這篇文章開始介紹如何將Model轉(zhuǎn)成JSON

1.生成JSON和JSONString

struct Car: Convertible {
    var name: String = "Bently"
    var new: Bool = true
    var age: Int = 10
    var area: Float = 0.12345678
    var weight: Double = 0.1234567890123456
    var height: Decimal = 0.123456789012345678901234567890123456789
    var price: NSDecimalNumber = NSDecimalNumber(string: "0.123456789012345678901234567890123456789")
    var minSpeed: Double = 66.66
    var maxSpeed: NSNumber = 77.77
    var capacity: CGFloat = 88.88
    var birthday: Date = Date(timeIntervalSince1970: 1565922866)
    var url: URL? = URL(string: "http://520suanfa.com")
}

let car = Car()

// 將模型實例car轉(zhuǎn)為JSON
let json1 = car.kj.JSONObject()
// 也可以調(diào)用全局函數(shù)`JSONObject(from:)`
let json2 = JSONObject(from: car)

// 將模型實例car轉(zhuǎn)為JSONString
let jsonString1 = car.kj.JSONString()
// 也可以調(diào)用全局函數(shù)`JSONString(from:)`
let jsonString2 = JSONString(from: car)

print("json1:\(json1) json2:\(json2)  jsonString1:\(jsonString1)  jsonString2:\(jsonString2)")
/*
json1:["area": 0.12345678, "minSpeed": 66.66, "url": "http://520suanfa.com", "height": "0.12345678901234569216", "price": "0.123456789012345678901234567890123456789", "new": true, "weight": 0.1234567890123456, "maxSpeed": 77.77, "age": 10, "name": Bently, "capacity": 88.88, "birthday": 1565922866.0] json2:["url": "http://520suanfa.com", "new": true, "weight": 0.1234567890123456, "maxSpeed": 77.77, "area": 0.12345678, "name": Bently, "minSpeed": 66.66, "age": 10, "price": "0.123456789012345678901234567890123456789", "capacity": 88.88, "birthday": 1565922866.0, "height": "0.12345678901234569216"]  jsonString1:{"height":"0.12345678901234569216","capacity":88.88,"minSpeed":66.66,"url":"http:\/\/520suanfa.com","price":"0.123456789012345678901234567890123456789","maxSpeed":77.77,"weight":0.1234567890123456,"birthday":1565922866,"age":10,"name":"Bently","new":true,"area":0.12345678}  jsonString2:{"minSpeed":66.66,"birthday":1565922866,"weight":0.1234567890123456,"height":"0.12345678901234569216","name":"Bently","price":"0.123456789012345678901234567890123456789","maxSpeed":77.77,"capacity":88.88,"url":"http:\/\/520suanfa.com","area":0.12345678,"new":true,"age":10}
*/

/***************************************************/

// 傳入`true`代表生成格式化的JSONString
let jsonString3 = car.kj.JSONString(prettyPrinted: true)
let jsonString4 = JSONString(from: car, prettyPrinted: true)

print("jsonString3:\(jsonString3) jsonString4:\(jsonString4)")
/*
jsonString3:{
  "name" : "Bently",
  "weight" : 0.1234567890123456,
  "capacity" : 88.88,
  "age" : 10,
  "new" : true,
  "maxSpeed" : 77.77,
  "url" : "http:\/\/520suanfa.com",
  "height" : "0.12345678901234569216",
  "minSpeed" : 66.66,
  "area" : 0.12345678,
  "price" : "0.123456789012345678901234567890123456789",
  "birthday" : 1565922866
} jsonString4:{
  "weight" : 0.1234567890123456,
  "new" : true,
  "capacity" : 88.88,
  "maxSpeed" : 77.77,
  "price" : "0.123456789012345678901234567890123456789",
  "minSpeed" : 66.66,
  "url" : "http:\/\/520suanfa.com",
  "name" : "Bently",
  "height" : "0.12345678901234569216",
  "age" : 10,
  "birthday" : 1565922866,
  "area" : 0.12345678
}
*/

2.模型嵌套

struct Book: Convertible {
    var name: String = ""
    var price: Double = 0.0
}

struct Car: Convertible {
    var name: String = ""
    var price: Double = 0.0
}

struct Dog: Convertible {
    var name: String = ""
    var age: Int = 0
}



struct Person: Convertible {
    var name: String = "Jack"
    var car: Car? = Car(name: "Bently", price: 106.666)
    var books: [Book]? = [
        Book(name: "Fast C++", price: 666.6),
        Book(name: "Data Structure And Algorithm", price: 666.6),
    ]
    var dogs: [String: Dog]? = [
        "dog0": Dog(name: "Wang", age: 5),
        "dog1": Dog(name: "ErHa", age: 3),
    ]
}

let jsonString = Person().kj.JSONString(prettyPrinted: true)
print("jsonString:\(jsonString)")
/*
jsonString:{
  "dogs" : {
    "dog0" : {
      "age" : 5,
      "name" : "Wang"
    },
    "dog1" : {
      "age" : 3,
      "name" : "ErHa"
    }
  },
  "name" : "Jack",
  "car" : {
    "price" : 106.666,
    "name" : "Bently"
  },
  "books" : [
    {
      "name" : "Fast C++",
      "price" : 666.6
    },
    {
      "price" : 666.6,
      "name" : "Data Structure And Algorithm"
    }
  ]
}
*/

3. Any

struct Book: Convertible {
    var name: String = ""
    var price: Double = 0.0
}
 
struct Dog: Convertible {
    var name: String = ""
    var age: Int = 0
}
 
struct Person: Convertible {
    // `books`也可以是NSArray\NSMutableArray
    var books: [Any]? = [
        Book(name: "Fast C++", price: 666.6),
        Book(name: "Data Structure And Algorithm", price: 666.6),
    ]
    
    // `dogs`也可以是NSDictionary\NSMutableDictionary
    var dogs: [String: Any]? = [
        "dog0": Dog(name: "Wang", age: 5),
        "dog1": Dog(name: "ErHa", age: 3),
    ]
}
 
let jsonString = Person().kj.JSONString()
/*
 {
     "dogs" : {
         "dog1" : {
             "age" : 3,
             "name" : "ErHa"
         },
         "dog0" : {
             "age" : 5,
             "name" : "Wang"
         }
     },
     "books" : [
         {
             "name" : "Fast C++",
             "price" : 666.6
         },
         {
             "price" : 1666.6,
             "name" : "Data Structure And Algorithm"
         }
     ]
 }
 */

4.Model數(shù)組

struct Car: Convertible {
    var name: String = ""
    var price: Double = 0.0
}

// `models`也可以是NSArray\NSMutableArray
let models = [
    Car(name: "BMW", price: 100.0),
    Car(name: "Audi", price: 70.0),
    Car(name: "Bently", price: 300.0)
]

let jsonString = models.kj.JSONString(prettyPrinted: true)
print("jsonString:\(jsonString)")
/*
jsonString:[
  {
    "price" : 100,
    "name" : "BMW"
  },
  {
    "price" : 70,
    "name" : "Audi"
  },
  {
    "name" : "Bently",
    "price" : 300
  }
]
*/

5.Key處理

struct Dog: Convertible {
    var nickName: String = "Wang"
    var price: Double = 100.6
    
    // 可以通過實現(xiàn)`kj_JSONKey`方法自定義最終生成JSON的key
    func kj_JSONKey(from property: Property) -> JSONPropertyKey {
        switch property.name {
        case "nickName": return "_nick_name_"
        default: return property.name
        }
    }
}

let jsonString = Dog().kj.JSONString(prettyPrinted: true)
print("jsonString:\(jsonString)")
/*
jsonString:{
  "_nick_name_" : "Wang",
  "price" : 100.6
}
*/

6.監(jiān)聽

struct Car: Convertible {
    var name: String = "Bently"
    var age: Int = 10
    
    // 當(dāng)Model即將開始轉(zhuǎn)換為JSON時調(diào)用
    func kj_willConvertToJSON() {
        print("Car - kj_willConvertToJSON")
    }
    
    // 當(dāng)Model轉(zhuǎn)換JSON完畢時調(diào)用
    func kj_didConvertToJSON(json: [String: Any]) {
        print("Car - kj_didConvertToJSON", json)
    }
}

let jsonString = Car().kj.JSONString(prettyPrinted: true)
print("jsonString:\(jsonString)")
/*
Car - kj_willConvertToJSON
Car - kj_didConvertToJSON ["name": Bently, "age": 10]
jsonString:{
  "name" : "Bently",
  "age" : 10
}
*/

Swift 字典轉(zhuǎn)模型(KakaJSON) ---1.基本用法
Swift 字典轉(zhuǎn)模型(KakaJSON) ---2.數(shù)據(jù)類型
Swift 字典轉(zhuǎn)模型(KakaJSON) ---3.key處理
Swift 字典轉(zhuǎn)模型(KakaJSON) ---4.動態(tài)模型
Swift KakaJSON 06.---Coding/歸檔/解檔