Update

Assets/Invector-3rdPersonController/ItemManager/Scripts/vAutoScrollVertical.cs

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+using UnityEngine;
+using UnityEngine.EventSystems;
+using UnityEngine.UI;
+namespace Invector
+{
+    public class vAutoScrollVertical : MonoBehaviour
+    {
+        private ScrollRect sr;
+        RectTransform contentRect;
+
+        public void Awake()
+        {
+            sr = this.gameObject.GetComponent<ScrollRect>();
+            if (sr)
+            {
+                contentRect = sr.content;
+            }
+        }
+
+        void Update()
+        {
+            OnUpdateSelected();
+        }
+
+        public void OnUpdateSelected()
+        {
+            GameObject selected = EventSystem.current.currentSelectedGameObject;
+            if (selected == null || selected.transform.parent != contentRect.transform) return;
+
+            // helper vars
+            float contentHeight = sr.content.rect.height;
+            float viewportHeight = sr.viewport.rect.height;
+
+            // what bounds must be visible?
+            float centerLine = selected.transform.localPosition.y; // selected item's center
+            float upperBound = centerLine + (selected.GetComponent<RectTransform>().rect.height / 2f); // selected item's upper bound
+            float lowerBound = centerLine - (selected.GetComponent<RectTransform>().rect.height / 2f); // selected item's lower bound
+
+            // what are the bounds of the currently visible area?
+            float lowerVisible = (contentHeight - viewportHeight) * sr.normalizedPosition.y - (contentHeight * 0.5f);
+            float upperVisible = lowerVisible + viewportHeight;
+
+            // is our item visible right now?
+            float desiredLowerBound;
+            if (upperBound > upperVisible)
+            {
+                // need to scroll up to upperBound
+                desiredLowerBound = upperBound - viewportHeight + selected.GetComponent<RectTransform>().rect.height;
+            }
+            else if (lowerBound < lowerVisible)
+            {
+                // need to scroll down to lowerBound
+                desiredLowerBound = lowerBound - selected.GetComponent<RectTransform>().rect.height;
+            }
+            else
+            {
+                // item already visible - all good
+                return;
+            }
+
+            // normalize and set the desired viewport
+            float normalizedDesired = (desiredLowerBound + contentHeight) / (contentHeight - viewportHeight);
+            var normalizedPosition = new Vector2(0f, Mathf.Clamp01(normalizedDesired));
+            sr.normalizedPosition = Vector2.Lerp(sr.normalizedPosition, normalizedPosition, 10 * Time.fixedDeltaTime);
+        }
+
+    }
+}