Question

我是新来的任何想法。如何从json对象初始化结构。我无法弄清楚我该怎么做。

{ ＆＃34;用户＆＃34;：{ ＆＃34; name＆＃34;：＆＃34; cruskuaka＆＃34;，＆＃34;电子邮件＆＃34;：＆＃34; cristlika@gmail.com"，＆＃34; PHONENO＆＃34;：＆＃34; 018833455＆＃34; }，＆＃34;地址＆＃34;：{ ＆＃34; house＆＃34;：＆＃34; 100＆＃34;，＆＃34; street＆＃34;：＆＃34; B＆＃34;，＆＃34;镇＆＃34 ;: { ＆＃34; town_id＆＃34;：＆＃34; 1＆＃34;，＆＃34; town_name＆＃34;：＆＃34;戈尔韦市中心＆＃34; }，＆＃34;城市＆＃34 ;: { ＆＃34; city_id＆＃34;：＆＃34; 10＆＃34;，＆＃34; city_name＆＃34;：＆＃34;戈尔韦＆＃34; }，＆＃34; ADDRESS_ID＆＃34;：＆＃34; 200＆＃34 ;, ＆＃34; full_address＆＃34;：＆＃34; 100，B，戈尔韦市中心，戈尔韦＆＃34; }，＆＃34; delivery_instruction＆＃34;：＆＃34;没有电话＆＃34;，＆＃34; delivery_method＆＃34;：＆＃34; 1＆＃34; }

此处所有结构 ：

struct Contact  {
    let user : User
    let address : Address
    let deliveryInstruction : String
    let deliveryMethod : String
    init(dictionary: [String: Any]) {
        self.deliveryInstruction = dictionary["delivery_instruction"] as? String ?? ""
        self.deliveryMethod = dictionary["delivery_method"] as? String ?? ""
        self.address = Address(dictionary: dictionary["address"] as? [String:Any] ?? [:])
        self.user =  User(dictionary: dictionary["address"] as? [String:Any] ?? [:])
    }
  }

struct User {
    let name : String
    let email : String
    let phoneNo : String
    init(dictionary : [String:Any] ) {
        self.name = dictionary["name"] as? String ?? ""
        self.email = dictionary["email"] as? String ?? ""
        self.phoneNo = dictionary["phoneNo"] as? String ?? ""
    }
}

struct Address  {
    let city : City
    let town : Town
    let addressId : String
    let fullAddress : String
    let house : String
    let street: String
    init(dictionary : [String:Any] ) {
        self.addressId = dictionary["address_id"] as? String ?? ""
        self.fullAddress = dictionary["full_address"] as? String ?? ""
        self.house = dictionary["house"] as? String ?? ""
        self.street = dictionary["street"] as? String ?? ""
        self.city = City(dictionary: dictionary["address"] as? [String:Any] ?? [:])
        self.town = Town(dictionary: dictionary["address"] as? [String:Any] ?? [:])  
    }
}

struct City {
    let cityId : String
    let cityName : String
    init(dictionary : [String:Any] ) {
        self.cityId = dictionary["city_id"] as? String ?? ""
        self.cityName = dictionary["city_name"] as? String ?? ""
    }
}

struct Town {
    let townId : String
    let townName : String
    init(dictionary : [String:Any]) {
        self.townId = dictionary["town_id"] as? String ?? ""
        self.townName = dictionary["town_name"] as? String ?? ""
    }
}

Answer 1

您的代码中有多个错误，但您处于正确的路径中。初始化用户，城市和城镇结构时，您使用了错误的密钥。我还创建了两个初始化程序，因此您可以使用字典，json字符串或仅使用其数据初始化结构：

struct Contact: CustomStringConvertible  {
    let user: User
    let address: Address
    let deliveryInstruction: String
    let deliveryMethod: String
    // customize the description to your needs
    var description: String { return "\(user.name) \(deliveryInstruction) \(deliveryMethod)" }
    init(dictionary: [String: Any]) {
        self.deliveryInstruction = dictionary["delivery_instruction"] as? String ?? ""
        self.deliveryMethod = dictionary["delivery_method"] as? String ?? ""
        self.address = Address(dictionary: dictionary["address"] as? [String: Any] ?? [:])
        self.user =  User(dictionary: dictionary["user"] as? [String: Any] ?? [:])
    }
    init?(data: Data) {
        guard let json = (try? JSONSerialization.jsonObject(with: data)) as? [String: Any] else { return nil }
        self.init(dictionary: json)
    }
    init?(json: String) {
        self.init(data: Data(json.utf8))
    }

}

struct User: CustomStringConvertible {
    let name: String
    let email: String
    let phone: String
    let description: String
    init(dictionary: [String: Any]) {
        self.name = dictionary["name"] as? String ?? ""
        self.email = dictionary["email"] as? String ?? ""
        self.phone = dictionary["phoneNo"] as? String ?? ""
        self.description = "name: \(name) - email: \(email) - phone: \(phone)"
    }
}

struct Address: CustomStringConvertible  {
    let id: String
    let street: String
    let house: String
    let city: City
    let town: Town
    let description: String
    init(dictionary: [String: Any] ) {
        self.id = dictionary["address_id"] as? String ?? ""
        self.description = dictionary["full_address"] as? String ?? ""
        self.house = dictionary["house"] as? String ?? ""
        self.street = dictionary["street"] as? String ?? ""
        self.city = City(dictionary: dictionary["city"] as? [String: Any] ?? [:])
        self.town = Town(dictionary: dictionary["town"] as? [String: Any] ?? [:])
    }
}

struct City: CustomStringConvertible {
    let id: String
    let name: String
    // customize the description to your needs
    var description: String { return name }
    init(dictionary: [String: Any] ) {
        self.id = dictionary["city_id"] as? String ?? ""
        self.name = dictionary["city_name"] as? String ?? ""
    }

}

struct Town: CustomStringConvertible {
    let id: String
    let name: String
    // customize the description to your needs
    var description: String { return name }
    init(dictionary: [String: Any]) {
        self.id = dictionary["town_id"] as? String ?? ""
        self.name = dictionary["town_name"] as? String ?? ""
    }
}

从JSON测试初始化：

let json = "{\"user\": {\"name\": \"crst\",\"email\": \"crat@gmail.com\",\"phoneNo\":\"018833455\"},\"address\": {\"house\": \"100\",\"street\": \"B\",\"town\":{\"town_id\": \"1\",\"town_name\": \"Galway city center\"},\"city\":{\"city_id\": \"10\",\"city_name\": \"Galway\"},\"address_id\":\"200\", \"full_address\":\"100, B, Galway city center,Galway\" },\"delivery_instruction\": \"no call\",\"delivery_method\": \"1\" }"


let contact = Contact(json: json)   // crst no call 1

contact               // crst no call 1
contact?.user         // name: crst - email: crat@gmail.com - phone: 018833455
contact?.user.name    //  "crst"
contact?.user.email   //  "crat@gmail.com"
contact?.user.phone   //  "018833455"
contact?.address      //  100, B, Galway city center,Galway
contact?.address.id           //  200
contact?.address.street       //  B
contact?.address.town         // Galway city center
contact?.address.city         //  Galway
contact?.deliveryInstruction  // "no call"
contact?.deliveryMethod       //    1

如何从json对象

1 个答案: