在Xcode中，在左侧文件树的顶部选择您的项目.

In Xcode, select your project at the top of the file tree on the left hand side.

从此处选择目标，然后单击构建阶段"选项卡.确保要重命名的类的.m文件在编译源"下列出

From there, select your target, and click the "Build Phases" tab. Make sure the .m file of the class you're wanting to rename is listed under "Compile Sources"