xcode - Xcode Renaming Class's and XIB ERRORS?

Question

Ive been cleaning up my code abit and started renaming some .h and .m files which link to xib files. I did this to my main view controller and have no got about 20 Semantic Issues all linking to the xib i assume i have no clue what the correct procedure is to fix this issue. Thanks in advance for your help!!

Here is the screen shot :

Answer 1

编辑：

通过在屏幕截图中看到错误，执行这个漫长而艰巨的任务，在您当前的课程中添加以下内容。

#import "BTViewController.h"

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而不是手动进行，您应该重构为：

选择班级名称。

从菜单中选择重构，然后按照步骤操作。