clang: error: linker command failed with exit code 1 (use -v to see invocation)
libidn.a
框架问题，去 https://github.com/robbiehanson/XMPPFramework 下载 然后重新删除Vendor重新导入新的Vendor库
xmpp ios 问题篇
1、 libidn.a(stringprep.o), in section __TEXT,__text reloc 8: indirect symbol index out of range for architecture i386