Swift: How do you pass data to a button from tableview cell?

Question

I am trying to pass tableview cell data on editing did end to a button. I have been using tags but I keep getting an error nil found. I think this is do to the amount of rows I have (over 500). Anyone know the best way to do this?

The Code below is what I use (tags). It only crashes (returns nil) when I have multiple tableviewcell rows and have to scroll off the page.

func numberOfSections(in tableView: UITableView) -> Int { return 1 }
        
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int { return inventoryArray.count }

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

let code : String = (inventoryArray[indexPath.row] as AnyObject).value(forKey: "code") as! String
    
let name : String = (inventoryArray[indexPath.row] as AnyObject).value(forKey: "name") as! String

let cell = tableView.dequeueReusableCell(withIdentifier: "Cell", for: indexPath) as! InventoryCell


cell.unitField.tag = indexPath.row

cell.unitField.addTarget(self, action: #selector(Inventory.submit(_:)), for: UIControl.Event.editingDidEnd)


return cell as InventoryCell
  
}

...

@IBAction func submit(_ sender: UIButton) {

let tag = sender.tag

let cell = tableView.cellForRow(at: IndexPath.init(row: tag, section: 0)) as! InventoryCell

var unitCount = Int(cell.unitField.text!)!

cell.count.text = String (unitCount)

}

Instead of using tag you can try this to manage button action: https://stackoverflow.com/questions/28894765/uibutton-action-in-table-view-cell — Faysal Ahmed, Sep 01 '20 at 05:47
Try to avoid force casts at first and handle it with quards or if statements. Maybe somewhere the text is nil. In which line do you have a crush? — Alexander Nikolaychuk, Sep 01 '20 at 06:02
Also it is now clear. Did you have 2 tableViews? Because in one example you used InventoryCell in another InventoryCell01 ? Let us clear how it works — Alexander Nikolaychuk, Sep 01 '20 at 06:03
Alexander Nikolaychuck - Crash is at let cell = tableView.cellForRow(at: IndexPath.init(row: tag, section: 0)) as! InventoryCell — BTR199234, Sep 01 '20 at 06:18
Sometimes the field doesn't crash until after I scroll it off the page then scroll back. — BTR199234, Sep 01 '20 at 06:19

Swift: How do you pass data to a button from tableview cell?

0 Answers0