Code not working in build

I've made a script to handle buttons for my game UI. The posted section of the script resizes the background of the button based on text length. It works perfectly in the editor testing, but when I make a build, the code stops working.

Code (CSharp):

1. void Start()
2.     {
3.             text = GetComponent<Text>();
4.             rect = GetComponent<RectTransform>();
5.  
6.             TextAnchor currentAncor = text.alignment;
7.             text.alignment = TextAnchor.UpperCenter;
8.  
9.             float width = CalculateLengthOfMessage(text.text) - 520f;
10.             float offsetX = width / 2 - 2f;
11.  
12.             text.alignment = currentAncor;
13.  
14.             float centeredOffset = text.alignment == TextAnchor.UpperLeft ? width / 8 : 0;
15.  
16.             transform.GetChild(0).localScale = new Vector3(width * 2, transform.GetChild(0).localScale.y, 1);
17.             transform.GetChild(0).localPosition = new Vector3(centeredOffset, 0, 0);
18.             transform.GetChild(1).localPosition = new Vector3(centeredOffset - offsetX, 1.9f, 0);
19.             transform.GetChild(2).localPosition = new Vector3(centeredOffset + offsetX, 1.9f, 0);
20.  
21.             transform.GetComponent<BoxCollider>().size = new Vector3(width + 520f, 360f, 1f);
22.     }
23.  
24. int CalculateLengthOfMessage(string message)
25.     {
26.         int totalLength = 0;
27.  
28.         Font myFont = text.font;  //chatText is my Text component
29.         CharacterInfo characterInfo = new CharacterInfo();
30.  
31.         char[] arr = message.ToCharArray();
32.  
33.         foreach (char c in arr)
34.         {
35.             myFont.GetCharacterInfo(c, out characterInfo, text.fontSize);
36.  
37.             totalLength += characterInfo.advance;
38.         }
39.  
40.         return totalLength;
41.     }
42.  

 

Where do you set the text in the text object?

 

I set the text in the editor.

 

The only thing I can think of is for some reason, the text isn't there when this code runs. Doesn't seem correct to me, but I'm assuming this code is running which just means something else is off.

I suggest using something like https://assetstore.unity.com/packages/tools/integration/log-viewer-12047 and adding some debug messages to print out some values in your code so you can see what they are in the build and make sure you are getting what you should be getting. (you can compare them to the editor).

This will also assure you that code is running as it should be.

 

The problem is likely your use of the magic number 520 in line 9.

If that is intended to map to "half the width of the screen," then use Screen.width / 2 instead.

If it is intended to map to something else, use the Canvas or some other interim RectTransform object to obtain that dimension at runtime. It's unlikely the target will run at a constant dimension or that this dimension will match your editor window.

I see you use other magic numbers such as 520 and 360 and even 1.9f... those might be causing problems too.