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Assets/SampleScenes/Scripts/SlowMoButton.cs

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+using System;
+using UnityEngine;
+using UnityEngine.UI;
+
+namespace UnityStandardAssets.SceneUtils
+{
+    public class SlowMoButton : MonoBehaviour
+    {
+        public Sprite FullSpeedTex;     // the ui texture for full speed
+        public Sprite SlowSpeedTex;     // the ui texture for slow motion mode
+        public float fullSpeed = 1;
+        public float slowSpeed = 0.3f;
+        public Button button;           // reference to the ui texture that will be changed
+
+
+        private bool m_SlowMo;
+
+
+       	void Start()
+        {
+			m_SlowMo = false;
+        }
+
+		void OnDestroy()
+		{
+			Time.timeScale = 1;
+		}
+
+        public void ChangeSpeed()
+        {
+            // toggle slow motion state
+            m_SlowMo = !m_SlowMo;
+
+            // update button texture
+            var image = button.targetGraphic as Image;
+            if (image != null)
+            {
+                image.sprite = m_SlowMo ? SlowSpeedTex : FullSpeedTex;
+            }
+
+            button.targetGraphic = image;
+
+			Time.timeScale = m_SlowMo ? slowSpeed : fullSpeed;
+        }
+    }
+}