How do i reach indexPath in a custom func?-CodePudding

I am trying to open a second UIAlertController upon choosing an option in the first UIAlertController but I am unable to reach indexPath in order to set a property from a textField of a second AlertController. Here's the snippet:

override func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
    
    let ac = UIAlertController(title: "Choose an action", message: nil, preferredStyle: .alert)
    ac.addAction(UIAlertAction(title: "Rename a person", style: .default, handler: alert2))
    ac.addAction(UIAlertAction(title: "Delete", style: .destructive) {
        [weak self] _ in
        self?.people.remove(at: indexPath.item)
        self?.collectionView.reloadData()
    })
    ac.addAction(UIAlertAction(title: "Cancel", style: .cancel))
    present(ac, animated: true)
}
func alert2(alert: UIAlertAction!) {
    let ac2 = UIAlertController(title: "Type in a name", message: nil, preferredStyle: .alert)
    ac2.addAction(UIAlertAction(title: "Ok", style: .default, handler: nil))
    self.present(ac2, animated: true)
    guard let newName = ac2.textFields?[0].text else { return }
    let person = people[indexPath.item]
    person.name = newName
    self.collectionView.reloadData()
    ac2.addTextField()
}

I also get the "Cannot find 'indexPath' in scope" error in this string: let person = people[indexPath.item] Could you please help me to work it out?

CodePudding user response：

You need to pass the indexPath into the alert2 function. Try this new alert2 function:

func alert2(alert: UIAlertAction!, indexPath:IndexPath) {
    let ac2 = UIAlertController(title: "Type in a name", message: nil, preferredStyle: .alert)
    ac2.addAction(UIAlertAction(title: "Ok", style: .default, handler: nil))
    self.present(ac2, animated: true)
    guard let newName = ac2.textFields?[0].text else { return }
    let person = people[indexPath.item]
    person.name = newName
    self.collectionView.reloadData()
    ac2.addTextField()
}

And you would replace this line:

ac.addAction(UIAlertAction(title: "Rename a person", style: .default, handler: alert2))

with this:

let action = UIAlertAction(title: "Rename a person", style: .default) { action in
    alert2(alert: action, indexPath: indexPath)
}
ac.addAction(action)

CodePudding user response：

Cannot find 'indexPath' in scope is given because your function is not able to find index number. you should pass Indexpath parameter through your function alert2 change your function func alert2(alert: UIAlertAction!) to func alert2(alert: UIAlertAction!, indexPath:IndexPath) then you will found the index. for your reference :

func alert2(alert: UIAlertAction!, indexPath:IndexPath) {
    ... your code ...

    let person = people[indexPath.item]

    ... your code ...
}