koobas.hobune.stream
How to restrict user from typing certain numbers in input field
Hey. I'm creating some sort of a numeration system and I don't want the user to type certain numbers, say for example I don't want the user to type the number 8 inside the input field, how do I do this through code or inside the editor?
In your script you can only process the valid digits, based on what is valid at the time. Throw invalid ones away.
Sorry for the slow replay back. In my case I am using the Input.inputString() method, so the user has to enter the response and use the Enter key. I then check the list of valid responses for my current state and act on it if it is valid and show the list of valid response if it is not and wait for a now response.
If you are using Input.GetKeyDown() I am not sure how you could consume an invalid key, but probably doing a KeyKeyDown() for all the possible invalid keys would do that. So handle all digits, but have some way to flag which are the valid keys. That will likely consume the invalid keys as well as the valid keys and you don't process the invalid ones or issue a beep for them to let the user know they are invalid.
Either you handle the not allowed digits inside a separate if-statement and you show an error message in the UI or you only handle only the once that are allowed. For better user experience I recommend to do the first. How to retrieve the pressed key on the keyboard you find in the docs: https://docs.unity3d.com/ScriptReference/Input.GetKeyDown.html
You should look into using regular expressions https://www.c-sharpcorner.com/article/c-sharp-regex-examples/ It is much easier to control if the number of chars you want to disallow increases
