swift NSUserDefaults的基本使用

import UIKit

@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {

    var window: UIWindow?


    func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
        self.window = UIWindow(frame: UIScreen.mainScreen().bounds)
        // Override point for customization after application launch.
        self.window!.backgroundColor = UIColor.whiteColor()
        
        self.window!.rootViewController = RootViewController();
        
        self.window!.makeKeyAndVisible()
        return true
    }
}

import UIKit

class RootViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
        
        let key:String = "isFirst"
        //读取（值不为true，则是第一次登录）
        let isFirst:Bool = NSUserDefaults.standardUserDefaults().boolForKey(key) as Bool!
        print(isFirst)
        //如果是第一次登录存储数据，否则读取数据
        if(isFirst == false){
            print("第一次登录")
            //存储
            NSUserDefaults.standardUserDefaults().setObject(true , forKey: key)
            NSUserDefaults.standardUserDefaults().setObject(1, forKey:"number")
            NSUserDefaults.standardUserDefaults().setObject("甘雨路", forKey: "name")
            //设置同步
            NSUserDefaults.standardUserDefaults().synchronize()
        }else{
            //读取
            let num = NSUserDefaults.standardUserDefaults().objectForKey("number") as! Int
            print(num)
            let name = NSUserDefaults.standardUserDefaults().objectForKey("name") as! String
            print(name)
        }
        
    }

}