Unity3d Sprite change with prefabs - unity3d

Question

Ive a question about how to change spirte images during runtime for a bunch of objects.
So i made a tiny racer 2d game, and therefore you can choose differend themes. You have this option in an integraded menu (not a seperate scene).
My question:
Can i switch the sprites easy during the runtime? Ive made prefabs for each track element - and i changed the sprites of those prefabs, but the change only gets visible, after the scene is reloaded. So i would need to avoid this.
Has someone a solution or a hint how i could do that?
Thanks in advance!
Code:
public class Background_Controller : MonoBehaviour {
public Camera mainCamera;
public Color colorNormal;
public GameObject[] Prefabs;
public Sprite[] normalSprites;
public Sprite[] tronSprites;
// Use this for initialization
void Awake () {
SwitchBackgroundFunction();
}
public void SwitchBackground(string Theme)
{
switch(Theme)
{
case "GreenHell":
PlayerPrefs.SetString("Theme", "Normal");
break;
case "NeonCity":
PlayerPrefs.SetString("Theme", "Tron");
break;
}
SwitchBackgroundFunction();
}
private void SwitchBackgroundFunction()
{
int prefabCount = Prefabs.Length;
if (PlayerPrefs.GetString("Theme") == "Normal")
{
mainCamera.backgroundColor = colorNormal;
for (int i = 0; i <= prefabCount - 1; i++)
{
Prefabs[i].GetComponent<SpriteRenderer>().sprite = normalSprites[i];
}
}
if (PlayerPrefs.GetString("Theme") == "Tron")
{
mainCamera.backgroundColor = Color.black;
for (int i = 0; i <= prefabCount - 1; i++)
{
Prefabs[i].GetComponent<SpriteRenderer>().sprite = tronSprites[i];
}
}
}
// Update is called once per frame
void Update () {
}
}

Answer 1

You can do something along the following lines to swap in a sprite from within your resources folder during runtime.
Sprite spr;
spr = Resources.Load<Sprite>("mysprite"); //insert name and file path to sprite within Resources folder
GetComponent<SpriteRenderer>().sprite = spr;