UICollecionView inside UITableView. How to handle selections? - ios

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!!