2015-01-25 20:12:51.771 Todo[2377:200448] *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'unable to dequeue a cell with identifier Cell - must register a nib or a class for the identifier or connect a prototype cell in a storyboard'

7-15的时候添加searchbar后出现这样的错误，请问是因为什么产生的，如何解决？