Getting an index from an array pulled from Parse.com - fatal error: Cannot index empty buffer

Question

I'm fairly new to Swift and I've been trying to pull individual items from an array stored in Parse.com

When printing the array itself, I get all the users, however, when attempting to get the first index of an array I get the following error

"fatal error: Cannot index empty buffer"

This is code I'm currently using -

import UIKit
import Parse
class feedTableViewController: UITableViewController {
  var titles = [String]()
  var usernames = [String]()
  var images = [UIImage]()
  var imageFiles = [PFFile]()

  override func viewDidLoad() {
    super.viewDidLoad()
    //....
  }

  override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {

    var myCell:cell = self.tableView.dequeueReusableCellWithIdentifier("myCell") as cell
    //Error occurs here - does not work due to empty buffer
    myCell.title.text = titles[indexPath.row]
    myCell.username.text = usernames[indexPath.row]
    //If the previous two lines are commented out, I can print out both the arrays
    println(titles)
    println(usernames)

    return myCell
  }
}

Thanks!

Please reduce your code to a Minimal, Complete, and Verifiable example. Please also specify on which line the error you quoted occurs. — Aaron Brager
– Aaron Brager, Commented Jun 23, 2015 at 15:51
@AaronBrager I have reduced the code and narrowed down to where the error is displayed on xCode. Though I would've thought that the removed code may have helped others understand the code better? Thanks — Javz
– Javz, Commented Jun 23, 2015 at 16:05
Does println(titles[indexPath.row]) print what you expect? titles may be empty, or may have fewer elements than you return in numberOfRowsInSection — Aaron Brager
– Aaron Brager, Commented Jun 23, 2015 at 16:22
@AaronBrager No it doesn't. It gives me the same error when printed out. However, I currently feel like crying. numberOfRowsInSection was the culprit. It wasn't calling the number of items of the array, rather a set number. Thanks Aaron. Much appreciated. You have NO idea how long I've spent trying to fix this..... — Javz
– Javz, Commented Jun 23, 2015 at 16:53

Aaron Brager · Accepted Answer · 2015-06-23 16:55:09Z

1

Make sure the number of elements in titles matches the number you return in numberOfRowsInSection.

answered Jun 23, 2015 at 16:55

Aaron Brager

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