButton){
println("Added drink in row \(sender.tag)"
//update cell.drinkQtyLabel.text
}
}
Pseudo code of what I want might look something like:
func addDrink(sender: UIButton){
for cell at indexPath(sender.tag){
cell.drinkQtyLabel.text = int(cell.drinkQtyLabel.text) + 1
}
}
But I know this isn't a solution!