Fatal error : Index out of range - arrays

Question

I m getting this error :fatal error: Index out of range .I can't get what i m doing wrong .What i'm trying to do is , access an array dictionary by using an integer index than pass a string to get the value mapped to it .The sample works fine on playground but not excode why ? (The array dictionary is not empty)
Here is my code
var CondoIndivi2 = [[String:AnyObject]]()
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
scrollView.contentSize.height = 1500
print(CondoIndivi2)
if let description_Condo = self.CondoIndivi2[0]["description"] as? String {
print(description_Condo)
}
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
This is the view that sends data to CondoIndivi2
import UIKit
import Alamofire
import SwiftyJSON
class SignleCondoTableViewController: UITableViewController {
#IBOutlet var tableview: UITableView!
var singleCondoData = [[String:AnyObject]]()
var CondoIndivi = [[String:AnyObject]]()
override func viewDidLoad() {
super.viewDidLoad()
// Uncomment the following line to preserve selection between presentations
// self.clearsSelectionOnViewWillAppear = false
// Uncomment the following line to display an Edit button in the navigation bar for this view controller.
// self.navigationItem.rightBarButtonItem = self.editButtonItem()
self.tableView.delegate = self
self.tableView.dataSource = self
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
// MARK: - Table view data source
override func numberOfSectionsInTableView(tableView: UITableView) -> Int {
// #warning Incomplete implementation, return the number of sections
return 1
}
override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
// #warning Incomplete implementation, return the number of rows
return singleCondoData.count
}
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("Cell", forIndexPath: indexPath) as! SignleTableTableViewCell
if singleCondoData.count != 0 {
let dict = singleCondoData[indexPath.row] as NSDictionary
//cell.label1.text? = (dict["name"] as? String)!
if let nullcheck = (dict["address"] as? String) {
cell.label2.text? = nullcheck
}
}
return cell
}
override func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
let dict = singleCondoData[indexPath.row] as NSDictionary
if let unitNullCheck = (dict["mls_number"] as? String) {
let item_id = unitNullCheck
getCondoUnits(item_id)
print(item_id)
}
}
//get the individual condo id
func getCondoUnits(condo_id : String){
Alamofire.request(.GET, "http://android.goidx.com/search/?mls_number=" + String(condo_id)).validate().responseJSON { response in
if let value = response.result.value {
let json = JSON(value)
if let resData = json.arrayObject {
self.CondoIndivi = resData as! [[String:AnyObject]]
print(self.CondoIndivi)
}
if self.CondoIndivi.count > 0 {
self.tableview.reloadData()
}
}
}
}
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
if let identifier = segue.identifier {
switch identifier {
case "details" :
let buildingdDetailVC = segue.destinationViewController as! DetailsViewController
buildingdDetailVC.CondoIndivi2 = self.CondoIndivi
default:
break
}
}
}
/*
// Override to support conditional editing of the table view.
override func tableView(tableView: UITableView, canEditRowAtIndexPath indexPath: NSIndexPath) -> Bool {
// Return false if you do not want the specified item to be editable.

Answer 1

As #James put in his comment, you're creating an empty array in your code:
var CondoIndivi2 = [[String:AnyObject]]()
And then you're trying to access indexing in the position 0:
if let description_Condo = self.CondoIndivi2[0]["description"] as? String {
print(description_Condo)
}
And of course, you will have a runtime error of Index of out Range because your array it's empty, you always need to be sure before index an array that the index is greater than zero, less than equal to the size of the array and the array is not empty.
I hope this help you.

Answer 2

Inside your getCondoUnits(condo_id : String) is an asynchronous block(Alamofire.request), the CondoIndivi2 is received later than the viewDidLoad is executed. You should just pass condo_id to next viewController and do the request in it.