Passing value from struct array with segue : index out of range - ios

Question

Hopefully this will be the last question i need to ask!
I have been looking into this for 48 hours now and i still cannot find answers.
Here is the code i am using:
DataSource.swift:
struct Game {
var name : String
var cheats : [Cheat]
}
struct Cheat {
var name : String
var code : String
var desc : String
}
GameListViewController.swift
import Foundation
import UIKit
class GameListViewController: UITableViewController {
var gamesArray = [Game]()
var cheatsArray = [Cheat]()
override func viewDidLoad() {
super.viewDidLoad()
gamesArray = [Game(name: "Game1", cheats: [Cheat(name: "cheat1", code: "code1", desc: "desc1")])]
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
override func numberOfSectionsInTableView(tableView: UITableView) -> Int {
return 1
}
override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return gamesArray.count
}
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = self.tableView.dequeueReusableCellWithIdentifier("cell", forIndexPath: indexPath) as UITableViewCell!
cell.textLabel?.text = gamesArray[indexPath.row].name
return cell
}
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
let indexPath : NSIndexPath = self.tableView.indexPathForSelectedRow!
let DestViewController = segue.destinationViewController as! CheatListViewController
var DataPass : Cheat
DataPass = cheatsArray[indexPath.row]
DestViewController.cheatnameArray = DataPass.name
var DataPass2 : Cheat
DataPass2 = cheatsArray[indexPath.row]
DestViewController.cheatcodeArray = DataPass2.code
var DataPass3 : Cheat
DataPass3 = cheatsArray[indexPath.row]
DestViewController.cheatdescArray = DataPass3.desc
}
}
CheatListViewController.swift
class CheatListViewController: UITableViewController {
var cheatcodeArray = String()
var cheatnameArray = String()
var cheatdescArray = String()
override func viewDidLoad() {
super.viewDidLoad()
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
}
When i select "Game 1" from gamesArray i instantly receive an index out of range error from the first instance of "DataPass".
I have structured my datasource in this way so that i do not have to edit arrays separately and keep my objects neat and tidy.
If someone could point me in the right direction i would be forever grateful !
Kind regards
Rory

Answer 1

For me it looks like you haven't populated your cheatsArray variable with any cheats. That's why you receive an index out of range exception.
From your code it is a bit hard to understand what you're looking to achieve, but I think I have it..
Notice I use an optional binding to unwrap the destinationViewController, this is safe because any other segue performed will also trigger the same prepareForSegue.
if let destViewController = segue.destinationViewController as? CheatListViewController {
let indexPath : NSIndexPath = self.tableView.indexPathForSelectedRow!
var game = gamesArray[indexPath.row]
destViewController.cheatnameArray = game.cheats.map({ $0.name })
destViewController.cheatcodeArray = game.cheats.map({ $0.code })
destViewController.cheatdescArray = game.cheats.map({ $0.desc })
}
Change your arrays to actual string arrays and not strings..
var cheatcodeArray = [String]()
var cheatnameArray = [String]()
var cheatdescArray = [String]()
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