Question

我正在尝试使用网络调用中的数据在UItableview中显示为单元名称

这是我当前的视图控制器

import UIKit
import Alamofire
import SwiftyJSON




class ViewController: UIViewController, UITableViewDataSource{

    var articles = [Article]()

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

        //get data from network call
        loaddata()

        //end view did load
    }

    func loaddata(){

        Alamofire.request(.GET, "http://ip-address/test.json")
            .responseJSON { response in
                // print(response.request)  // original URL request
                // print(response.response) // URL response
                //print(response.data)     // server data
                //print(response.result)   // result of response serialization

                /*if let JSON = response.result.value {
                print("JSON: \(JSON)")
                }*/

                //get json from response data
                let json = JSON(data: response.data!)
                //print(json)

                //for loop over json and write all article titles articles array
                for (key, subJson) in json["Articles"] {
                    if let author = subJson["title"].string {
                        let artTitle = Article(name: author)
                        self.articles.append(artTitle!)


                    }
                    /*if let content = subJson["content"].string {
                    // self.Content.append(content)

                    }*/

                }
                // print("\(self.titles)")
                //print("\(self.Content[0])")
                //print(self.articles)

                //set variable to articles number 6 to check append worked
                let name = self.articles[6].name

                //print varibale name to check
                print("\(name)")

        }

        }



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

    func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {

        //let num = articles.count
       // print(num)
        //return number of rows
        return articles.count
    }

    func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
        let cell = UITableViewCell()

        //let (artTitle) = articles[indexPath.row]

        // Fetches the appropriate article for the data source layout.
        let article = articles[indexPath.row]

        //set cell text label to article name
        cell.textLabel?.text = article.name
        return cell
    }



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



    //end of class
    }

这是Article.swift文件

class Article {
    // MARK: Properties

    var name: String


    // MARK: Initialization

    init?(name: String) {
        // Initialize stored properties.
        self.name = name


        // Initialization should fail if there is no name or if the rating is negative.
        if name.isEmpty {
            return nil
        }
    }

}

我想我差不多了，到目前为止我能做的就是

与alamofire的网络通话正在运行
我可以使用swiftJson获取文章标题
然后我附上文章标题
然后我可以在for循环之后从文章打印，所以我知道它的工作。

我无法将其设置为单元格名称

这是因为在加载数据之前加载了UItableview，因此该文章在那时是空的吗？

你能否指出我最好的做法，比如这个/最好的设计模式，并帮助我加载数据

Answer 1

从请求中获取数据后，在主线程上的tableView上调用reloadData，如此。

dispatch_async(dispatch_get_main_queue(), {
    [unowned self] in
    self.tableView.reloadData()
})

这将使tableView刷新其所有内容，然后您的数据将显示出来。

Answer 2

Alamofire.request(.GET, Urls.menu).responseJSON { response in
    if let jsonData = response.data {    
        dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_HIGH, 0)) {
            let json = JSON(data: jsonData)

            //for loop over json and write all article titles articles array

            newArticles = [Articles]()
            for (key, subJson) in json["Articles"] {
                if let author = subJson["title"].string {
                    if let artTitle = Article(name: author) {
                        newArticles.append(artTitle)
                    }                    
                }
            }
            dispatch_async(dispatch_get_main_queue()) {
                self.articles += newArticles 
                tableView.reloadData()
                /*if let content = subJson["content"].string {
                // self.Content.append(content)

                }*/
            }

            // print("\(self.titles)")
            //print("\(self.Content[0])")
            //print(self.articles)

            //set variable to articles number 6 to check append worked
            let name = self.articles[6].name

            //print varibale name to check
            print("\(name)")

        }
    }
}

在UITableView

2 个答案: