Addition to NSMutableArray() during NSURL session not recognized after session - ios

Question

I am using NSURL to get the source code of a website page. I am passing MySQL query instructions via the URL to interact with the database to get a list of a user's friends. Everything works well up to the point of adding the returned data to an array, to them be filed into a table view. The website's response prints to the terminal well, however if I add it to the array to be added to the table view, it is not recognized after the NSURl session is complete.
Code:
//
// viewFriendsViewController.swift
// collaboration
//
// Created by nick on 11/12/15.
// Copyright © 2015 Supreme Leader. All rights reserved.
//
import UIKit
class viewFriendsViewController: UIViewController {
#IBOutlet weak var tableView: UITableView!
var textArray: NSMutableArray! = NSMutableArray()
func tableView(tableView: UITableView, numberOfRowsInSection Section: Int) -> Int {
return self.textArray.count
}
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
var cell: UITableViewCell = self.tableView.dequeueReusableCellWithIdentifier("cell")! as UITableViewCell
cell.textLabel?.text = self.textArray.objectAtIndex(indexPath.row) as? String
return cell
}
override func viewWillAppear(animated: Bool) {
let username = NSUserDefaults.standardUserDefaults().stringForKey("username")
if username != nil {
let myUrl = NSURL(string: "http://www.casacorazon.org/ios.html")
let request = NSMutableURLRequest(URL: myUrl!)
request.HTTPMethod = "POST"
let task = NSURLSession.sharedSession().dataTaskWithRequest(request) {
data, response, error in
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_HIGH, 0)) {
let responseString = NSString(data: data!, encoding: NSUTF8StringEncoding)
if error != nil {
print("Error: \(error)")
}
self.textArray.addObject(responseString as! String)
}
}
task.resume()
} else {
self.textArray.addObject("Error")
self.textArray.addObject("You are not logged in")
}
self.tableView.rowHeight = UITableViewAutomaticDimension
self.tableView.estimatedRowHeight = 44.0
}
override func viewDidLoad() {
super.viewDidLoad()
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
}
Thank you for the help

Answer 1

You have to reload the table view data. Add
self.tableView.reloadData()
right after
self.textArray.addObject(responseString as! String)
I recommend to declare textArray as non-optional Swift Array
var textArray = [String]()
then all occurrences of addObject have to replaced with append
and change the line in cellForRowAtIndexPath to get the value for index path to
cell.textLabel?.text = self.textArray[indexPath.row] // no type casting needed