swift xml rss reader... make it async

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Hi i'm trying to work on a simple exercise. i made this basic xml rss reader, it works fine but i would love to improve it and worry about async loading. How should i do?

import UIKit

class ViewController: UITableViewController, NSXMLParserDelegate, UITableViewDelegate {



    let urlstring = "http://ift.tt/1merQXG"
    var element:NSString = ""
    var items:[String] = []
    var item = ""


    override func viewDidLoad() {
        super.viewDidLoad()

     //   dispatch_queue_t myQueue = dispatch_queue_create("queue",NULL)

        loadParser()
    }

    //MARK - tableviewdelegate

    override func numberOfSectionsInTableView(tableView: UITableView) -> Int {
        return 1
    }

    override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return items.count
    }


    override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCellWithIdentifier("Cell", forIndexPath: indexPath) as UITableViewCell

        cell.textLabel.text = items[indexPath.row]

        return cell
    }

    //MARK - parser

    func loadParser(){
        let url = NSURL(string: urlstring)
        var parser = NSXMLParser(contentsOfURL: url)
        parser?.delegate = self
        parser?.shouldProcessNamespaces = true
        parser?.shouldReportNamespacePrefixes = true
        parser?.shouldResolveExternalEntities = true
        parser?.parse()
    }



    //MARK: - Parser Delegate

    func parser(parser: NSXMLParser!, didStartElement elementName: String!, namespaceURI: String!, qualifiedName qName: String!, attributes attributeDict: [NSObject : AnyObject]!) {

        element = elementName
        if ((elementName as NSString).isEqualToString("item")){
            item = ""
        }

    }


    func parser(parser: NSXMLParser!, didEndElement elementName: String!, namespaceURI: String!, qualifiedName qName: String!) {

        if ((elementName as NSString).isEqualToString("item")){
            items.append(item)
        }
    }


    func parser(parser: NSXMLParser!, foundCharacters string: String!) {
        if ( (element.isEqualToString("title")) && (element != "") ){
            item += string
        }
    }



    func parserDidEndDocument(parser: NSXMLParser!) {
        println(items)
        self.tableView.reloadData()
    }


}

i am not sure how to do. i'm trying to wrap the "loadParser" in a dispatch queue but in swift it's not working. can you guys tell me how to do that using GCD ? thanks

asked 57 secs ago

Marco

6

swift xml rss reader... make it async