table view display update of the loop

TableViewLoop.swift

//
//  ViewController.swift
//  SwiftCollatz
//
//  Created by 178inaba on 2015/10/18.
//  Copyright © 2015年 178inaba. All rights reserved.
//

import UIKit

class ViewController: UIViewController
    ,UITableViewDataSource
//,UITableViewDelegate
{

    @IBOutlet weak var targetNumField: UITextField!
    @IBOutlet weak var tableView: UITableView!
    
    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
        tableView.dataSource = self
        
        self.texts = ["Sunday"]
        var baseSec = 0.0
        for _ in 0...100 {
            let delay = baseSec * Double(NSEC_PER_SEC)
            testLoop(delay)
            baseSec += 1.0
        }
    }
    
    func testLoop(delay: Double) {
        
        let time  = dispatch_time(DISPATCH_TIME_NOW, Int64(delay))
        dispatch_after(time, dispatch_get_main_queue(), {
            self.texts.append("a")
            self.tableView.reloadData()
        })
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }

    @IBAction func tapCalc(sender: UIButton) {
        texts = ["Sunday"]
        for _ in 0...10 {
            texts.append("a")
            tableView.reloadData()
            sleep(1)
        }
        
        // calcCollatz(UInt64(targetNumField.text!)!)
    }

    func calcCollatz(num: UInt64) {
        print(num)

        if num % 2 == 1 && num > 1 {
            calcCollatz(3 * num + 1)
        } else if num % 2 == 0 {
            calcCollatz(num / 2)
        }
    }
    
    // display texts
    var texts = ["Sunday", "Sunday", "Sunday", "Sunday", "Sunday", "Sunday", "Sunday", "Sunday", "Sunday", "Sunday", "Sunday", "Sunday", "Sunday", "Sunday", "Sunday", "Sunday", "Sunday", "Sunday", "Sunday", "Sunday", "Sunday", "Sunday", "Sunday", "Sunday", "Sunday", "Sunday", "Sunday", "Sunday", "Sunday", "Sunday", "Sunday", "Sunday", "Sunday", "Sunday", "Sunday", "Sunday", "Sunday", "Sunday", "Sunday", "Sunday", "Sunday", "Sunday", "Sunday", "Sunday", "Sunday", "Sunday", "Sunday", "Sunday", "Sunday", "Sunday", "Sunday", "Sunday", "Sunday", "Sunday", "Sunday", "Sunday", "Sunday", "Sunday", "Sunday", "Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"]
    
    // cell count
    func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return texts.count
    }
    
    // update cell value
    func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
        let cell: UITableViewCell = UITableViewCell(style: UITableViewCellStyle.Subtitle, reuseIdentifier: "Cell")
        
        cell.textLabel?.text = texts[indexPath.row]
        return cell
    }
}