iOS 如何使用 Alamofire 解析 JSON 可编码数组

发布于09月04日

我正在try 用AlamoFire从服务器上解析数据.

(我已经试了两天了，但失败了.) 我怎样才能用Alamofire得到Json数组可编码类型？

接口:不，不，不.

[ { "姓名":"无名氏"， "Email":"johndoe@gmail.com"， "type":"Lattee"， "Size":"中等" }, { "姓名":"无名氏"， "Email":"doe@gmail.com"， "type":"Lattee"， "Size":"小" } ]

这是我的代码

在Model.SWIFT中

struct OrderList : Codable{
    var list : [Order]
}

enum coffeeType: String, Codable{
    case cappuccino
    case lattee
    case espressino
    case cortado
    
}
enum coffeeSize: String, Codable{
    case small
    case medium
    case large
    
    enum CodingKeys: String, CodingKey {
        case small = "s"
        case medium = "m"
        case large = "l"
    }
}
struct Order: Codable {
    let email: String!
    let name : String!
    let size : coffeeSize!
    let type : coffeeType!
    
    enum CodingKeys: String, CodingKey{
        case name = "Name"
        case email = "Email"
        case type  = "Type"
        case size  = "Size"
    }

    init(from decoder: Decoder) throws {
        let values = try decoder.container(keyedBy: CodingKeys.self)
        email = try values.decodeIfPresent(String.self, forKey: .email) ?? ""
        name  = try values.decodeIfPresent(String.self, forKey: .name)  ?? "Guest"
        size  = try values.decodeIfPresent(coffeeSize.self, forKey: .size) ?? .small
        type  = try values.decodeIfPresent(coffeeType.self, forKey: .type) ?? .lattee
    }
}

struct Resource<T: Codable> {
    let url       : URL
    var httpMethod: HTTPMethod = .get
}

我用不同的格式定义了它，比如响应数据、响应JSON和响应编码，但是我总是得不到任何东西，或者缺少一些东西. 我知道如何使用ResponseJSON进行解析.但我想试着通过应用可编码的. 这太难了.

-数据解析


func load<T>(resource: Resource<T>, completion: @escaping (Result<T, NetworkError>) -> Void) {
        let call = AF.request(myurl,method: resource.httpMethod, parameters: nil).responseJSON{ response in
            switch response.result {
            case .success(let data):
                if let JSON = response.value {
                    do{
                       let dataJson = try JSONSerialization.data(withJSONObject: JSON, options: [])
                        let getInstanceData = try JSONDecoder().decode(T.self, from: dataJson)
                        print(getInstanceData)
                        completion(.success(getInstanceData))
                        
                    }catch{
                        print(error)
                    }
                }
            case .failure(_):
                
                break
            }
        }
    }

struct Order: Codable { let email: String let name : String let size : CoffeeSize let type : CoffeeType init(from decoder: Decoder) throws { let values = try decoder.container(keyedBy: CodingKeys.self) email = try values.decodeIfPresent(String.self, forKey: .email) ?? "" name = try values.decodeIfPresent(String.self, forKey: .name) ?? "Guest" size = try values.decode(CoffeeSize.self, forKey: .size) type = try values.decode(CoffeeType.self, forKey: .type) } } enum CoffeeType: String, Codable { case cappuccino case latte case espressino case cortado init(from decoder: Decoder) throws { let label = try decoder.singleValueContainer().decode(String.self) let lowercaseLabel = label.lowercased() self = CoffeeType(rawValue: lowercaseLabel) ?? .latte } } enum CoffeeSize: String, Codable { case small case medium case large }

func readJsonFile(filename: String) -> String { guard let fileUrl = Bundle.main.url(forResource: filename, withExtension: "json") else { fatalError() } guard let jsonData = try? String(contentsOf: fileUrl) else { return "" } return jsonData } enum CoffeeType: String, Codable { case cappuccino case latte case espressino case cortado init(from decoder: Decoder) throws { let label = try decoder.singleValueContainer().decode(String.self) let lowercaseLabel = label.lowercased() self = CoffeeType(rawValue: lowercaseLabel) ?? .latte } } enum CoffeeSize: String, Codable { case small case medium case large } struct Order: Codable { let email: String let name : String let size : CoffeeSize let type : CoffeeType init(from decoder: Decoder) throws { let values = try decoder.container(keyedBy: CodingKeys.self) email = try values.decodeIfPresent(String.self, forKey: .email) ?? "" name = try values.decodeIfPresent(String.self, forKey: .name) ?? "Guest" size = try values.decode(CoffeeSize.self, forKey: .size) type = try values.decode(CoffeeType.self, forKey: .type) } } func parseJsonFile() { let jsonStr = readJsonFile(filename: "data") let jsonData: Data = Data(jsonStr.utf8) let decoder = JSONDecoder() do { let orders = try decoder.decode([Order].self, from: jsonData) orders.forEach { print("\($0.name)" + " - " + "\($0.type.rawValue)" + " - " + "\($0.size.rawValue)") } } catch { print(error.localizedDescription) } } parseJsonFile()

iOS 如何使用 Alamofire 解析 JSON 可编码数组

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