Could not insert new action connection could not find any information for the class named

When playing the code encountered a problem, with the storyboard when the page can not automatically get to the class, Automatic is empty, and then automatically selected under the class when the control seems to be dragged past, but when Cennect error: "Could not insert new Action connection could not find any information for the class named ". So guess, Target does not automatically import this class, but to look at this class of. m file does exist. What do we do? Exit Xcode, use command+shift+g on a blank page to go to the folder interface, and then enter ~/library/developer/xcode/deriveddata:

In the Deriveddata folder, find your error in this project name:

Delete it, finally open the project, compile again, you can automatically get the associated class file.

Reference Source: http://blog.csdn.net/keyboardota/article/details/9614383

Could not insert new action connection could not find any information for the class named