无JIRA任务 修改组件destory生命周期,确保所有组件的ref都会被调用

src/core/3.ob.js

@@ -90,11 +90,11 @@
         //释放当前对象
         _purgeRef: function () {
             if (this.options.__ref) {
-                this.options.__ref.call(null);
+                this.options.__ref.call(null, null);
                 this.options.__ref = null;
             }
             if (this.options.ref) {
-                this.options.ref.call(null);
+                this.options.ref.call(null, null);
                 this.options.ref = null;
             }
         },

src/core/4.widget.js

@@ -738,12 +738,13 @@
             callLifeHook(this, "destroyed");
             this.destroyed = null;
             this._isDestroyed = true;
+            this._purgeRef();
+            this.purgeListeners();
         },
 
         _unMount: function () {
             this.__destroy();
             this.fireEvent(BI.Events.UNMOUNT);
-            this.purgeListeners();
         },
 
         _empty: function () {