出现的UIDevice找不到 我加上#import <UIKit/UIKit.h>以后, 又显示
Undefined symbols for architecture x86_64:
"_OBJCCLASS$_DOUMPMediaLibraryAssetLoader", referenced from:
objc-class-ref in DOUAudioFileProvider.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
出现的UIDevice找不到 我加上#import <UIKit/UIKit.h>以后, 又显示 Undefined symbols for architecture x86_64: "_OBJCCLASS$_DOUMPMediaLibraryAssetLoader", referenced from: objc-class-ref in DOUAudioFileProvider.o ld: symbol(s) not found for architecture x86_64 clang: error: linker command failed with exit code 1 (use -v to see invocation)
这个是怎么回事