如题！
Ext Designer是ExtJS3.0的官方的可视化IDE，可视化拖拽控件，
官方说明：
Designer Preview
Constructing your interfaces in code will be a thing of the past. We are releasing a Designer Preview that will allow you to experiment with the designer interface and to explore how configs affect your layout. Soon, you will be able to build your application components using base Ext components and Certified User Extensions.
Code generation is currently not available. Our intentions are to charge a fee for this service and to enable our community to create and sell their creations on our marketplace. Our goals are lofty. We want to be the iTunes of Web App Development.
附件中有下载哦！
解压密码：本人的博客地址。
