如何将 Json 数据推送到 UITableView 中的标签？答案

【问题标题】：How do I push Json data to labels in a UITableView?如何将 Json 数据推送到 UITableView 中的标签？
【发布时间】：2016-04-22 11:02:47
【问题描述】：

我在自定义 UITableview 单元格中有 3 个标签，我正在尝试传递我从 Alamofire 的 api 获得的 json 数据，但我很难理解如何将返回的 json 推送到 tableview 中。任何帮助将不胜感激。代码如下：

import UIKit
import Parse
import Alamofire

class LeagueTableController: UIViewController, UITableViewDataSource,     UITableViewDelegate {

override func viewDidLoad() {
    super.viewDidLoad()

    Alamofire.request(.GET, "https://api.import.io/store/connector/88c66c----9b01-6bd2bb--d/_query?input=webpage/url:----") .responseJSON { response in // 1
        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)")
        }
    }
}

func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    return 1
}

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


}

这样返回的json：

  {
connectorGuid = "88c66cb4-e64f-4316-9b01-6bd2bb2d762d";
connectorVersionGuid = "8aedfe43-948a-4559-b279-d3c3c28047a4";
cookies =     (
);
offset = 0;
outputProperties =     (
            {
        name = team;
        type = URL;
    },
            {
        name = played;
        type = DOUBLE;
    },
            {
        name = points;
        type = DOUBLE;
    }
);
pageUrl = "http://www.extratime.ie/leagues/2024/100/premier-division/";
results =     (
            {
        played = 9;
        "played/_source" = 9;
        points = 22;
        "points/_source" = 22;
        team = "http://www.extratime.ie/squads/17/";
        "team/_source" = "/squads/17/";
        "team/_text" = Dundalk;
    },
            {
        played = 9;
        "played/_source" = 9;
        points = 20;
        "points/_source" = 20;
        team = "http://www.extratime.ie/squads/7/";
        "team/_source" = "/squads/7/";
        "team/_text" = "Derry City";
    },
            {
        played = 9;
        "played/_source" = 9;
        points = 17;
        "points/_source" = 17;
        team = "http://www.extratime.ie/squads/100504/";
        "team/_source" = "/squads/100504/";
        "team/_text" = "Galway United FC";
    },
            {
        played = 9;
        "played/_source" = 9;
        points = 16;
        "points/_source" = 16;
        team = "http://www.extratime.ie/squads/29/";
        "team/_source" = "/squads/29/";
        "team/_text" = "St. Patrick's Ath";
    },
            {
        played = 8;
        "played/_source" = 8;
        points = 15;
        "points/_source" = 15;
        team = "http://www.extratime.ie/squads/30/";
        "team/_source" = "/squads/30/";
        "team/_text" = "Cork City";
    },
            {
        played = 8;
        "played/_source" = 8;
        points = 15;
        "points/_source" = 15;
        team = "http://www.extratime.ie/squads/3/";
        "team/_source" = "/squads/3/";
        "team/_text" = "Shamrock Rovers";
    },
            {
        played = 9;
        "played/_source" = 9;
        points = 10;
        "points/_source" = 10;
        team = "http://www.extratime.ie/squads/13/";
        "team/_source" = "/squads/13/";
        "team/_text" = "Finn Harps";
    },
            {
        played = 9;
        "played/_source" = 9;
        points = 10;
        "points/_source" = 10;
        team = "http://www.extratime.ie/squads/2/";
        "team/_source" = "/squads/2/";
        "team/_text" = Bohemians;
    },
            {
        played = 9;
        "played/_source" = 9;
        points = 7;
        "points/_source" = 7;
        team = "http://www.extratime.ie/squads/8/";
        "team/_source" = "/squads/8/";
        "team/_text" = "Sligo Rovers";
    },
            {
        played = 9;
        "played/_source" = 9;
        points = 7;
        "points/_source" = 7;
        team = "http://www.extratime.ie/squads/6/";
        "team/_source" = "/squads/6/";
        "team/_text" = "Bray Wanderers";
    },
            {
        played = 9;
        "played/_source" = 9;
        points = 5;
        "points/_source" = 5;
        team = "http://www.extratime.ie/squads/109/";
        "team/_source" = "/squads/109/";
        "team/_text" = "Wexford Youths";
    },
            {
        played = 9;
        "played/_source" = 9;
        points = 5;
        "points/_source" = 5;
        team = "http://www.extratime.ie/squads/15/";
        "team/_source" = "/squads/15/";
        "team/_text" = "Longford Town";
    }
);

} 我正在尝试将“played”、“points”和“team/_text”结果推送到每个标签。

【问题讨论】：

标签： ios json swift uitableview alamofire

【解决方案1】：

由于问题范围很广，这里没有具体说明问题是什么，一般的步骤是：

1) 将您的 json 映射到字典/nsdictionary。假设您发布的 JSON sn-p 是一段 JSONArray，格式如下 [{}]，您只需：

var arrayOfDictionaries:NSArray = NSJSONSerialization.JSONObjectWithData(yourData, options: nil, error: nil) as! NSArray

yourData 变量是从网络下载的转换为 NSData 格式的数据

2) 在您的自定义 tableViewCell 中为这三个标签创建出口

3) 对于每个单元格，在里面设置这些标签

func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath)

方法如下：

func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
  let cell:YourCustomCell = tableView.dequeueReusableCellWithIdentifier("Cell", forIndexPath: indexPath) as YourCustomCell
  cell.firstLabel.text = yourDictionary["played"]
  cell.secondLabel.text = yourDictionary["points"]
  cell.thirdLabel.text = yourDictionary["team"]
  return cell
}

4) 我想您将需要更多的单元格而不是一个，然后将许多字典存储在数组中并像这样访问每个元素：

cell.firstLabel.text = arrayOfDictionaries[indexPath.row]["played"]

【讨论】：

觉得可以，试试看
好的，请回来提供反馈，如果您觉得有帮助，请接受答案
yourData 将您下载的数据，在这种情况下 response.data 作为 NSData，后者进入 func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath)，正如我在回答中所说的
声明一个名为 myData:NSData 的类变量，然后在视图中确实加载了 response.data 并在序列化 json 的函数中使用它。你需要自己努力解决这个问题。我真的发布了你需要知道的一切来完成它。请多一些耐心，自己尝试，因为很难重现整个问题
是的，我完全理解这一点，无需抱歉，但我鼓励您在此线程之外进行更广泛的搜索，例如“未解析的标识符 ios 是什么意思”等。我希望您明白我的意思 :)

【解决方案2】：

您需要创建UITableViewCell 的子类，例如MyTableViewCell 并添加一个名为JSON 的属性。

现在，由于您可能正在使用 Interface Builder 来定义您的单元格及其重用标识符（“Cell”），请将该单元格的类设置为您新创建的 MyTableViewCell 并将标签连接到您新创建的 IBOutlets定义类。

然后，当您调用“dequeueReusableCellWithIdentifier”时，将单元格转换为 MyTableViewCell 并将其 JSON 属性设置为您希望在单元格中具有的值。您可能希望对更改做出反应，因此添加 didSet 属性观察器。

var JSON:[String: AnyObject] = [String: AnyObject]() {
    didSet {
        print("populate your labels with your new data");
    }
}

【讨论】：

【解决方案3】：

首先，您应该创建一个模型，其中包含要保存的 3 个属性，例如：

    class Data {
    var team = ""
    var point = 0
    var teamText = ""

    init(fromJSON json: NSDictionary) {
        team = json["team"] as! String
        point = json["points"] as! Int
        teamText = json["team/_text"] as! String
    }
}

在您的 LeagueTableController 中，创建一个数组来保存数据并将其显示给 tableView：

var data = [Data]()

配置tableView来显示数据：

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

func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCellWithIdentifier("Cell", forIndexPath: indexPath) as! YourCustomCell
    let row = indexPath.row
    cell.lblA.text = data[row].team
    cell.lblB.text = "\(data[row].point)"
    cell.lblC.text = data[row].teamText
    return cell
}

最后，将您的响应 json 解析为我们的数据数组以显示到 tableView 上

@IBOutlet weak var tableView: UITableView!
var data = [Data]()

override func viewDidLoad() {
    super.viewDidLoad()

    Alamofire.request(.GET, "https://api.import.io/store/connector/88c66c----9b01-6bd2bb--d/_query?input=webpage/url:----") .responseJSON { response in // 1
        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)")
            // parse JSON to get array of data
            let array = JSON["results"] as! [NSDictionary]
            // map an item to a data object, and add to our data array
            for item in array {
                self.data.append(Data(fromJSON: item))
            }
            // after mapping, reload the tableView
            self.tableView.reloadData()
        }
    }
}

希望对您有所帮助！

【讨论】：

你可以在这里发布你的响应 JSON 吗？