Xcode -[XMPPSRVResolver processRecord:length:]

"_dns_free_resource_record", referenced from: -[XMPPSRVResolver processRecord:length:] in libEaseMobClientSDKLite.a(XMPPSRVResolver.o)

这样的错误，是由于缺少库：

添加libresolv.dylib库，就可以了