In Qt Creator, how to change h,cpp,ui files does not invalidate the UI

Using QT this week, I ran into a very painful problem: when I created the dialog, I accidentally lost the wrong name. And it was discovered very late. This time the dialog box has been laid out almost, in order to change the name, hit the problem of more egg, changed the name after you can not use the switch to the slot function. The specific errors are shown below:
This application failed to start because ...
After a war, finally know how to change the name, the following steps:
1: Change the name of the H,cpp,ui.
2: To the UI file, change the name of the object. It is best to change the property box in the lower right corner, and then press ENTER.
3: To the CPP file, # # # # # # # Ui_ ... The name changes.

That's it, OK,!!!!!!!!!.

In Qt Creator, how to change h,cpp,ui files does not invalidate the UI