delegate from VC to TableViewCell to update cell

Question

I'm trying to update all my cell from my VC with delegate.

it works from cell to update something on VC, but when I try to update something from VC to make changes on cell, it doesn't work.

In my VC I added :

protocol MainViewDelegate {
    func updateValueInCell()
}

var delegate: MainViewDelegate?

@IBAction func modifyValueAtVC(_ sender: Any) {
    func updateValueInCell()
}

and in my cell

var mainView = ViewController()

extension CustomTableViewCell : MainViewDelegate {
    func updateValueInCell() {
        print("hello")
    }

 override func awakeFromNib() {
        super.awakeFromNib()
        mainView.delegate = self
    }

but nothing happened when I pressed my button from my View Controller.

is it the correct way on update cell from VC or do you guys have any other ideas?

thank you! :)

Answer 1

vc update cell only need reloadData, if u want cell trigger viewcontroller by cell, use delegate.

class MainView:UIViewController,CustomTableViewCellDelegate{
    @IBOutlet weak var table: UITableView!//table.delegate = self
    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    
        let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath) as! DailyScheduleTableViewCell
        cell.delegate = self
        //update what you want
        return cell
    }

    func onClick(cell: CustomTableViewCell) {
        //cell click trigger
    }

    @IBAction func modifyValueAtVC(_ sender: Any) {
        table.reloadData()
    }
}

protocol CustomTableViewCellDelegate{
    func onClick(cell:CustomTableViewCell)
}

class CustomTableViewCell:UITableViewCell{
    var delegate:CustomTableViewCellDelegate!

    @IBAction func onClick(_ sender: Any) {
        del?.onClick(cell: self)
    }

}