Initial

UnityProject/Assets/!ext/Standard Assets/Utility/EventSystemChecker.cs

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+using System;
+using System.Collections;
+using UnityEngine;
+using UnityEngine.EventSystems;
+
+public class EventSystemChecker : MonoBehaviour
+{
+    //public GameObject eventSystem;
+
+	// Use this for initialization
+	void Awake ()
+	{
+	    if(!FindObjectOfType<EventSystem>())
+        {
+           //Instantiate(eventSystem);
+            GameObject obj = new GameObject("EventSystem");
+            obj.AddComponent<EventSystem>();
+            obj.AddComponent<StandaloneInputModule>().forceModuleActive = true;
+        }
+	}
+}