1、本人使用swift4.1，弄了一晚上才弄好，結(jié)果還是一個小問題真是尷尬， 要在model中每個屬性前面加上@objc

import UIKit

classUserModel: NSObject {

? @objc var dix = String()

}

?let dic = ["dix":"ffffff"] as NSDictionary

? ? ? ? let model =UserModel.mj_object(withKeyValues: dic)!

? ? ? ? print(model.dix)