diff --git a/Gruntfile.js b/Gruntfile.js
index 231de793c..d20b063de 100644
--- a/Gruntfile.js
+++ b/Gruntfile.js
@@ -61,7 +61,7 @@ module.exports = function (grunt) {
             },
 
             demoJs: {
-                src: ['demo/version.js', 'demo/**/*.js'],
+                src: ['demo/version.js', 'demo/app.js', 'demo/js/**/*.js'],
                 dest: 'demo/dist/demo.js'
             },
             demoCss: {
diff --git a/demo/js/center.js b/demo/js/center.js
index c3051dcf6..a17b0ed41 100644
--- a/demo/js/center.js
+++ b/demo/js/center.js
@@ -2,11 +2,54 @@ Demo.Center = BI.inherit(BI.Widget, {
     props: {
         baseCls: "demo-center"
     },
-    beforeCreate: function(){
+    beforeCreate: function () {
         console.log("beforeCreate");
     },
     render: function () {
-        console.log("render");
+        return {
+            type: "bi.vertical",
+            hgap: 50,
+            vgap: 20,
+            items: [{
+                type: "bi.label",
+                text: "栅格布局",
+                height: 50
+            }, {
+                type: "bi.lattice",
+                columnSize: [0.1, 0.1, 0.3, 0.4, 0.1],
+                items: [{
+                    type: "bi.label",
+                    height: 30,
+                    text: "Left-1",
+                    cls: "layout-bg1 lattice-item",
+                    hgap: 20
+                }, {
+                    type: "bi.label",
+                    height: 30,
+                    text: "Left-2",
+                    cls: "layout-bg2 lattice-item",
+                    hgap: 20
+                }, {
+                    type: "bi.label",
+                    height: 30,
+                    text: "Left-3",
+                    cls: "layout-bg3 lattice-item",
+                    hgap: 20
+                }, {
+                    type: "bi.label",
+                    height: 30,
+                    text: "Left-4",
+                    cls: "layout-bg4 lattice-item",
+                    hgap: 20
+                }, {
+                    type: "bi.label",
+                    height: 30,
+                    text: "Left-5",
+                    cls: "layout-bg5 lattice-item",
+                    hgap: 20
+                }]
+            }]
+        }
     },
     created: function () {
         console.log("created");
diff --git a/src/core/ob.js b/src/core/ob.js
index 700007636..8f1d4a885 100644
--- a/src/core/ob.js
+++ b/src/core/ob.js
@@ -6,6 +6,7 @@
 BI.OB = function (config) {
     this.options = $.extend(this._defaultConfig(config), config);
     this._init();
+    this._initRef();
 };
 $.extend(BI.OB.prototype, {
     props: {},
@@ -21,7 +22,6 @@ $.extend(BI.OB.prototype, {
 
     _init: function () {
         this._initListeners();
-        this._initRef();
         this.init();
     },