objectMapple 是一款在Swift下非常好用的数据转模型工具，类似MJExtension
pod引入工程
pod 'ObjectMapper'
import进行声明导入，并创建数据模型
import ObjectMapper
创建数据模型需要遵守Mapple协议和两个协议方法
struct HousesBaseInfo: Mappable {
init?(map: Map) {
}
mutating func mapping(map: Map) {
}
}
当然也可以用class来创建模型，如果不需要继承的话，建议直接用struct创建模型
根据数据创建模型
首先来看我们的数据，根据数据我们创建模型
let baseInfo: [String : Any] = ["build_name":"置信·原墅",
"build_address":"学院中路与金桥路交汇处东北侧",
"area_address":"浙江省温州市鹿城区五马街道",
"build_num": 12,
"detail_address":["province":"浙江省",
"city":"温州市"]
struct HousesBaseInfo: Mappable {
var build_name: String?
var build_address: String?
var build_num: Int = 0
var detail_address: DetailAddressModel?
init?(map: Map) {
}
mutating func mapping(map: Map) {
build_name <- map["build_name"]
build_address <- map["build_address"]
build_num <- map["build_num"]
detail_address <- map["detail_address"]
}
var description: String {
get {
return Mapper().toJSONString(self, prettyPrint: true)!
}
}
}
struct DetailAddressModel: Mappable {
var province: String?
var city: String?
init?(map: Map) {
}
mutating func mapping(map: Map) {
province <- map["province"]
city <- map["city"]
}
}
<-是一个泛型函数，挺形象的
在description中的Mapper().toJSONString(self, prettyPrint: true)!是为了方便用来打印出来看看解析结果
使用
// 这样就得到了模型
let basedata: HousesBaseInfo = Mapper<HousesBaseInfo>().map(JSONObject: self.baseInfo)!
// 打印出来看看
DPrint(message: basedata.description)
/*
{
"build_name" : "置信·原墅",
"build_address" : "学院中路与金桥路交汇处东北侧",
"detail_address" : {
"city" : "温州市",
"province" : "浙江省"
},
"build_num" : 12
}
*/
注意
使用过程中如果有类型为array最好初始化一个空数组[], 例如
var detail_address: [DetailAddressModel] = []
方便以后用到array属性的时候的转换可选值类型拆包弄得繁琐，还有一些基本类型Int等附上初值，当解析失败得到为nil的时候不会因为强转类型！而崩溃
打Mapper<xxxxModel>().map通过联想可以看到很多构造方法，和返回值类型，常用的有如下，还有很多可以自行选择方法
let model = Mapper<DetailAddressModel>().map(JSONObject: <Any>?)
let model = Mapper<DetailAddressModel>().map(JSONString: <String>?)
let model = Mapper<DetailAddressModel>().mapArray(JSONObject: <Any>?)
let model = Mapper<DetailAddressModel>().mapArray(JSONString: <String>?)
也可以
let model = DetailAddressModel(JSON: )
let model = DetailAddressModel(JSONString: )
