Swift Json - 从 API 获取数据

Question

我在尝试从 Web api 获取数据时遇到问题。但我得到的是零。我无法从 api 获取文章列表。有什么建议吗？

api 文档地址：yazar.io/doc/

我的 NSObject 文件：

import Alamofire
struct YazarIoService {

    // Doc http://yazar.io/doc/        
    private static let baseURL = "http://yazar.io"
    private enum ResourcePath: Printable {

        case Articles
        case StoryUpvote(storyId: Int)
        var description: String {
            switch self {
            case .Articles: return "/api/article/feed/1"
            case .StoryUpvote(let id): return "/api/client/favorites/action/"
            }
        }
    }

    static func articleForSection(section: String, page: Int, response: (JSON) -> ()){

        let urlString = baseURL + ResourcePath.Articles.description
        println(urlString)
        let parameters = [
            "page": toString(page)
        ]
        println(parameters)

        Alamofire.request(.GET, baseURL, parameters: parameters).responseJSON{(_, _, data, _) -> Void in
            let articles = JSON(data ?? [])
            response(articles)
        }
    }

我的 table 视图控制器；

class articlesTableViewController: UITableViewController, MakaleTableViewCellDelegate {

    let transitionManager = TransitionManager()
    var articles: JSON! = []

    func loadarticles(section: String, page: Int){
        YazarIoService.articleForSection(section, page: page) { (JSON) -> () in
            self.articles = JSON["articles"]
            self.tableView.reloadData()
        }
     }

    override func viewDidLoad() {
        super.viewDidLoad()


        UIApplication.sharedApplication().setStatusBarStyle(UIStatusBarStyle.LightContent, animated: true)

        tableView.estimatedRowHeight = 100
        tableView.rowHeight = UITableViewAutomaticDimension

        loadarticles("", page: 1)
        println(articles[])
    }

    @IBAction func MenuButtonDidTouch(sender: AnyObject) {
        performSegueWithIdentifier("MenuSegue", sender: self)
    }


    @IBAction func LoginbutonDidTouch(sender: AnyObject) {
        performSegueWithIdentifier("LoginSegue", sender: self)
    }

    //number of rows
    override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {

        return articles.count //
    }


    override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCellWithIdentifier("MakaleCell") as MakaleTableViewCell //--> cell'in özelliklerine erişmek içim bunu yazdık. Eskiden UITableViewCell'di. Değiştirmezsen cell.title... vs çalışmakz.

        let makale = articles[indexPath.row]
        cell.configureWithMakale(makale)

        cell.delegate = self

        return cell            
    }


    override func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
        performSegueWithIdentifier("WebSegue", sender: indexPath) 

        tableView.deselectRowAtIndexPath(indexPath, animated: true)
    }


    // MARK: MakaleTableViewCellDelegate

    func makaleTableViewCellDidTouchUpvote(cell: MakaleTableViewCell, sender: AnyObject) {
        // TODO: Implement Upvote
    }

    func makaleTableViewCellDidTouchComment(cell: MakaleTableViewCell, sender: AnyObject) {
        performSegueWithIdentifier("CommentsSegue", sender: self)
    }

    // MARK: Misc

    override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
        if segue.identifier == "WebSegue" {  
            let toView = segue.destinationViewController as WebViewController
            let indexPath = sender as NSIndexPath
            let url = articles[indexPath.row]["article_url"].string!
            toView.url = url


            UIApplication.sharedApplication().setStatusBarHidden(true, withAnimation: UIStatusBarAnimation.Fade)

            toView.transitioningDelegate = transitionManager
        }
    }

}

Answer 1

您正在请求中使用 baseURL

 static func articleForSection(section: String, page: Int, response: (JSON) -> ()){

        let urlString = baseURL + ResourcePath.Articles.description
        println(urlString)
        let parameters = [
            "page": toString(page)
        ]
        println(parameters)

        Alamofire.request(.GET, baseURL, parameters: parameters).responseJSON{(_, _, data, _) -> Void in
            let articles = JSON(data ?? [])
            response(articles)
        }
    }

像这样将 baseURL 更改为 urlString

 Alamofire.request(.GET, urlString, parameters: parameters).responseJSON{(_, _, data, _) -> Void in
        let articles = JSON(data ?? [])
        response(articles)
    }

Answer 2

这个 link http://yazar.io/api/newspaper/1 给出了一个 404 错误，所以很明显你会从请求中返回一个 nil。

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