var btn9:UIButton = UIButton(frame: CGRect(x: 50,y: 420,width: 100,height: 35))

btn9.backgroundColor = UIColor.whiteColor()

btn9.setTitle("边框按钮",forState: UIControlState.Normal)

btn9.setTitleColor(UIColor.blackColor(),forState: UIControlState.Normal)

btn9.layer.borderColor = UIColor.blackColor().CGColor

btn9.layer.borderWidth = 1
btn9.layer.cornerRadius = 5
给按钮添加图片：
btn3.setImage(UIImage(named: "btn1"),forState: UIControlState.Normal)

添加点击事件

logout_bt.addTarget(self,action:"logoutAction",forControlEvents: .TouchUpInside)

写对应的方法

func logoutAction(){

print("退出账号")

}

shareBt.alpha = 0.0//隐藏按钮

shareBt.enabled = false//让按钮不能点击