swift 3中只需要来自json的键（状态）和值（0）
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【中文标题】swift 3中只需要来自json的键（状态）和值（0）【英文标题】：need only key(Status) and value(0) from json in swift 3 【发布时间】：2017-07-01 15:18:57 【问题描述】：
"items": [
"startTime": "1498667581661",
"endTime": "1498667821661",
"dateTime": "2017-06-28T16:33:01.661Z",
"totalTime": "4",
"auctionName": "Bbbb",
"status": 1,
"id": "4760417733705728",
"kind": "auctionTimeApi#resourcesItem"
,
"startTime": "1498772812087",
"endTime": "1498772992087",
"dateTime": "2017-06-29T21:46:52.087Z",
"totalTime": "3",
"auctionName": "sdasdasdd",
"status": 1,
"id": "5080491044634624",
"kind": "auctionTimeApi#resourcesItem"
,
"startTime": "1498833895423",
"endTime": "1498834375423",
"dateTime": "2017-06-30T14:44:55.423Z",
"totalTime": "8",
"auctionName": "Boston",
"status": 1,
"id": "5085211482128384",
"kind": "auctionTimeApi#resourcesItem"
,
"startTime": "1498767894987",
"endTime": "1498768254987",
"dateTime": "2017-06-29T20:24:54.987Z",
"totalTime": "6",
"auctionName": "Dfddd",
"status": 0,
"id": "5111065843073024",
"kind": "auctionTimeApi#resourcesItem"
,
"startTime": "1498640043323",
"endTime": "1498640283323",
"dateTime": "2017-06-28T08:54:03.323Z",
"totalTime": "4",
"auctionName": "Andsda",
"status": 1,
"id": "5118511437316096",
"kind": "auctionTimeApi#resourcesItem"
,
"startTime": "1498807228606",
"endTime": "1498807348606",
"dateTime": "2017-06-30T07:20:28.606Z",
"totalTime": "2",
"auctionName": "Dxf",
"status": 1,
"id": "5146118144917504",
"kind": "auctionTimeApi#resourcesItem"
,
"startTime": "1498806518484",
"endTime": "1498807358484",
"dateTime": "2017-06-30T07:08:38.484Z",
"totalTime": "14",
"auctionName": "rrrtttt",
"status": 1,
"id": "5151952589553664",
"kind": "auctionTimeApi#resourcesItem"
,
"startTime": "1498807683483",
"endTime": "1498807863483",
"dateTime": "2017-06-30T07:28:03.483Z",
"totalTime": "3",
"auctionName": "wwew",
"status": 1,
"id": "5956451503702016",
"kind": "auctionTimeApi#resourcesItem"
,
"startTime": "1498803576630",
"endTime": "1498803816630",
"dateTime": "2017-06-30T06:19:36.630Z",
"totalTime": "4",
"auctionName": "zzzz",
"status": 0,
"id": "5964732200648704",
"kind": "auctionTimeApi#resourcesItem"
,
"startTime": "1498833083854",
"endTime": "1498833563854",
"dateTime": "2017-06-30T14:31:23.854Z",
"totalTime": "8",
"auctionName": "Dartmouth",
"status": 0,
"id": "6314781967384576",
"kind": "auctionTimeApi#resourcesItem"
],
"kind": "auctionTimeApi#resources",
"etag": "\"l-71RhD3VMYkQ-s_W643oBlpkCw/1SZlmWzcSB8XxEnhJpjVvwPV5k4\""
以上是我在 Google 云中的 JSON 数据 添加这是我的 SWIFT3 代码：
import UIKit
class ViewController: UIViewController , UITableViewDataSource
@IBOutlet weak var auctionLabel: UILabel!
@IBOutlet weak var auctionTableView: UITableView!
var fetchAuctionName = [AuctionName]()
override func viewDidLoad()
super.viewDidLoad()
auctionTableView.dataSource = self
parseData()
override var prefersStatusBarHidden: Bool
return true
public func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int
return fetchAuctionName.count
public func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell
let cell = auctionTableView.dequeueReusableCell(withIdentifier: "cell")
cell?.textLabel?.text = fetchAuctionName[indexPath.row].auctionname
cell?.detailTextLabel?.text = fetchAuctionName[indexPath.row].auctionname
return cell!
func parseData()
fetchAuctionName = []
let url = "urll"
var request = URLRequest(url: URL(string: url)!)
request.httpMethod = "GET"
let configuration = URLSessionConfiguration.default
let session = URLSession(configuration: configuration, delegate: nil, delegateQueue: OperationQueue.main)
let task = session.dataTask(with: request) (data, response, error) in
if (error != nil)
print("Error")
else
do
let fetchData = try JSONSerialization.jsonObject(with: data!, options: .mutableContainers) as! NSDictionary
let jsonArray = fetchData.value(forKey: "items") as! NSArray
for eachFetchedAuctionName in jsonArray
let eachAuctionName = eachFetchedAuctionName as! [String : Any]
let auctionname = eachAuctionName["auctionName"] as! String
self.fetchAuctionName.append(AuctionName(auctionname: auctionname));
self.auctionTableView.reloadData()
catch
print("Error 2")
task.resume()
class AuctionName: NSObject
var auctionname : String
init(auctionname : String)
self.auctionname = auctionname
使用此代码，我可以打印 JSON 数据中的所有状态值
我的问题是；我只需要打印状态值为 0 的那些。如何修改我的代码来实现这一点？
【问题讨论】：
使用 nspredicate . 感谢您抽出宝贵时间.. 顺便说一句，我认为我们不需要 nspredicate。只要声明就足够了。任何方式感谢您的时间 【参考方案1】：试试这个
func parseData()
fetchAuctionName = []
let url = "urlllll"
var request = URLRequest(url: URL(string: url)!)
request.httpMethod = "GET"
let configuration = URLSessionConfiguration.default
let session = URLSession(configuration: configuration, delegate: nil, delegateQueue: OperationQueue.main)
let task = session.dataTask(with: request) (data, response, error) in
if (error != nil)
print("Error")
else
do
let fetchData = try JSONSerialization.jsonObject(with: data!, options: .mutableContainers) as! NSDictionary
let jsonArray = fetchData.value(forKey: "items") as! NSArray
for eachFetchedAuctionName in jsonArray
let eachAuctionName = eachFetchedAuctionName as! [String : Any]
let auctionname = eachAuctionName["auctionName"] as! String
if let status = eachAuctionName["staus"] as? Bool
if status == true
self.fetchAuctionName.append(AuctionName(auctionname: auctionname));
self.auctionTableView.reloadData()
catch
print("Error 2")
task.resume()
【讨论】：
感谢您的重播.. 但我用这段代码解决了它并且它的工作。 if(eachAuctionName["status"] as! Int == 0) self.fetchAuctionName.append(AuctionName(auctionname:auctionname)); 【参考方案2】： for eachFetchedAuctionName in jsonArray
let eachAuctionName = eachFetchedAuctionName as! [String : Any]
let auctionname = eachAuctionName["auctionName"] as! String
self.fetchAuctionName.append(AuctionName(auctionname: auctionname));
// you can typecast to either String or an Int and then compare it respectively
//with a String "1" or an Int(1), whichever suits your app
guard let status = eachAuctionName["status"] as! Int else return
if status == 0
print("0 found")
一个建议：使用 swift 4 Decodable 协议，将 JSON 轻松解析为您选择的结构或类的自定义对象，使代码看起来干净整洁。
【讨论】：
条件绑定的初始化程序必须有可选类型而不是'字符串' 我收到了这个错误！！！ 感谢您的重播.. 但我用这段代码解决了它并且它的工作。 if(eachAuctionName["status"] as! Int == 0) self.fetchAuctionName.append(AuctionName(auctionname:auctionname)); 是的，正如我所说，这取决于您的应用程序如何解析它，无论是字符串还是整数，我会更新我的答案，请接受它。以上是关于swift 3中只需要来自json的键（状态）和值（0）的主要内容，如果未能解决你的问题，请参考以下文章
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