為什么JSON回應沒有被決議？

我正在使用 URLSession 進行 API 呼叫，我收到如下錯誤：無法讀取資料，因為它的格式不正確我不知道為什么會這樣。即使我能夠以字串格式列印回應，但不會被決議。

API calling method

func getDashboardCountReq() {
    guard let url = URL(string: urlString) else {
        return
    }
    var request = URLRequest(url: url)
    request.httpMethod = "GET"
    request.addValue("application/json", forHTTPHeaderField: "content-type")
    
    let userDetails = UserInfo.shared.getCurrentUserDetails()
    
    if let authToken = userDetails?.authToken {
        let headers = ["Content-Type": "application/json",
            "Authorization": "Bearer "   authToken]
        request.allHTTPHeaderFields = headers
    }
    
    URLSession.shared.dataTask(with: request) { (data,response,error) in
        do {
            
            if let data = data {
                let responseString = String(data: data, encoding: String.Encoding(rawValue: String.Encoding.utf8.rawValue))
                print("responseString \(responseString)")
                
                do {
                    let f = try JSONDecoder().decode([DashboardResponseData].self, from: data)
                    print(f.count)
                    
                } catch {
                    print("1232 \(error.localizedDescription)")
                }
                
                
            } else {
                print("LoginViewModel-> no data found")
            }
        } catch(let error) {
            print("Error A123 \(error.localizedDescription)")
        }
    }.resume()
    
}

// 模型

struct DashboardResponseData: Codable, Identifiable {
    let id = UUID()
    var approvedrc: String
    var pendingpo: String?
    var assets: String?
    var approvedprs: String?
    var pendingrc: String?
    var approvedpo: String?
    var pendingprs: String?
    var tickets: String?
    
    enum CodingKeys: String, CodingKey {
        case approvedrc = "approvedrc"
        case pendingpo  = "pendingpo"
        case approvedprs = "approvedprs"
        case pendingrc    = "pendingrc"
        case approvedpo = "approvedpo"
        case pendingprs = "pendingprs"
        case tickets = "tickets"
    }
}

字串回應

[{\"approvedrc\":41,\"pendingpo\":566,\"assets\":37956,\"approvedprs\":1040,\"pendingrc\":8,\"approvedpo\":1650,\"pendingprs\":1709,\"tickets\":137872}]

// 日志

uj5u.com熱心網友回復：

如前所述，您的資料是Int，并且您還缺少assetsCodingKeys 中的資料。嘗試這樣的事情：

struct DashboardResponseData: Codable, Identifiable {
    let id = UUID()
    let approvedrc, pendingpo, assets, approvedprs: Int?
    let pendingrc, approvedpo, pendingprs, tickets: Int?
    
    enum CodingKeys: String, CodingKey {
        case approvedrc,pendingpo,assets,approvedprs,pendingrc,approvedpo,pendingprs,tickets
    }
}

uj5u.com熱心網友回復：

中的所有值DashboardResponseData都宣告為字串，但在 JSON 中是整數，因此您應該將它們決議為Int，或者在 JSON 中為它們添加引號。

它在那里作業：

import Foundation

let json = "[{\"approvedrc\":41,\"pendingpo\":566,\"assets\":37956,\"approvedprs\":1040,\"pendingrc\":8,\"approvedpo\":1650,\"pendingprs\":1709,\"tickets\":137872}]"

struct DashboardResponseData: Codable, Identifiable {
    let id = UUID()
    var approvedrc: Int
    var pendingpo: Int?
    var assets: Int?
    var approvedprs: Int?
    var pendingrc: Int?
    var approvedpo: Int?
    var pendingprs: Int?
    var tickets: Int?
    
    enum CodingKeys: String, CodingKey {
        case approvedrc = "approvedrc"
        case pendingpo  = "pendingpo"
        case approvedprs = "approvedprs"
        case pendingrc    = "pendingrc"
        case approvedpo = "approvedpo"
        case pendingprs = "pendingprs"
        case tickets = "tickets"
    }
}


let f = try JSONDecoder().decode([DashboardResponseData].self, from: json.data(using: .utf8)!)
print(f.count)

另外，請注意，您可以簡化此操作：

let responseString = String(data: data, encoding: String.Encoding(rawValue: String.Encoding.utf8.rawValue))

這完全是多余的（String.Encoding(rawValue: String.Encoding.utf8.rawValue))可以簡單地String.Encoding.utf8）：

let responseString = String(data: data, encoding: .utf8)

因為列舉型別String.Encoding被扣除，因為它是這個引數的預期型別。

標籤：IOSjson迅速

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