Failed to instantiate the default view controller for UIMainStoryboardFile 'Main'

 给UITableViewController 展示数据时候 删除系统自带viewController 然后拖过来一个UITableViewController 指定class后没有指定main入口 报错如下
2 2015-05-26 09:02:38.284 团购[678:15798] Failed to instantiate the default view controller for UIMainStoryboardFile 'Main' - perhaps the designated entry point is not set?
 解决办法 指定main入口