備注：swift4.0 需要在類的上面加上@objcMembers猬错，否者會報錯
1饥漫、定義屬性
var code : String?
var png : String?
var chs : String?
2、自定義構(gòu)造函數(shù)
init(dict : [String : String]) {
super.init()
setValuesForKeys(dict)
}
override func setValue(_ value: Any?, forUndefinedKey key: String) {}
3妹孙、重新description方法
override var description: String {
return dictionaryWithValues(forKeys: ["code","png","chs"]).description
}
