Question

if let url = URL(string: "https://mysit.com") {
    URLSession.shared.dataTask(with: url) {
        data, response, error in
        guard
            let httpURLResponse = response as? HTTPURLResponse, httpURLResponse.statusCode == 200,
            let data = data, error == nil,
            let valueEncoding = response?.textEncodingName,
            let getContent = String(data: data, encoding: valueEncoding.textEncodingToStringEncoding)
            else { return }
        print(getContent)

        }.resume()
}

我的数据

{"Regions":null,"Cities":[{"Id":"9605","Name":"YANBAA AS SENAYAH"},{"Id":"15","Name":"ABHA"},{"Id":"13","Name":"AD DAMMAM"},{"Id":"1542","Name":"AL BAHA"},{"Id":"14","Name":"AL MADINAH AL MUNAWWARAH"},{"Id":"2213","Name":"AR'AR"},{"Id":"11","Name":"BURAYDAH"},{"Id":"10","Name":"HAIL"},{"Id":"17","Name":"JAZAN"},{"Id":"6","Name":"MAKKAH AL MUKARRAMAH"},{"Id":"3417","Name":"NAJRAN"},{"Id":"3","Name":"RIYADH"},{"Id":"2237","Name":"SAKAKA"},{"Id":"1","Name":"TABUK"},

如何获取“名称”值的数组列表，您能帮我吗？

Answer 1

您可以尝试

struct Root :Decodable{

    let Cities:[InnerItem]

}

struct InnerItem :Decodable{

    let Id:String

    let Name:String

}

do {

    let arr = try JSONDecoder().decode(Root.self, from: data)

    print(arr.Cities)
}
catch {

    print(error)
}

//

注意：：这是正确的json结构

{“ Regions”：null，“ Cities”：[{“ Id”：“ 9605”，“ Name”：“ YANBAA AS SENAYAH”}，{“ Id”：“ 15”，“ Name”：“ ABHA “}，{” Id“：” 13“，”名称“：” AD DAMMAM“}，{” Id“：” 1542“，”名称“：” AL BAHA“}，{” Id“：” 14“， “名称”：“ AL MADINAH AL MUNAWWARAH”}，{“ Id”：“ 2213”，“名称”：“ AR'AR”}，{“ Id”：“ 11”，“名称”：“ BURAYDAH”}， {“ Id”：“ 10”，“名称”：“ HAIL”}，{“ Id”：“ 17”，“名称”：“ JAZAN”}，{“ Id”：“ 6”，“名称”：“ MAKKAH AL MUKARRAMAH“}，{” Id“：” 3417“，”名称“：” NAJRAN“}，{” Id“：” 3“，”名称“：” RIYADH“}，{” Id“：” 2237“ ，“名称”：“ SAKAKA”}，{“ Id”：“ 1”，“名称”：“ TABUK”}]}

Answer 2

连同解码步骤。我添加了几个防护措施，以在出现错误时打印错误。通常，将错误抛出并在适当的级别进行处理是一种很好的做法。

func work() {
    guard let url = URL(string: "https://mysit.com") else {
        fatalError("url is nil.")
    }

    URLSession.shared.dataTask(with: url) {
        data, response, error in
        guard error == nil else {
            fatalError("\(error!)")
        }
        guard let response = response as? HTTPURLResponse,
            response.statusCode == 200 else {
            fatalError("Response is nil.")
        }
        guard let data = data else {
            fatalError("data is nil.")
        }

        decode(data: data)

    }.resume()
}

func decode(data: Data) {
    let decoder = JSONDecoder.init()
    let welcome = try! decoder.decode(Welcome.self, from: data)

    print(welcome.cities.first!)
}

解码助手。 enum CodingKeys用于将小写属性转换为大写JSON属性并返回。

struct Welcome: Codable {
    var regions: [Region]?
    let cities: [City]

    enum CodingKeys: String, CodingKey {
        case regions = "Regions"
        case cities = "Cities"
    }
}

struct City: Codable {
    let id, name: String

    enum CodingKeys: String, CodingKey {
        case id = "Id"
        case name = "Name"
    }
}

struct Region: Codable {
    let id, name: String

    enum CodingKeys: String, CodingKey {
        case id = "Id"
        case name = "Name"
    }
}

一些使用Quicktype之类的服务将JSON字符串转换为特定的编程语言。它使事情变得更快，更简单。

Answer 3

let responseData = try JSONSerialization.jsonObject(with: (response["Cities"] as! String).data(using: String.Encoding.utf8)!, options: []) as! [[String: Any]]

for item in responseData{
  let name =  item["Name"] as! String
}

如何快速访问项目密钥4

我的数据

3 个答案: