修改了系统自带头文件后,Xcode会报错

1.Xcode自带头文件的路径

/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator7.1.sdk/System/Library/Frameworks/UIKit.framework/Headers

2.修改了系统自带头文件后,Xcode会报错

解决方案:删掉下面文件夹的缓存即可(aplle是电脑的用户名)

/Users/aplle/资源库/Developer/Xcode/DerivedData

或者

/Users/aplle/Library/Developer/Xcode/DerivedData