SpriteGroups.js

// SpriteGroups.js was created by Not Quite Black and White for the upcoming point and click adventure This is No Time for Games
// but the script can be used in your Unity projects, license free.
// If you want to find out more about This is No Time for Games please visit ThisisNoTimeforGames.com

// This script is for editing the colour, sorting layer and sorting order of a group of sprite renderers simultaneously.
// Multiple groups of sprite renderers can be contained within the variable "spriteGroups" and edited separately in the editor.
// To allow the sprite groups to be edited at runtime too, just delete the if (!(Application.isPlaying)) on lines 38, 25 and 24.

// For instructions on use please attach this to a game object and see the tooltips in the inspector.

#pragma strict

import System.Collections.Generic;

@script ExecuteInEditMode()
public class SpriteGroups extends MonoBehaviour
{
    @Tooltip ("To create a new group of sprites that can be edited simultaneously, click the arrow and type the number of groups of sprites you want to create into the field.")
    public var spriteGroups : List.<SpriteGroupInfo>;

    #if UNITY_EDITOR
    public function Update()
    {
        if (!(Application.isPlaying))
        {
            if (spriteGroups != null)
            {
                for (var i=0; i < spriteGroups.Count; i++)
                {
                    for (var j=0; j < spriteGroups[i].spriteRendererList.Count; j++)
                    {
                        if (spriteGroups[i].updateColour) spriteGroups[i].spriteRendererList[j].color = spriteGroups[i].colour;
                        if (spriteGroups[i].updateSortingLayer) spriteGroups[i].spriteRendererList[j].sortingLayerName = spriteGroups[i].sortingLayer;
                        if (spriteGroups[i].updateSortingOrder) spriteGroups[i].spriteRendererList[j].sortingOrder = spriteGroups[i].sortingOrder;
                    }
                }
            }
        }
    }
    #endif

    // Set colour at runtime e.g. SetColour(0, Color.black);
    public function SetColour(spriteGroupsIndex : int, colour : Color)
    {
        if (spriteGroups != null)
        {
            if (spriteGroups.Count >= spriteGroupsIndex + 1)
            {
                for (var i=0; i < spriteGroups[spriteGroupsIndex].spriteRendererList.Count; i++)
                {
                    spriteGroups[spriteGroupsIndex].spriteRendererList[i].color = colour;
                }
            }
        }
    }

    // Set sorting layer at runtime e.g SetSortingLayer(0, "Default");
    public function SetSortingLayer(spriteGroupsIndex : int, sortingLayer : String)
    {
        if (spriteGroups != null)
        {
            if (spriteGroups.Count >= spriteGroupsIndex + 1)
            {
                for (var i=0; i < spriteGroups[spriteGroupsIndex].spriteRendererList.Count; i++)
                {
                    spriteGroups[spriteGroupsIndex].spriteRendererList[i].sortingLayerName = sortingLayer;
                }
            }
        }
    }

    // Set sorting order at runtime e.g SetSortingOrder(0, 10);
    public function SetSortingOrder(spriteGroupsIndex : int, sortingOrder : int)
    {
        if (spriteGroups != null)
        {
            if (spriteGroups.Count >= spriteGroupsIndex + 1)
            {
                for (var i=0; i < spriteGroups[spriteGroupsIndex].spriteRendererList.Count; i++)
                {
                    spriteGroups[spriteGroupsIndex].spriteRendererList[i].sortingOrder = sortingOrder;
                }
            }
        }
    }
}

public class SpriteGroupInfo
{
    @Tooltip ("Set the colour for this sprite group.")
    public var colour : Color = Color.white;
    @Tooltip ("Set the sorting layer for this sprite group.")
    public var sortingLayer : String;
    @Tooltip ("Set the sorting order for this sprite group.")
    public var sortingOrder : int;
    @Tooltip ("The sprite group: Drag game objects that have sprite renderers attached from the hierarchy into this list.")
    public var spriteRendererList : List.<SpriteRenderer>;
    @Tooltip ("Do you want to update the colour of this sprite group?")
    public var updateColour : boolean = false;
    @Tooltip ("Do you want to update the sorting layer of this sprite group?")
    public var updateSortingLayer : boolean = false;
    @Tooltip ("Do you want to update the sorting order of this sprite group?")
    public var updateSortingOrder : boolean = false;
}