character restriction

Question

var text : string ;

function OnGUI () { GUI.skin.settings.cursorColor = Color.red; var chr : char = Event.current.character; if ( (chr < 'a' || chr > 'z') && (chr < 'A' || chr > 'Z') && (chr < '0' || chr > '9') ) { Event.current.character = '\0'; } text = GUI.TextField(new Rect(100,100,100,30), text,10); }

Assets/NewBehaviourScript.js(10,17): BCE0044: unexpected char: '''. error is coming can u rectify it

Answer 1

Best Answer

Answer by Statement · Mar 09, 2011 at 01:12 PM

I don't get that error mate, but I do get:

BCE0018: The name 'string' does not denote a valid type ('not found').

var text : string; // Should be String, not string.

Then I get further errors:

BCE0051: Operator '<' cannot be used with a left hand side of type 'char' and a right hand side of type 'String'.
BCE0051: Operator '>' cannot be used with a left hand side of type 'char' and a right hand side of type 'String'.

I replaced the if-test to:

if ( !char.IsLetterOrDigit(chr) )

BCE0022: Cannot convert 'String' to 'char'.

Event.current.character = '\0';

This one was a bit more tricky. It seems (I am not a JS coder really) that you can't set characters with '. I set it to 0 instead. I tried out the modified code and it seems to work. (Another way to set the character would been Event.current.character = "\0"[0];)

Here's the whole deal:

var text : String;

function OnGUI () 
{
    GUI.skin.settings.cursorColor = Color.red;
    var chr : char = Event.current.character;
    if ( !char.IsLetterOrDigit(chr) ) 
    {
        Event.current.character = 0;
    }
    text = GUI.TextField(new Rect(100,100,100,30), text,10);
}

Add comment · Show 3 · Share

robert 3 · Mar 09, 2011 at 02:35 PM 0

Share

can u please tell how above code work i am new to unity i tried hard to understand not getting any idea robert 0 secs ago

Statement · Mar 09, 2011 at 02:47 PM 0

Share

char.IsLetterOrDigit is a method that return true if the character is a letter, or if it is a digit. It might also support other characters such as **, so its logic is a bit different from the one you tried to write. So, we're using the ! operator which invert the result from char.IsLetterOrDigit, so the if test reads "if not a letter or digit". Event.current.character = 0 sets the character to value 0 (I am pretty sure it is same as \0). So, in effect, we're filtering out input when the typed character is anything else but a letter or digit.

robert 3 · Mar 09, 2011 at 02:58 PM 0

Share

thanks a lot it is working nicely

character restriction

1 Reply

Your answer

Welcome to Unity Answers

Follow this Question

Related Questions