Append array from another Controller - ios

Question

I want to append new element to array. I'm using container view. I call addItem function to tableviewcontroller. But I clicked button nothing happen.
My TableViewController
import UIKit
class TableViewController: UITableViewController {
var myArray = ["1"]
override func viewDidLoad() {
super.viewDidLoad()
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
func addItem () {
myArray.append("asd")
tableView.reloadData()
}
// 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 myArray.count
}
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("myCell", forIndexPath: indexPath)
// Configure the cell...
cell.textLabel?.text = myArray[indexPath.row]
return cell
}
}
My TableViewController
import UIKit
class ViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
#IBAction func addButton(sender: AnyObject) {
TableViewController().addItem()
}
}

Answer 1

The line TableViewController().addItem() means create a brand new instance of TableViewController and then call addItem() on it. You need to find a reference to the specific instance of TableViewController you want to manipulate. How does that ViewController relate to the one calling addItem?

Answer 2

It should be something like this:
class ViewController: UIViewController {
let tableViewController = TableViewController()
..
#IBAction func addButton(sender: AnyObject) {
tableViewController.addItem()
}
}