swift 基础学习一

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1. 利用NSUserDefaults存储用户名和密码

（1）获取用户名和密码

 userTextFeild.text = NSUserDefaults.standardUserDefaults().valueForKey("userName") as! String!        passWordTextFeild.text = NSUserDefaults.standardUserDefaults().valueForKey("password") as! String!

（2）存储用户名和密码

// MARK: 点击事件    func loginButtonClick(sender: UIButton!)    {        print("UISlider Vaule: \(sender.tag)")                if userTextFeild.text == "ww" && passWordTextFeild.text == "123456"        {            NSUserDefaults.standardUserDefaults().setObject(userTextFeild.text, forKey: "userName")            NSUserDefaults.standardUserDefaults().setObject(passWordTextFeild.text, forKey: "passWord")            NSUserDefaults.standardUserDefaults().synchronize()                        let rootVC = TFTabBarViewController()            self.navigationController!.pushViewController(rootVC, animated: false)        }                else        {           let alertView = UIAlertView()           alertView.title = "提示"           alertView.message = "账户或密码输入错误"           //alertView.addButtonWithTitle("我知道了")           alertView.addButtonWithTitle("确定")           alertView.cancelButtonIndex=0           alertView.delegate=self;           alertView.show()        }    }

2. UIButton 初始化

 let loginButton = UIButton(frame: CGRectMake(10, 240, 300, 40))        loginButton.setTitle("登录", forState:UIControlState.Normal)        loginButton.backgroundColor = UIColor.redColor()        loginButton.tag = 999        loginButton.addTarget(self, action: "loginButtonClick:", forControlEvents: UIControlEvents.TouchUpInside)        self.view.addSubview(loginButton)

3. UIImageView初始化，以及在它上面添加图片

 let backButton = UIButton(frame: CGRectMake(0, 12, 70, 44))        backButton.addTarget(self, action: "backBtn:", forControlEvents: UIControlEvents.TouchUpInside)        self.view.addSubview(backButton)               let arrowView=UIImageView(image:UIImage(named:"icon-driver-zhaohuo-back.png"))       arrowView.frame=CGRectMake(0, 12, 50, 35)       backButton.addSubview(arrowView)

4. UILabel初始化

 titleLable = UILabel(frame: CGRectMake(0,25,self.view.frame.size.width, 30))        titleLable.text = title as String        titleLable.textAlignment = NSTextAlignment.Center        titleLable.font=UIFont(name:"Thonburi",size:18)        titleLable.backgroundColor = UIColor.clearColor()        self.navigationView.addSubview(titleLable);

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