How do i change a color of an individual alphabet of a UI.Text

Questions & Answers
1

Hello devs Good Evening/Morning.
I want to change a color of an individual alphabet of UI Text from scrip using tags of rich color, following is the snippet code I’m trying to get it done with ` void OnCollisionEnter2D(Collision2D col)
{
if (col.gameObject.tag == “Player”)
{
// Destroy(col.gameObject);
char cubealphabet=gameObject.GetComponent().alphabet.text[0];
Debug.Log(cubealphabet);
string currentword = GameObject.Find(“GameController”).GetComponent().currentword;
//Debug.Log(“current word from destroyer”+GameObject.Find(“GameController”).GetComponent().currentword);
if (GameObject.Find(“GameController”).GetComponent().wordbank.checkalphabet(currentword, cubealphabet) == true)
{
Debug.Log(“accurate alphabet”);
GameObject.Find(“GameController”).GetComponent().highlightalphabet(cubealphabet);

        }
        else
        {
            Debug.Log("Incorrect alphabet");
        }
        Destroy(gameObject);
    }
}
`the variable cubealphabet just takes a single letter from the gameobject it is on,and it is sent to highlightalphabet function to change its color, following is the snippet code of highlighalphabet function
 public void highlightalphabet(char colalpha)
    {
        
        int alphabetindex = wordfield.text.IndexOf(colalpha);
        Debug.Log("Alphabet index is " + alphabetindex);
        if (alphabetindex == -1)
            return;
        char coloredalpha=wordfield.text[alphabetindex];
        //wordfield.text = "";
        for (int i = 0; i <= wordfield.text.Length - 1; i++)
        {
            //wordfield.text +=currentword*;*

if(i==alphabetindex)
wordfield.text+= “<color=#FF0000>” + coloredalpha + “”;
}

}
the problem here is , I can’t seem to access an individual character in text with it’s respective index
like this
wordfield.text*=“”+coloredalpha+“”;*
the error i face here is “can not implicitly convert type string to char”
pardon if the question isn’t elaborated enough, but the bottom line is, I can’t apply richtext properties to an individual alphabets of UI.text.

2

You can use StringBuilder for this sort of thing. You would need to add
using System.Text;
to your script and then do something like this:

public void highlightalphabet(char colalpha)
{
    StringBuilder strBuilder = new StringBuilder(wordfield.text);
    strBuilder.Replace(colalpha.ToString(), "<color=#FF0000>" + colalpha + "</color>");
    wordfield.text = strBuilder.ToString();
}

This is a really simple example that changes the color of all characters in a string that match the “colalpha” char. It gets more difficult if you want to do things like remove the color change, or change the color of previously altered text, but it’s not too hard.

3

@Ahndrakhul thank you very much, it did a great job but the problem with it is, it replaces all the occurrences of specified character, my scenario is, let there be a word “Moon”, alphabets are floating and user hits ‘o’ both of those o’s are highlighted where as i want just one highlighted o for a single hit, another ‘o’ has to be highlighted when user hits the o for second time.