[ios开发]程序中bug处理Unable to load module

在开发中遇到了这样的bug：

fatal error: malformed or corrupted AST file: 'Unable to load module "/Users/mac/Library/Developer/Xcode/DerivedData/ModuleCache/343TSDGJVVCHH/Darwin.pcm": module file not found'
note: after modifying system headers, please delete the module cache at '/Users/mac/Library/Developer/Xcode/DerivedData/ModuleCache/343TSDGJVVCHH'
1 error generated.

【XCode】不一样版本xcode打开项目报错

解决方法：
点击XCode -> window ->Organizer 选取出问题的project，点击右边delete按钮，从新运行便可。