diff --git a/source/src/fairygui/GComboBox.ts b/source/src/fairygui/GComboBox.ts
index fc32e87..699ab6a 100644
--- a/source/src/fairygui/GComboBox.ts
+++ b/source/src/fairygui/GComboBox.ts
@@ -114,7 +114,7 @@ namespace fgui {
                 if (this._selectedIndex >= this._items.length)
                     this._selectedIndex = this._items.length - 1;
                 else if (this._selectedIndex == -1)
-                    this._selectedIndex = 0;
+                    this.selectedIndex = 0;
 
                 this.text = this._items[this._selectedIndex];
                 if (this._icons && this._selectedIndex < this._icons.length)
@@ -354,10 +354,10 @@ namespace fgui {
             str = buffer.readS();
             if (str != null) {
                 this.text = str;
-                this._selectedIndex = this._items.indexOf(str);
+                this.selectedIndex = this._items.indexOf(str);
             }
             else if (this._items.length > 0) {
-                this._selectedIndex = 0;
+                this.selectedIndex = 0;
                 this.text = this._items[0];
             }
             else
@@ -393,7 +393,7 @@ namespace fgui {
                 }
                 this._list.resizeToFit(this._visibleItemCount);
             }
-            this._list.selectedIndex = -1;
+            this._list.selectedIndex = this.selectedIndex;
             this.dropdown.width = this.width;
             this._list.ensureBoundsCorrect();
 
diff --git a/source/src/fairygui/GLoader3D.ts b/source/src/fairygui/GLoader3D.ts
index a9b3585..5bd7306 100644
--- a/source/src/fairygui/GLoader3D.ts
+++ b/source/src/fairygui/GLoader3D.ts
@@ -16,6 +16,7 @@ namespace fgui {
         private _container: Laya.Sprite;
         private _content: Laya.Skeleton;
         private _updatingLayout: boolean;
+        private _aniLoaded:Laya.Handler;
 
         public constructor() {
             super();
@@ -188,10 +189,14 @@ namespace fgui {
             }
         }
 
-        public get content(): Laya.Sprite {
+        public get content(): Laya.Skeleton {
             return this._content;
         }
 
+        public set onLoader(handler: Laya.Handler) {
+            this._aniLoaded = handler;
+        }
+
         protected loadContent(): void {
             this.clearContent();
 
@@ -238,6 +243,7 @@ namespace fgui {
 
             this._content = skeleton;
             this._container.addChild(this._content);
+            this._aniLoaded && this._aniLoaded.runWith(this._content);
             this._content.pos(anchor.x, anchor.y);
             ToolSet.setColorFilter(this._content, this._color);