I'm creating an app that reads news when I press the update button, but how do I read news when I open the app?

import UIKit

classViewController:UITableViewController {

    variants = NSMutableArray()

    let newsUrlStrings = [
        "http://ajax.googleapis.com/ajax/services/feed/load?v=1.0&q=http://www3.nhk.or.jp/rss/news/cat0.xml&num=8",
        "http://ajax.googleapis.com/ajax/services/feed/load?v=1.0&q=http://www3.nhk.or.jp/rss/news/cat6.xml&num=8",
        "http://ajax.googleapis.com/ajax/services/feed/load?v=1.0&q=http://www3.nhk.or.jp/rss/news/cat7.xml&num=8"
        ]

    let imageNames = [
    "Japan.jpg",
    "world.jpg",
    "sport.jpg",
    ]

    @ IBAction func refresh (sender: AnyObject) {
        entries.removeAllObjects()


        for newsUrlString in newsUrlString {

            varurl = NSURL (string:newsUrlString) !
            var task = NSURLSession.sharedSession().dataTaskWithURL(url, completionHandler: {data, response, error in

                variable=NSJSONSERIALIZATION.JSONObjectWithData(data, options:NSJSONReadingOptions.MutableContainers, error:nil) as!NSDictionary

                if var responseData=dict["responseData"] as ? NSDictionary {
                    if var feed=responseData["feed"]as? NSDictionary {
                        if varentries=feed ["entries"] as ? US>NSArray {

                            var formatter = NSDateFormatter()
                            formatter.locale=NSLocale(localeIdentifier: "en-US")
                            formatter.dateFormat="EEE,ddMMMMMYyyy HH:mm:sszzzz"

                            for vari=0;i<entries.count;i++{
                                variable=entries[i]as!NSMutableDictionary

                                entry ["url"] = newsUrlString

                                vardateStr=entry["publishedDate"] as!String
                                vardate=formatter.dateFromString(dateStr)
                                entry ["date"] = date
                            }

                            self.entries.addObjectsFromArray (entries as [AnyObject])

                            self.entries.sortUsingComparator({object1, object2 in)

                            vardate1 = object1 ["date"] as!NSDate
                            vardate2 = object2 ["date"] as!NSDate

                            var order=date1.compare(date2)

                                if order==NSComparisonResult.OrderedAscending{
                                    returnNSComparisonResult.OrderedAscending
                                }
                                else if order == NSComparisonResult.OrderedAscending {
                                    returnNSComparisonResult.OrderedAscending
                                }

                                return order
                            })
                        }
                    }
                }



                dispatch_async(dispatch_get_main_queue(), {

                    self.tableView.reloadData()

                    })
                })


            task.resume()
        }
    }

    override func viewDidLoad(){
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from anib.
    }

    override funcdidReceiveMemoryWarning(){
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }
    override functableView (tableView: UITableView, numberOfRowsInSection
        section: Int) - > Int {
        return entries.count
    }

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

        varcell=tableView.dueReusableCellWithIdentifier("news") as!UITableViewCell

        US>var entry=entries [indexPath.row] as!NSDictionary

        variableLabel=cell.viewWithTag(1)as!UILabel
        titleLabel.text=entry["title"] as ? String

        var descriptionLabel=cell.viewWithTag(2)as!UILabel
        descriptionLabel.text=entry["contentSnippet"] as ? String

        var urlString=entry ["url"] as!String
        var index = find(newsUrlStrings, urlString)
        varimageName=imageNames [index!]
        var image = UIImage (named: imageName)

        varimageView=cell.viewWithTag(4)as!UIImageView
        imageView.image=image
        return cell
    }

    override functableView(tableView:UITableView, didSelectRowAtIndexPathindexPath:NSIndexPath){
        performSegueWithIdentifier("detail", sender:entries [indexPath.row])
    }

    override func prepareForSegue(segue:UIStoryboardSegue, sender:AnyObject?) {
        if segue.identifier == "detail" {
            var detailController=segue.destinationViewController as!DetailController

                    detailController.entry=sender as!NSDictionary
                }
            }
}