How to match 2 UI objects with Pointer Click?

Hello,

I came up with this solution (using unity 4.6 but it should be close to your version, at least I hope):

So I work with 4 images in the example and I use their name to check if they Match

This is the hierarchie in my scene:

Each image should have this set up :

(You might need to add event->Event Trigger component and UI->selectable) I did it with colors but you can of course set the appropriate sprite to your image. The set-up can all be done from the inspector or via script depending on how you generate your board.

About event trigger: when you click on the image it is selected and it calls the function CheckMatch from GameHandler.cs (see below)

Then I have this script "GameHandler.cs" to check the match between the images (this script can be on any gameobject, in my scene its on camera):

 using UnityEngine;
 using System.Collections;
 using UnityEngine.EventSystems;
 using UnityEngine.UI;
 using System.Collections.Generic;
 
 public class GameHandler : MonoBehaviour {
 
     public EventSystem mySystem;
     public List<Selectable> selectables;
     private GameObject lastSelectedObject;
 
     void Start(){
 
         selectables = Selectable.allSelectables;
 
     }
 
     public void CheckMatch() {
 
 
 
         if (lastSelectedObject == null)
             lastSelectedObject = mySystem.currentSelectedGameObject;
         Debug.Log ("Select & Checking Match..");
 
 
         if (mySystem.currentSelectedGameObject != lastSelectedObject) {
 
             //Debug.Log ("Last Selected : " + lastSelectedObject);
             //Debug.Log("Current Selected : " + mySystem.currentSelectedGameObject);
 
             if (mySystem.currentSelectedGameObject.name == lastSelectedObject.name){
 
                 Debug.Log ("Image Match !");
                 UpdateBoardAfterSuccess();
 
             }
             else{
 
                 Debug.Log ("Images Not Matching");
                 ResetBuffers();
 
             }
 
         }
 
     }
 
     void UpdateBoardAfterSuccess(){
 
         // I brutaly set the whole gameObject to unActive but you could just disable the image component
         lastSelectedObject.SetActive (false);
         mySystem.currentSelectedGameObject.SetActive (false);
         ResetBuffers ();
 
     }
 
     void ResetBuffers(){
 
         lastSelectedObject = null;
         mySystem.SetSelectedGameObject (null);
         
     }
 }

Hope it helps :)