Making a Popup and Closable Panel in Unity 5

script:

public GameObject thePanel;

public open()

{

     thePannel.SetActive(true);

}

public open()

{

     thePannel.SetActive(false);

}

and add the up script to an Empty Object

add open/close button on the scene.

define open/close button onClick() function to call script‘s open/close function.

Unity Panel open & close

原文：http://www.cnblogs.com/wiessharling/p/5401349.html