如何在请求正文 iOS swift 中发送 JSON 对象数组作为参数值

Question

我正在使用发票生成器 API JSON 输入 https://invoice-generator.com/developers#json-input。 在 API 文档中提到 items 键采用 JSON 对象数组作为值。

这是我对身体的快速字典表示：

let parameters: [String: Any] = [
        "from":"Invoiced, Inc.",
        "to": "Acme, Corp.",
        "logo":"https://invoiced.com/img/logo-invoice.png",
        "number":1,
        "items":["name":"starter plan",
                 "quantity":1,
                "unit_cost":99],
        "notes":"Thanks for your business!"
    ]

问题是当我发送一个空项目数组时，我收到了发票并将其显示在 PDFView 中

item:[]

但是当我发送数组中的某些值时，我从服务器得到无效响应。

如何发送 JSON 对象数组作为 API 请求正文中项目键的值？

Answer 1

您需要将对象编码为 JSON。首先，您应该创建对象：

struct JSONParameters {
    let from: String
    let to: String
    let logo: String
    let number: Int
    // ... all other parameters
}

然后，将其编码为 JSON 并将其添加到请求正文中：

            do {
                let parameters = JSONParameters(from: "Invoiced Inc.", to:......)   // Complete object
                let json = try JSONEncoder().encode(parameters)
                print("Encoded JSON: \(String(data: json, encoding: .utf8)!)")

                var request = URLRequest(url: yourURLHere)
                request.httpBody = json

                let (data, response) = try await URLSession.shared.data(for: request) // Or whatever function you need to use

                // Manage response

            } catch {
                print("\n-->> Error trying to encode : \(error) - \(String(describing: parameters))")
            }

Answer 2

输出：-

[
    "number": 1,
    "to": "Acme, Corp.",
    "notes": "Thanks for your business!",
    "from": "Invoiced, Inc.",
    "logo": "https://invoiced.com/img/logo-invoice.png",
    "items": [
        ["quantity": 1, "name": "Starter plan", "unit_cost": 99],
        ["quantity": 1, "name": "Starter plan2", "unit_cost": 99]
    ]
]

struct BodyModel: Codable {
    var from, to: String?
    var logo: String?
    var number: Int?
    var items: [Item]?
    var notes: String?
    
    func toDict() -> [String:Any] {
        var dictionary = [String:Any]()
        if from != nil {
            dictionary["from"] = from
        }
        if to != nil {
            dictionary["to"] = to
        }
        if logo != nil {
            dictionary["logo"] = logo
        }
        if number != nil {
            dictionary["number"] = number
        }
        if items != nil {
            var arrOfDict = [[String:Any]]()
            for item in items! {
                arrOfDict.append(item.toDict())
            }
            dictionary["items"] = arrOfDict
        }
        if notes != nil {
            dictionary["notes"] = notes
        }
        return dictionary
    }
}

struct Item: Codable {
    var name: String?
    var quantity, unit_cost: Int?
    
    func toDict() -> [String:Any] {
        var dictionary = [String:Any]()
        if name != nil {
            dictionary["name"] = name
        }
        if quantity != nil {
            dictionary["quantity"] = quantity
        }
        if unit_cost != nil {
            dictionary["unit_cost"] = unit_cost
        }
        return dictionary
    }
}

class ViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
        
        var arrItems = [Item]()
        arrItems.append(Item(name: "Starter plan", quantity: 1, unit_cost: 99))
        arrItems.append(Item(name: "Starter plan2", quantity: 1, unit_cost: 99))
        
        let body = BodyModel(from: "Invoiced, Inc.",
                             to: "Acme, Corp.",
                             logo: "https://invoiced.com/img/logo-invoice.png",
                             number: 1,
                             items: arrItems,
                             notes: "Thanks for your business!")
        
        let parameters: [String: Any]  = body.toDict()
        print(parameters)
        
    }
}