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一个类用于存储获取的用户登陆信息，让这个类实现NSCoping Protocol。然后实现协议里面的
required init?(coder aDecoder: NSCoder)方法和 func encodeWithCoder(aCoder: NSCoder)方法。然后就可以用
let data = NSKeyedArchiver.archivedDataWithRootObject(someObj)方法得到NSData对象,可以直接写入文件，或者直接NSStardardDefaults.setValue()方法，就可以序列化了
代码备忘：
import UIKit
class UserInfo:NSObject,NSCoding{
private let iconkey = "iconkey"
private let nicknamekey="nicknamekey"
private let aboutMekey="aboutmekey"
private let statuskey="statuskey"
var icon:String
var name:String
var aboutMe:String
var statustext:String
init(dict:[String:AnyObject]) {
self.icon = ""
self.name = ""
self.aboutMe = ""
self.statustext = ""
super.init()
setValuesForKeysWithDictionary(dict)
}
override func setValue(value: AnyObject?, forUndefinedKey key: String) {
//
}
func encodeWithCoder(aCoder: NSCoder){
aCoder.encodeObject(icon, forKey: iconkey)
aCoder.encodeObject(name, forKey: nicknamekey)
aCoder.encodeObject(aboutMe, forKey: aboutMekey)
aCoder.encodeObject(statustext,forKey: statuskey)
}
required init?(coder aDecoder: NSCoder){
self.icon = aDecoder.decodeObjectForKey(iconkey) as! String
self.name = aDecoder.decodeObjectForKey(nicknamekey) as! String
self.aboutMe = aDecoder.decodeObjectForKey(aboutMekey) as! String
self.statustext = aDecoder.decodeObjectForKey(statuskey) as! String
}// NS_DESIGNATED_INITIALIZER
let ui:UserInfo = UserInfo(dict: dict);
let data = NSKeyedArchiver.archivedDataWithRootObject(ui)
ud.setValue(data, forKey: LoginInfo);
读取的时候用下面的
if let userinfo = NSKeyedUnarchiver.unarchiveObjectWithData(NSUserDefaults.standardUserDefaults().objectForKey(LoginInfo) as! NSData) as? UserInfo{
(self.view.viewWithTag(100) as! UIImageView).yy_setImageWithURL(NSURL(string: userinfo.icon), options: YYWebImageOptions.ProgressiveBlur);
(self.view.viewWithTag(101) as! UILabel).text = userinfo.name;
(self.view.viewWithTag(102) as! UILabel).text = userinfo.aboutMe;
(self.view.viewWithTag(103) as! UILabel).text = userinfo.statustext;
}
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原文地址：http://www.cnblogs.com/alexmercer/p/5617118.html
