结构大修改，改成朴实无华的结构，不过度架构。能跑就行

Assets/Plugins/FairyGUI/Scripts/UI/Gears/GearDisplay2.cs

@@ -0,0 +1,55 @@
+using System;
+using FairyGUI.Utils;
+
+namespace FairyGUI
+{
+    /// <summary>
+    /// Gear is a connection between object and controller.
+    /// </summary>
+    public class GearDisplay2 : GearBase
+    {
+        /// <summary>
+        /// Pages involed in this gear.
+        /// </summary>
+        public string[] pages { get; set; }
+        public int condition;
+
+        int _visible;
+
+        public GearDisplay2(GObject owner)
+            : base(owner)
+        {
+        }
+
+        override protected void AddStatus(string pageId, ByteBuffer buffer)
+        {
+        }
+
+        override protected void Init()
+        {
+            pages = null;
+        }
+
+        override public void Apply()
+        {
+            if (pages == null || pages.Length == 0
+                || Array.IndexOf(pages, _controller.selectedPageId) != -1)
+                _visible = 1;
+            else
+                _visible = 0;
+        }
+
+        override public void UpdateState()
+        {
+        }
+        public bool Evaluate(bool connected)
+        {
+            bool v = _controller == null || _visible > 0;
+            if (this.condition == 0)
+                v = v && connected;
+            else
+                v = v || connected;
+            return v;
+        }
+    }
+}