Swift如何从CollectionviewCell中筛选indexPath值？

Question

I want to be able to reload the value in my DetailViewController. How do I segue the selected indexPath so I can call the value in the next view controller?

In my didSelectItemAt I have:

let monsters: Monsters!

let mons: [Monsters] = Data().mons
monsters = mons[indexPath.row] 

self.performSegue(withIdentifier: "DetailVC", sender: monsters)

Answer 1

You could create a monster property in DetailViewController , and then assign it when you call prepare(for segue:)

// This would be a property at the top of DetailViewController
var monster:Monster?

Then inside the VC that performs the segue, create a property for selectedMonster to assign based on indexPath :

var selectedMonster:Monster?

Then when you user selects a cell:

selectedMonster = mons[indexPath.row] 

In this same VC, this method would be called when the performSegue(withIdentifier:) gets called:

override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
    if segue.identifier == "DetailVC" {
        let detailVC = segue.destination as! DetailViewController
        detailVC.monster = selectedMonster
    }
}

You may want to check how you call performSegue(withIdentifier:) , usually you want the sender to be self , ie :

performSegue(withIdentifier: "DetailVC", sender: self)