Wanting make a shop system. I am stuck with script to make a button not to click again once click.

Unity Engine
2

If you post a code snippet, ALWAYS USE CODE TAGS:

How to use code tags: Using code tags properly

Generally, separate processing of the button click itself (the “intent”) from doing the work (the “action”).

  • always gather the click of the button

  • if you CAN do it (logic located far away from the button), then do the action

  • if you cannot do it, then don’t do it, or perhaps make a different sound

Once you have that working, then you can easily make something else to control this field on the button: