Add two guard let in a prepare for segue function

Question

I'm trying to build my first app with three tableViews which are hierarchical. The middle VC has two guard let in one prepare for segue function.

  override func prepare(for segue: UIStoryboardSegue, sender: Any?) {

        guard let destination = segue.destination as? AddMemberViewController else {
            return
        }
        destination.club = club

        guard let Destination = segue.destination as? TransactionViewController, let selectedRow = self.tableViewMember.indexPathForSelectedRow?.row else {
            return
        }
        Destination.member = members[selectedRow]

    }

That's how it looks like. Can I fix this, that both func get used by my app, because it just uses the one on the top.

Answer 1

The problem is if you want to segue to TransactionViewController the function already returns because segue.destination is not AddMemberViewController.

Instead you should give your segues different identifiers and ask for them in prepareForSegue. Something like this:

override func prepare(for segue: UIStoryboardSegue, sender: Any?) {

    if segue.identifier == "AddMemberVCSegue" {
        guard let destination = segue.destination as? AddMemberViewController else {
            return
        }
        destination.club = club
    }

    if segue.identifier == "TransactionVCSegue" {
        guard let Destination = segue.destination as? TransactionViewController, let selectedRow = self.tableViewMember.indexPathForSelectedRow?.row else {
            return
        }
        Destination.member = members[selectedRow]
    }
}