UITableView内的UICollecionView。 如何处理选择？

Question

I am making a form with a tableView with multiple kind of cell types. One of these types contains an UICollectionView with buttons to select some answers.

What I need is to be able to hide or show rows in the table, regarding on the answers. For example: when answer to question 2 is "No", question 3 is not showing anymore.

But I don't know how to make that tableview knows what's being selected in one of it's cells

In the cell that contains the UICollectionView I have this method

func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {

    let indexPath = optionsCollectionView.indexPathsForSelectedItems?.first
    let cell = collectionView.cellForItem(at: indexPath!) as! OptionsCollectionViewCell
    let data = cell.itemButton.titleLabel?.text
    selectedItem = data

}

But I don't know how to automatically pass it to the tableview so it knows what rows to show or hide... Any idea?

this is my cellForRowAt

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    if sortedFixedContentType.count != 0 {
        let item = sortedFixedContentType[indexPath.row]

        switch item.typeId {
        case "42":
            let cell = tableView.dequeueReusableCell(withIdentifier: "FormFileCell", for: indexPath) as! FormFileCell
            return cell;
        case "39":
            let cell = tableView.dequeueReusableCell(withIdentifier: "FormExpenseTypeCell", for: indexPath) as! FormExpenseTypeCell


            return cell;
        case "86":
            let cell = tableView.dequeueReusableCell(withIdentifier: "FormExpensePaymentModeCell", for: indexPath) as! FormExpensePaymentModeCell
            return cell;
        case "87":
            let cell = tableView.dequeueReusableCell(withIdentifier: "FormExpenseFileTypeCell", for: indexPath) as! FormExpenseFileTypeCell

            return cell;
        case "88":
            let cell = tableView.dequeueReusableCell(withIdentifier: "FormProviderCell", for: indexPath) as! FormProviderCell
            return cell;
        default:
            let cell = tableView.dequeueReusableCell(withIdentifier: reuseIdentifier, for: indexPath) as! BaseFormCell
            cell.idLabel.text = item.htmlType
            return cell
        }
    }
    else {
        let cell = tableView.dequeueReusableCell(withIdentifier: reuseIdentifier, for: indexPath) as! BaseFormCell
        cell.idLabel.text = ""
        return cell
    }
}

Thanks

Answer 1

There are Four steps to do this :-

1.First create a protocol lets say 'CustomCellDelegate' in your custom cell where you are using collectionview inside and create a variable that will hold the custom delegate just to give a example suppose your cell name is CustomCell create a CustomCellDelegate and declare it as customDelegate

protocol CustomCellDelegate : class {
    func Method1()
}

class CustomCell : UITableViewCell {
    var customDelegate : CustomCellDelegate?
}

2.Then you need to fire that delegate from CustomCell class collectionview delegate method didSelectItemAt like this

extension CustomCell : UICollectionViewDelegate {
    func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
        if let delegate = customDelegate {
            delegate.Method1()
        }
    }
}

3.Third assign the customDelegate to the view controller where you want to get the delegate for example myViewController here

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCell(withIdentifier: "customeCellIdentifier", for: indexPath) as! CustomCell
    cell.customDelegate = self // myViewController
    return cell
}

4.Handle the delegate in your view controller like this

extension myViewController : CustomCellDelegate {
    func Method1() {
        print("Method 1 called")
    }
}

I Hope this will solve your problem let me know if you find this answer helpful. Cheers!!