Changing the alpha of child objects

In my game, whenever the player hits an enemy, they become invulnerable for a few seconds, causing them to be slightly transparent. I used unity's 2D animaton package to rig my character and animate it. I can't figure out how to make the sprites within the object become transparent. Could someone help me?

 

You could get all SpriteRender Components from the animated object and change the material color to something transparent and back.

Something like the following should work:

Code (CSharp):

1. var spriteRenderes = this.GetComponentsInChildren<SpriteRenderer>();
2.         foreach (SpriteRenderer sr in spriteRenderes)
3.         {
4.             sr.sharedMaterial .color = new Color(1,1,1,0.5f);
5.         }

 

It's not working, sadly.

Code (CSharp):

1. public class Invulnerability : MonoBehaviour
2. {
3.     [SerializeField]
4.     private float seconds;
5.  
6.     //Obtain health info
7.     Health health;
8.  
9.     //Function to be invulnerable
10.     public IEnumerator Invulnerable()
11.     {
12.         //Make player ignore enemy layer to not get hurt
13.         Physics2D.IgnoreLayerCollision(9, 12, true);
14.  
15.         //Invulnerable
16.         SetAlpha(.5f);
17.         yield return new WaitForSeconds(seconds);
18.  
19.         //No longer maker player invulnerable
20.         Physics2D.IgnoreLayerCollision(9, 12, false);
21.         SetAlpha(1f);
22.     }
23.  
24.     public void SetAlpha(float alpha)
25.     {
26.         var children = this.GetComponentsInChildren<SpriteRenderer>();
27.  
28.         foreach (SpriteRenderer child in children)
29.         {
30.             child.sharedMaterial.color = new Color(1, 1, 1, alpha);
31.         }
32.     }
33.  
34. }

above is what my code looks like. It works when the object itself has a sprite renderer, but when I tried putting a sprite renderer on the empty object (the parent of the rigged sprite), it didn't do anything.

 

I also tried making a public array of sprite renderers and placed my sprites in that array, but that didn't work either

 

Oh I am sorry it’s child.color, the SpriteRenderer has it. This should work.

 

It still refuses to work : (