ClickObject.cs

using UnityEngine;
using UnityEngine.UI;
using System.Collections;

public class ClickObject : MonoBehaviour {

    public bool click = false;
    public GameObject UIObject;

    void Start () {
        UIObject.SetActive(false);
    }

    void Update () {
        if (click == true) {
            Debug.Log("UIObject = true");
            UIObject.SetActive(true);
        }
        else UIObject.SetActive(false);
    }

    void OnMouseDown() {
        if (click == false) {
            Debug.Log("Click = true");
            click = true;
        }
    }

    public void HideUI() {
        Debug.Log("Click = false, UIObject = false");
        click = false;
    }
}