14-Swift中字典转模型

• 字典转模型（初始化时传入字典）
• 字典转模型（利用KVC转化）

一、 普通的字典转模型：

class Person:NSObject{
    var name:String
    var age:Int

    init(dic:[String:AnyObject]) {
        name = (dic["name"] as? String) ?? ""
        age = (dic["age"] as? Int) ?? 0
    }
}
let dic:[String:AnyObject] = ["name":"yijiang" as AnyObject,"age123":19 as AnyObject]
let p = Person(dic: dic)
p.name  //"yijiang"
p.age   //0

二、利用KVC字典转模型：

class Student:NSObject{
    var name:String = ""
    var age:Int = 0

    //KVC：使用KVC之前，必须保证自身初始化完毕，self调用父类的init
    //在KVC之前，必须保证当前对象里面所有的“非可选”属性有值
    init(dic:[String:AnyObject]) {
        super.init()
        setValuesForKeys(dic)
    }

    override func setValue(_ value: Any?, forUndefinedKey key: String) {
        print(value,key)
    }
}
let dic1:[String:AnyObject] = ["name":"yijiang" as AnyObject,"age1":18 as AnyObject]
let s = Student(dic: dic1)
s.age   //0
s.name  //yijiang