使用SwiftyJSON和Alamofire在TableView上显示JSON数据 [英] Showing JSON data on TableView using SwiftyJSON and Alamofire

问题描述

我想在表视图上显示从服务器获取的JSON数据.问题是，我无法让它显示在上面.我尝试了几种不同的方法，并进行了大量搜索以找到解决方案，但我做不到.

I want to show the JSON data grabbed from a server on a Table View. The problem is, I can't get it to show up on it. I have tried several different methods and searched a lot to find a solution, but I can't.

我的代码(所有代码)如下所示，希望有人能帮助我.预先感谢.

My code (all of it) is shown below and I hope somebody can help me out. Thanks in advance.

import UIKit
import Alamofire
import SwiftyJSON

class MasterViewController: UITableViewController {

var tableTitle = [String]()
var tableBody = [String]()

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

    getJSON()

}

func getJSON(){

    Alamofire.request(.GET, "http://announcement.vassy.net/api/AnnouncementAPI/Get/").responseJSON { (Response) -> Void in

        // checking if result has value
        if let value = Response.result.value {

            let json = JSON(value)

            for anItem in json.array! {

                let title: String? = anItem["Title"].stringValue
                let body: String? = anItem["Body"].stringValue
                self.tableTitle.append(title!)
                self.tableBody.append(body!)

            }

        }

    }

    self.tableView.reloadData()

}

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

// Table View Stuff

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

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


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

    // cell config
    cell.title!.text = tableTitle[indexPath.row]
    cell.body!.text = tableBody[indexPath.row]
    return cell

}

}

推荐答案

Alamofire网络请求是异步的，这意味着您不知道何时返回结果.

The Alamofire network request is asynchronous, meaning you can't know when the result will come back.

这里的问题是您将tableView 重新加载到Alamofire请求的范围之外，因此它在数据返回之前执行.

The problem here is that you reload the tableView outside the scope of the Alamofire request, so it is executed before the data comes back.

重新加载应该在相同的作用域内并且在主线程上进行，例如:

The reload should happen in the same scope, and on the main thread, for example:

func getJSON(){

    Alamofire.request(.GET, "http://announcement.vassy.net/api/AnnouncementAPI/Get/").responseJSON { (Response) -> Void in

        // checking if result has value
        if let value = Response.result.value {

            let json = JSON(value)

            for anItem in json.array! {

                let title: String? = anItem["Title"].stringValue
                let body: String? = anItem["Body"].stringValue
                self.tableTitle.append(title!)
                self.tableBody.append(body!)

            }

            dispatch_async(dispatch_get_main_queue()) {
                self.tableView.reloadData()             
            }

        }

    }

}

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