Version: 2017.3
public UI.Graphic targetGraphic ;


Graphic that will be transitioned upon.

using UnityEngine;
using System.Collections;
using UnityEngine.UI; // Required when Using UI elements.

public class ExampleClass : MonoBehaviour { public Image newImage; public Button btnMain;

void SomeFunction() { //Displays the sprite transitions on the image when the transition to Highlighted,pressed or disabled is made. btnMain.targetGraphic = newImage; } }