Add "1" to score text? Not "11111"?

Question

Hello,

I would like to make a script that adds "1" to a text object every time a sprite is clicked.

When the sprite is clicked, however, it disappears, spawning a new sprite. My problem is that the game thinks that I literally want to add "1" to the text, resulting in "11111" instead of "5".

Main Script Code:

 public class ScoreHandler : MonoBehaviour {
 
     public static ScoreHandler instance;
 
     // Use this for initialization
     void Awake () {
         instance = this;
     }
 
     public Text powerUpMessageCanvas;
 
     // Update is called once per frame
     void Update () {
         
     }
 }

Called from the script on the sprite(s):

 public class DestroyScript : MonoBehaviour {
 
 
     private void OnMouseDown()
     {
         Destroy(gameObject);
         ScoreHandler.instance.powerUpMessageCanvas.text += 1;
     }
 }

Thanks in advance, Aiden

Answer 1

Answer by TimBur · Aug 31, 2018 at 04:59 PM

This is an issue of operators and data types. The same operator can do different things to different data types. Context matters. Specifically, the "+" operator does addition with int and float and double type variables, but it concatinates (glues together) string type variables. And the variable ScoreHandler.instance.powerUpMessageCanvas.text is a string.

What you need is a new variable of type int. You use the int to keep score, and when it changes, you convert the int to a string and copy that string into ScoreHandler.instance.powerUpMessageCanvas.text

 //In ScoreHandler, you create a new variable
 int score = 0;
 
 //When things are destroyed, you change the int in ScoreHandler
 score +=1;
 
 //AND you convert the int to a string, and put the string in the display text
 {stuff}.text = score.ToString();

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Add "1" to score text? Not "11111"?

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