接收到的 json 数据是 531 字节的形式，并在 swift 4.1 和 Xcode 9.2 中给出 curruptedData 错误

Posted 2023-02-23

【中文标题】接收到的 json 数据是 531 字节的形式，并在 swift 4.1 和 Xcode 9.2 中给出 curruptedData 错误

【英文标题】：Received json data is in form of 531 bytes and giving curruptedData error in swift 4.1 and Xcode 9.2

【发布时间】：2018-04-25 09:39:42

【问题描述】：

我正在尝试使用 Swift 4.1 和 Xcode 9.2 从服务器获取 JSON 形式的响应。但是 JSONDecoder 接收到的 JSON 数据正在打印 531 bytes 并给出错误

dataCorrupted(Swift.DecodingError.Context(codingPath: [], debugDescription: "The given data was not valid JSON.", underlyingError: Optional(Error Domain=NSCocoaErrorDomain Code=3840"JSON 文本没有以数组或对象以及允许未设置片段的选项。" UserInfo=NSDebugDescription=JSON 文本未以数组或对象开头，以及允许未设置片段的选项。)))

我的请求任务是

let itemUrl = URL(string: mainUrl.MainUrl + "viewallstore")
 let foodUrl = URLRequest(url: itemUrl!)
URLSession.shared.dataTask(with: foodUrl)  (data, response, error) in
            print(data ?? "Errrrr")
            if data != nil 
                do 
                    let storeDetails = try JSONDecoder().decode(AllStores.self, from: data!)
                    for store in storeDetails.StoreDetails 
                                           self.foods.append(FoodCourt(storeId: store.str_id, storeNo: store.str_number, storeName: store.str_name, storePhone: store.str_phone, storeParking: store.str_parking, storeOpenTime: store.str_open_time, storeCloseTime: store.str_close_tie, storeStartdate: store.str_open_date, storeCloseDate: store.str_close_date, storeLogoPath: store.str_logo_path, storeLogoFileName: store.str_logo_file_name, storeStatus: store.status, storeCategory: store.str_cat, createdAt: store.create_at, storeZone: store.str_zone, storeAvailability: store.str_availability, storeMulCategory: store.str_multiple_cat))
                    
                catch let error 
                    self.toastNeck(message: "\(error)")
                    print(error)
                    DispatchQueue.main.async
                                            myActivityIndicator.stopAnimating()
                                            myActivityIndicator.hidesWhenStopped = true
                                        
                
                DispatchQueue.main.async 
                    self.collectionViewFoodCourt.reloadData()
                    
            

        .resume()

我的结构是

struct AllStores: Decodable

    let StoreDetails: [StoreDetail]



struct StoreDetail: Decodable 
    let str_id: String
    let str_number: String
    //let tid : String?  //tid
    let str_name: String
    let str_phone: String
    let str_parking: String
    let str_open_time: String
    let str_close_tie: String
    let str_open_date: String
    let str_close_date: String
    let str_logo_path: String
    let str_logo_file_name: String
    let status: String
    let str_cat: String
    let create_at: String
    let str_zone: String
    let str_availability: String
    let str_multiple_cat: String

    enum CodingKey: String 
        case str_id = "str_id"
        case str_number = "str_number"
        //case tid = "tid"
        case str_name = "str_name"
        case str_phone = "str_phone"
        case str_parking = "str_parking"
        case str_open_time = "str_open_time"
        case str_close_tie = "str_close_tie"
        case str_open_date = "str_open_date"
        case str_close_date = "str_close_date"
        case str_logo_path = "str_logo_path"
        case str_logo_file_name = "str_logo_file_name"
        case status = "status"
        case str_cat = "str_cat"
        case create_at = "create_at"
        case str_zone = "str_zone"
        case str_availability = "str_availability"
        case str_multiple_cat = "str_multiple_cat"
    

我在服务器上的 json 文件是

    "StoreDetails": [
        
            "str_id": "1",
            "str_number": "0",
            "tid": "",
            "str_name": "Moti mahal",
            "str_des": "",
            "str_phone": "9540011581",
            "str_add": "",
            "str_parking": "Ground Floor",
            "str_short_dis": "Moti Mahal",
            "str_open_time": "10:00:00",
            "str_close_tie": "23:00:00",
            "str_open_date": "2017-01-29",
            "str_close_date": "2018-01-28",
            "str_logo_path": "",
            "str_logo_file_name": "Moti mahal.png",
            "status": "Y",
            "str_cat": "1",
            "company_id": "0",
            "str_lat": "0",
            "str_lon": "0",
            "create_at": "2017-02-11 19:45:28",
            "create_by": "0",
            "str_zone": "1",
            "str_floor": "0",
            "str_availability": "1",
            "str_multiple_cat": "1"
        ,
        
            "str_id": "2",
            "str_number": "0",
            "tid": "",
            "str_name": "Ever Green",
            "str_des": "",
            "str_phone": "9953487923",
            "str_add": "",
            "str_parking": "Green Floor",
            "str_short_dis": "Snakes",
            "str_open_time": "10:00:00",
            "str_close_tie": "22:00:00",
            "str_open_date": "2017-02-05",
            "str_close_date": "2017-12-31",
            "str_logo_path": "",
            "str_logo_file_name": "Ever Green.jpg",
            "status": "N",
            "str_cat": "1",
            "company_id": "0",
            "str_lat": "0",
            "str_lon": "0",
            "create_at": "2018-01-15 22:20:11",
            "create_by": "0",
            "str_zone": "1",
            "str_floor": "0",
            "str_availability": "1",
            "str_multiple_cat": "1"
        
]

相同的 json 文件在 android 中运行良好，但在 ios 中无法运行。我被困在这里很长时间了。 *** 上的所有其他问题都表明我的 JSON 文件无效，但它在其他地方工作。

注意。如果有任何问题，请随时编辑我的问题。

我已经解决了所有类似的问题，但没有一个在我的场景中起作用。

【问题讨论】：

在catch let error 范围内，执行let dataString = String.init(data:data, encoding: .utf8) 并检查它是否真的有效。这可能是由于您没有在请求中放入某些标头，例如专门要求 JSON。

@Larme 出现错误：

这很正常。然后检查 URL。

@Larme 正如我之前提到的，该网址在 Android Project 和 Postman 中有效。

邮递员可能会在标题中添加自己接受 application/json 等内容...

【参考方案1】：

解决了问题，只需要在 URL 中添加 POST 请求

foodUrl.httpMethod = "POST"