var button = UIButton(type:UIButtonType.system)
//var button = UIButton(type:UIButtonType.custom)
//button.setImage(UIImage(named:"圖片名"), for: UIControlState.init(rawValue: 0))
        button.frame=CGRect(x:Int(screen_width-70), y:100+80*3+60, width:50, height:30)
        button.setTitle("登入", for: UIControlState.init
 
(rawValue: 0))
        button.setTitleColor(UIColor.init(red: 236/255.0, green: 145/255.0, blue: 24/255.0, alpha: 1.0), for: UIControlState.init(rawValue: 0))
        button.backgroundColor=UIColor.clear
        button.addTarget(self, action: #selector(self.pushToLogin), for: UIControlEvents.touchUpInside)
        //帶引數的寫法
        //button.addTarget
 
(self, action:#selector(selectQuestion(_:)), for: UIControlEvents.touchUpInside)
        button.titleLabel?.font=UIFont.systemFont(ofSize: 12)
        self.view.addSubview(button)



func pushToLogin(){
    }


//帶引數的寫法
//func selectQuestion(_ sender:UIButton){
}