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swift 弹出提示框

    func showMsgbox(_message: String, _title: String = "提示"){
        
        let alert = UIAlertController(title: _title, message: _message, preferredStyle: UIAlertControllerStyle.alert)
        let btnOK = UIAlertAction(title: "好的", style: .default, handler: nil)
        alert.addAction(btnOK)
        self.present(alert, animated: true, completion: nil)
        
    }
    
    @IBAction func btnLoginClick(_ sender: Any) {

        if tvName.text == ""{


            showMsgbox(_message: "请输入帐号")


            return


        }


        if tvPassword.text == ""{


            showMsgbox(_message: "请输入密码")


            return


        }


    }

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swift 弹出提示框