如何将 Json 数据推送到 UITableView 中的标签?
Posted
技术标签:
【中文标题】如何将 Json 数据推送到 UITableView 中的标签?【英文标题】:How do I push Json data to labels in a UITableView? 【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】:
【参考方案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 :) 【参考方案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】:
【参考方案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?以上是关于如何将 Json 数据推送到 UITableView 中的标签?的主要内容,如果未能解决你的问题,请参考以下文章
如何有效地将压缩的 json 数据推送到 azure 事件中心并在 azure 流分析中处理?
如何将空 JSON 数据推送到 Observable<any[]> angular 2 类型的数组字段
将 UIViewController 推送到 UINavigationController 时动画挂起