ios - Swift 5:解码嵌套JSON

Question

我在将一些JSON数据解码为结构时遇到了一些麻烦。我已经尝试过以下方法，但它不起作用:

JSON:

{
    "submission_date": "2020-02-28T14:21:46.000+08:00",
    "status": "pending",
    "requestor": {
        "name": "Adam"
    },
    "claim_items": [
        {
            "date": "2020-02-20",
            "description": "TV",
            "currency": "MYR",
            "amount": "103.0",
            "amount_in_ringgit": "10.0"
        },
        {
            "date": "2020-02-20",
            "description": "Netflix",
            "currency": "MYR",
            "amount": "12.0",
            "amount_in_ringgit": "10.0"
        }
    ]
}

结构方法1:

struct ClaimDetail: Decodable {
    let submission_date: String
    let status: String
    let requestor: Requestor
    let claim_items: [ClaimItem]
}

struct Requestor: Decodable {
    let name: String

    init(json: [String:Any]) {
        name = json["name"] as? String ?? ""
    }
}

struct ClaimItem: Decodable {
    let date: String
    let description: String
    let currency: String
    let amount: String
    let amount_in_ringgit: String

    init(json: [String:Any]) {
        date = json["date"] as? String ?? ""
        description = json["description"] as? String ?? ""
        currency = json["currency"] as? String ?? ""
        amount = json["amount"] as? String ?? ""
        amount_in_ringgit = json["amount_in_ringgit"] as? String ?? ""
    }
}

结构方法2:

struct ClaimDetail: Decodable {
    let submission_date: String
    let status: String
    let requestor: Requestor
    let claim_items: [ClaimItem]

    struct Requestor: Decodable {
        let name: String

        init(json: [String:Any]) {
            name = json["name"] as? String ?? ""
        }
    }

    struct ClaimItem: Decodable {
        let date: String
        let description: String
        let currency: String
        let amount: String
        let amount_in_ringgit: String

        init(json: [String:Any]) {
            date = json["date"] as? String ?? ""
            description = json["description"] as? String ?? ""
            currency = json["currency"] as? String ?? ""
            amount = json["amount"] as? String ?? ""
            amount_in_ringgit = json["amount_in_ringgit"] as? String ?? ""
        }
    }
}

结构方法3(通过https://app.quicktype.io/):

// MARK: - ClaimDetail
struct ClaimDetail: Codable {
    let submissionDate, status: String
    let requestor: Requestor
    let claimItems: [ClaimItem]

    enum CodingKeys: String, CodingKey {
        case submissionDate = "submission_date"
        case status, requestor
        case claimItems = "claim_items"
    }
}

// MARK: - ClaimItem
struct ClaimItem: Codable {
    let date, claimItemDescription, currency, amount: String
    let amountInRinggit: String

    enum CodingKeys: String, CodingKey {
        case date
        case claimItemDescription = "description"
        case currency, amount
        case amountInRinggit = "amount_in_ringgit"
    }
}

// MARK: - Requestor
struct Requestor: Codable {
    let name: String
}

URL session

URLSession.shared.dataTask(with: requestAPI) { [weak self] (data, response, error) in
    if let data = data {
        do {
            let json = try JSONDecoder().decode(ClaimDetail.self, from: data)
            print (json)
        } catch let error {
            print("Localized Error: \(error.localizedDescription)")
            print("Error: \(error)")
        }
    }
}.resume()

所有返回以下错误:

本地化错误:由于格式不正确，无法读取数据。
错误:dataCorrupted(Swift.DecodingError.Context(codingPath:[]，debugDescription:“给定的数据不是有效的JSON。”，底层错误:可选(错误域= NSCocoaErrorDomain代码= 3840“字符0周围的值无效。” UserInfo = { NSDebugDescription =字符0周围的值无效。})))

Answer 1

解决方案:
我使用了struct方法＃1，但这不是问题。问题在于我如何解码URLSession中的数据。由于某些原因，这可行:

URLSession.shared.dataTask(with: requestAPI) { [weak self] (data, response, error) in
    
    if let data = data {
    
        do {
            let dataString = String(data: data, encoding: .utf8)
            let jsondata = dataString?.data(using: .utf8)
            let result = try JSONDecoder().decode(ClaimDetail.self, from: jsondata!)
            print(result)
        
        } catch let error {
            print("Localized Error: \(error.localizedDescription)")
            print("Error: \(error)")
        }
    }
}.resume()

屏幕截图:

我不太了解，但我想我必须将数据转换为字符串，然后再对其进行解码？
谢谢大家的帮助。