我正在尝试使用兄弟打印机mobile sdk for ios(BRPtouchPrinterKit.framework(创建一个xamarin.ios绑定库。
当您在mac中使用"/Users/[username]/Desktop/BrowthPrinterSDK/bpsdkBinding/bpsdkBinding/BRPtouchPrinterKit.framework/Versions/A/"下的"BRPtouchPrinterKit"时，Xamarin.iOS绑定项目编译和构建不会出错。
当我尝试在示例中使用dll时，以及当我尝试运行相同的dll时，我在运行时会遇到以下错误。
clang : error : linker command failed with exit code 1 (use -v to see invocation)
MTOUCH : error MT5210: Native linking failed, undefined symbol: std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >::find(char, unsigned long) const. Please verify that all the necessary frameworks have been referenced and native libraries are properly linked in.
MTOUCH : error MT5210: Native linking failed, undefined symbol: std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >::compare(unsigned long, unsigned long, char const*, unsigned long) const. Please verify that all the necessary frameworks have been referenced and native libraries are properly linked in.
MTOUCH : error MT5210: Native linking failed, undefined symbol: std::__1::__shared_weak_count::__get_deleter(std::type_info const&) const. Please verify that all the necessary frameworks have been referenced and native libraries are properly linked in.
MTOUCH : error MT5210: Native linking failed, undefined symbol: std::__1::__vector_base_common<true>::__throw_length_error() const. Please verify that all the necessary frameworks have been referenced and native libraries are properly linked in.
MTOUCH : error MT5210: Native linking failed, undefined symbol: std::__1::__basic_string_common<true>::__throw_length_error() const. Please verify that all the necessary frameworks have been referenced and native libraries are properly linked in.
我相信您的问题与SO上的问题相同：MonoTouch本机库绑定链接失败
在这种情况下，您需要添加对libc++(-lc++(的引用，并确保将IsCxx标志设置为true。这可以在你的绑定项目中的linkwith.cs文件中完成，如上面的帖子所示，例如：
[assembly: LinkWith (... LinkerFlags = "-lc++ [and you may have some other -l* libs listed here here already]", IsCxx = true)]
如果您没有linkwith.cs文件，那么您应该能够添加上面对-lc++的引用，并在框架的属性中将IsCxx标志设置为true。(右键单击框架并选择"属性"(
感谢@jgoldberger
对于任何可能遇到相同问题的人，请浏览链接https://forums.xamarin.com/discussion/comment/340581