总结：记不住的代码

return 没写在最后  return后面的代码会执行



 //定制navigationBar

        //1.设置背景颜色

        self.navigationBar.barTintColor = UIColor.blackColor()

        

        //2.设置中间的文字颜色

        //NSForegroundColorAttributeName 文字颜色的key

        self.navigationBar.titleTextAttributes = [NSForegroundColorAttributeName:UIColor.whiteColor()]

        

        //3.设置填充颜色

        self.navigationBar.tintColor = UIColor.whiteColor()



 //设置状态栏的颜色为白色
        UIApplication.sharedApplication().statusBarStyle = .LightContent



//        设置背景图片
//        以图片路径的方式获取图片
        bgImgView =  UIImageView.init(frame: self.view.bounds)
        bgImgView.image = UIImage.init(contentsOfFile: NSBundle.mainBundle().pathForResource(bgImgName, ofType: nil)!)





//        设置中间segement
        let segement = UISegmentedControl.init(items: ["消息","电话"])
        segement.frame = CGRectMake(0, 0, 100, 40)
        segement.selectedSegmentIndex = 0
//        设置segement边框颜色
        segement.layer.borderColor = UIColor.whiteColor().CGColor
        segement.layer.borderWidth = 1
//        设置segement背景颜色
//        segement.backgroundColor = UIColor.whiteColor()
        segement.tintColor = UIColor.whiteColor()
        
        
        self.navigationItem.titleView = segement



按钮切圆

 //切圆
        self.centerBtn.layer.masksToBounds = true
        self.centerBtn.layer.cornerRadius = 50



textField的左右视图

let leftImageView1 = UIImageView.init(frame: CGRectMake(0, 0, 40, 50))
        leftImageView1.contentMode = .Center
        leftImageView1.image = UIImage.init(named: "user")
        userField.leftView = leftImageView1
        userField.leftViewMode = .Always
        self.bgView.addSubview(userField)
        userField.delegate = self



 override func touchesBegan(touches: Set, withEvent event: UIEvent?) {
//        self.outHandAnimation()
        self.view.endEditing(true)
    }


//MARK: - 监听键盘的弹起和收起
extension LoginViewController{
    
    func addObserverAction() {
        
        //当键盘弹起和收起的时候，系统会自动通过消息中心去发送相应的消息。
        //UIKeyboardWillShowNotification -> 键盘将要弹起对应的消息名
        //UIKeyboardWillHideNotification -> 键盘将要收起对应的消息名
        NSNotificationCenter.defaultCenter().addObserver(self, selector: "showKeyBoard:", name: UIKeyboardWillShowNotification, object: nil)
        NSNotificationCenter.defaultCenter().addObserver(self, selector: "hideKeyBoard:", name: UIKeyboardWillHideNotification, object: nil)
    }
    
    //键盘弹起
    func showKeyBoard(nof:NSNotification){
        
        
        UIView.animateWithDuration(0.4) {
            
            self.bgView.transform = CGAffineTransformMakeTranslation(0, -110)
        }
        
    }
    
    //键盘收起
    func hideKeyBoard(nof:NSNotification) {
        
        UIView.animateWithDuration(0.4) {
            
            self.bgView.transform = CGAffineTransformMakeTranslation(0, 0)
        }
        
    }



 
        let story = UIStoryboard.init(name: "Register", bundle: nil)
        let register = story.instantiateInitialViewController()
        self.navigationController?.pushViewController(register!, animated: true)