问题
I just uploaded to Xcode 10 and the compilation of my app that is using the DJI Mobile SDK doesn't work anymore. The error message comes from the DJIWidget module. I remember seeing a message similar to this one on Xcode 9.3 but it was only a warning. The error message is this one:
Showing Recent Messages :-1: Multiple commands produce '/Users/nachocarnicero/Library/Developer/Xcode/DerivedData/perceptionios-cuskgbsvtllwjkeyqpqurbegowwa/Build/Products/Debug-iphonesimulator/DJIWidget.framework/Headers/DJICalibratePixelBufferProvider.h': 1) Target 'DJIWidget' (project 'DJIWidget') has copy command from '/Users/nachocarnicero/git/Sterblue/MobileNew/ios/DJIWidget/DJIWidget/VideoPreviewer/Helper/ImageCalibrate/DJICalibratePixelBufferProvider.h' to '/Users/nachocarnicero/Library/Developer/Xcode/DerivedData/perceptionios-cuskgbsvtllwjkeyqpqurbegowwa/Build/Products/Debug-iphonesimulator/DJIWidget.framework/Headers/DJICalibratePixelBufferProvider.h' 2) Target 'DJIWidget' (project 'DJIWidget') has copy command from '/Users/nachocarnicero/git/Sterblue/MobileNew/ios/DJIWidget/DJIWidget/VideoPreviewer/Helper/ImageCalibrate/PixelBufferProvider/DJICalibratePixelBufferProvider.h' to '/Users/nachocarnicero/Library/Developer/Xcode/DerivedData/perceptionios-cuskgbsvtllwjkeyqpqurbegowwa/Build/Products/Debug-iphonesimulator/DJIWidget.framework/Headers/DJICalibratePixelBufferProvider.h'
As you can see from the following screenshot this error is blocking the compilation:
Has anyone encountered this issue and has managed to fix it?
Cheers,
Nacho
EDIT
I have managed to successfully compile the project with the "Legacy Build System" (by activating it under File->Workspace Settings), so this confirms that this is a problem with the "New Build System" which is enabled by default in Xcode 10
来源：https://stackoverflow.com/questions/52534673/djiwidget-compilation-breaks-on-xcode-10