How to identify which UITextField is being modified inside a UICollectionView Cell?

Question

I have a some UITextFields inside a UICollectionViewCell and I want to know which of them is being modified. Every element has been made programmatically. The UICollectionViewCell has a swift class. The cell is repeated inside the UICollectionView about 5 times so I need to also in which cell the UITextField is.

Any suggestion about it?

Answer 1

First, in cellForItemAt, you need to assign a tag to the textView that will be displayed in that cell. It's easiest to identify it with the row number of the cell. For example:

func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
    cell.textView.tag = indexPath.row
}

Next, inside textViewDidChange you put in a switch statement corresponding with the tag of the textView being modified. Inside each case you can perform whatever code you need knowing which textView you are modifying. For example:

func textViewDidChange(_ textView: UITextView) {
    switch textView.tag {
    case 0:
        // Code for first text view
        break
    case 1:
        // Code for second text view
        break
    case 2:
        // Code for third text view
        break
    case 3:
        // Code for fourth text view
        break
    default:
        // Code for fifth text view
        break
    }
}