swiftの学習（xcodeのrssリーダーサンプル）

概要

• RSS2.0専用
• webview使用
• なんか一覧表示がおかしい
• ナビゲーション使用

実装

画面設計

ViewController.swift

//
//  ViewController.swift
//

import UIKit

class ViewController: UIViewController, UITableViewDataSource, UITableViewDelegate, NSXMLParserDelegate{
    
    // rss2.0
    var rssUrl : NSURL!
        {
        didSet{
            let request : NSURLRequest = NSURLRequest(URL:self.rssUrl)
            func completionBlock(data: NSData!, response: NSURLResponse!, error: NSError!) -> Void {
                var parser : NSXMLParser = NSXMLParser(data: data)!
                parser.delegate = self;
                parser.parse()
            }
            var task : NSURLSessionDataTask = NSURLSession.sharedSession().dataTaskWithRequest(request, completionHandler:completionBlock)
            task.resume()
        }
    }
    
    @IBOutlet var table: UITableView!
    
    var items = [Dictionary<String, String>]()
    
    override func viewDidLoad() {
        super.viewDidLoad()
        request()
    }
    
    override func viewWillAppear(animated: Bool) {
        super.viewWillAppear(animated)
        table.reloadData()
    }
    
    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
        
    }
    
    func request(){
        let url : NSURL = NSURL(string: "http://m-shige1979.hatenablog.com/rss")!
        items = [Dictionary<String, String>]()
        self.rssUrl = url
    }
    
    func numberOfSectionsInTableView(tableView: UITableView!) -> Int
    {
        return 1;
    }
    
    func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int{
        // リストの件数を返す
        return  self.items.count
    }
    
    // セルをitemsから設定する処理
    func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell{
        let cell: UITableViewCell = UITableViewCell(style: UITableViewCellStyle.Subtitle, reuseIdentifier: "Cell")!
        cell.textLabel?.text = items[indexPath.row]["name"]!
        cell.detailTextLabel?.text = items[indexPath.row]["url"]
        
        cell.textLabel?.font = UIFont.systemFontOfSize(12)
        cell.textLabel?.numberOfLines = 0
        
        return cell;
    }
    
    // セルをクリックした時に発生するイベント
    func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath){
        var idx = indexPath.row
        
        let controller = DetailController()
        
        var url:String = items[idx]["url"]!
        controller.url = url
        
        self.navigationController!.pushViewController(controller, animated: true)
        self.table.deselectRowAtIndexPath(indexPath, animated: true)
        
    }
    
    var parseKey = ""
    var titleStr = ""
    var titleUrl = ""
    var index = -1
    
    // パースの最初に呼ばれる
    func parserDidStartDocument(parser: NSXMLParser!)
    {
        //println("parserDidStartDocument")
        index = -1
        items = [Dictionary<String, String>]()
    }
    
    // タグの最初
    func parser(parser: NSXMLParser!, didStartElement elementName: String!, namespaceURI: String!, qualifiedName qName: String!, attributes attributeDict: NSDictionary!)
    {
        //println("parser didStartElement " + elementName)
        
        parseKey = ""
        if elementName == "item" {
            titleStr = ""
            items.append([
                "name": "",
                "url": ""
            ])
            index = items.count - 1
            
        }else{
            parseKey = elementName
        }
    }
    
    // タグの最後
    func parser(parser: NSXMLParser!, didEndElement elementName: String!, namespaceURI: String!, qualifiedName qName: String!)
    {
        //println("parser didEndElement " + elementName)
        
        parseKey = ""
    }
    
    // パース処理
    func parser(parser: NSXMLParser!, foundCharacters string: String!)
    {
        //println("parser " + "foundCharacters")
        
        if index >= 0 {
            if parseKey == "title" {
                items[index]["name"] = items[index]["name"]! + string
            
            }else if parseKey == "link" {
                items[index]["url"] = string
            }
        }
        
    }
    
    // パースの最後に呼ばれる
    func parserDidEndDocument(parser: NSXMLParser!)
    {
        //println("parserDidEndDocument")
        //println("items = \(items.count)")
        
        // 再読み込み
        self.table.reloadData()
    }

}

DetailContoller.swift

//
//  DetailController.swift
//

import UIKit

class DetailController: UIViewController, UIWebViewDelegate{
    
    
    var webview: UIWebView = UIWebView()
    
    var url:String = ""
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        loadAddressURL()
        
    }
    
    func loadAddressURL() {
        
        self.webview.frame = self.view.bounds
        self.webview.delegate = self;
        self.view.addSubview(self.webview)
        
        let requestURL = NSURL(string: self.url)
        let req = NSURLRequest(URL: requestURL!)
        self.webview.loadRequest(req)
    }
    
    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
        
    }
    
    func webView(webView: UIWebView!, shouldStartLoadWithRequest request: NSURLRequest!, navigationType: UIWebViewNavigationType) -> Bool {
        
        return true
    }
    
}

実行

参考

iPhone - SwiftのRSS Readerを100行で作ったよ - Qiita

http://eure.jp/blog/swift_rss_kim/