import UIKit

class User: NSObject,NSCopying,NSCoding {

var name = ""
var age = 0

required override init() {
    
}

required init?(coder aDecoder: NSCoder) {
    super.init();
    var count:UInt32 = 0;
    let list = class_copyPropertyList(User.self, &count)
    for i:Int in 0..<Int(count) {
        let property = list![i]
        let key = String.init(cString: property_getName(property))
        self .setValue(aDecoder.decodeObject(forKey: key), forKey: key)
    }
}

func encode(with aCoder: NSCoder) {
    var count:UInt32 = 0;
    let list = class_copyPropertyList(User.self, &count)
    for i:Int in 0..<Int(count) {
        let property = list![i]
        let key = String.init(cString: property_getName(property))
        aCoder .decodeObject(forKey: key)
    }
}
func copy(with zone: NSZone? = nil) -> Any {
    let copyObj = self
    return copyObj
}

override func mutableCopy() -> Any {
    let copyObj = type(of: self).init()
    var count:UInt32 = 0
    let list:UnsafeMutablePointer = class_copyPropertyList(User.self, &count)!
    for i:Int in 0..<Int(count) {
        let property:objc_property_t = list[i]!
        let key = String(cString: ivar_getName(property))
        let obj = self .value(forKey: key)
        copyObj.setValue(obj, forKey: key)
    }
    return copyObj
}

}

我寫了個swift 3 的 ，不知道有沒有問題，有問題可以幫我指出來，謝謝