我也遇到了问题，加了-ObjC -all_load编译报错   "std::basic_string<char, std::char_traits<char>, std::allocator<char> >::basic_string(char const*, unsigned long, std::allocator<char> const&)", referenced from:       zxing::pdf417::DecodedBitStreamParser::byteCompaction(int, zxing::ArrayRef<int>, int, zxing::Ref<zxing::String>) in libZXingWidget.a(DecodedBitStreamParser-8195A93E6656064C.o)   "std::allocator<char>::~allocator()", referenced from:       std::_Vector_base<char, std::allocator<char> >::_Vector_impl::~_Vector_impl() in libZXingWidget.a(Decoder-3DF771F40A970F8E.o)   "std::basic_string<char, std::char_traits<char>, std::allocator<char> >::basic_string(char const*, std::allocator<char> const&)", referenced from:       +[ProductResultParser parsedResultForString:format:] in libZXingWidget.a(ProductResultParser.o)       ___cxx_global_var_init.1 in libZXingWidget.a(Code39Reader.o)       ___cxx_global_var_init.1 in libZXingWidget.a(Code93Reader.o)       zxing::oned::Code128Reader::decodeRow(int, zxing::Ref<zxing::BitArray>) in libZXingWidget.a(Code128Reader.o)       zxing::aztec::Decoder::getEncodedData(zxing::Ref<zxing::BitArray>) in libZXingWidget.a(Decoder-387E8B3BE4AFD07D.o)       zxing::common::StringUtils::guessEncoding(char*, int, std::map<unsigned int, std::string, std::less<unsigned int>, std::allocator<std::pair<unsigned int const, std::string> > > const&) in libZXingWidget.a(StringUtils.o)       zxing::common::CharacterSetECI::CharacterSetECI(int const*, char const* const*) in libZXingWidget.a(CharacterSetECI.o)       ... ld: symbol(s) not found for architecture arm64 clang: error: linker command failed with exit code 1 (use -v to see invocation) Showing first 200 notices only