Change The Alpha Of A Button In C# Script?

Hi,

I am trying to change the alpha of a button in C# script.
Is the above possible, if yes then please provide an example...
Thanks!

Jesse

 

Here is the script I have attached to the button(it compiles, but does nothing?):

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4. public class ScreenFadeScript : MonoBehaviour {
5.    // Use this for initialization
6.    void Start () {
7.        Globals.ScreenFadeAlpha = 255;
8.        Globals.ScreenFadeStatus = Globals.ScreenFadingIn;
9.    }
10.    // Update is called once per frame
11.    void Update () {
12.        if (Globals.ScreenFadeStatus == Globals.ScreenFadingIn)
13.        {
14.            if (Globals.ScreenFadeAlpha > 0)
15.            {
16.                Globals.ScreenFadeAlpha-=1;
17.                Color tmp = GetComponent<UnityEngine.UI.Image>().color;
18.                tmp.a = Globals.ScreenFadeAlpha;
19.                GetComponent<SpriteRenderer>().color = tmp;
20.            }
21.        }
22.    }
23. }
24.  

 

hi,

please not that the Color struct is using float values, not bytes.
For Alpha it means:
- a value of 0 is invisible
- a value of 1 is opaque
- everything greater than 1 is clamped to one.