将视口的中心区域设为容器,然后将网格添加到该容器。
this.viewport = Ext.ComponentQuery.query('viewport')[0];
this.centerRegion = this.viewport.down('[region=center]');
this.centerRegion.add(new Ext.grid.Panel({title:'Grid', columns:[{text:'col1'}]}));
例子:
http://jsfiddle.net/Ym5T4/1/