项目中引入阿里云.framwork出现的问题

首先，把官网提供的demo文件，转化.famework类型的。

# Clone the project
$ git clone git@github.com:aliyun/aliyun-oss-ios-sdk.git

# Enter the directory
$ cd aliyun-oss-ios-sdk

# Run the packaging script
$ sh ./buildFramework.sh

# Enter the generated packaging directory  where the AliyunOSSiOS.framework will be generated
$ cd Products && ls

加入框架后，有可能会出现以下的错误：

Undefined symbols for architecture arm64:
"_res_9_getservers", referenced from:
-[OSSIPv6Adapter getDNSServersIpStack] in AliyunOSSiOS(OSSIPv6Adapter.o)
"_res_9_ninit", referenced from:
-[OSSIPv6Adapter getDNSServersIpStack] in 
AliyunOSSiOS(OSSIPv6Adapter.o)
"_res_9_ninit", referenced from:
-[OSSIPv6Adapter getDNSServersIpStack] in AliyunOSSiOS(OSSIPv6Adapter.o)
"_res_9_ndestroy", referenced from:
-[OSSIPv6Adapter getDNSServersIpStack] in AliyunOSSiOS(OSSIPv6Adapter.o)
ld: symbol(s) not found for architecture arm64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

解决办法：

在 libraries 中添加libresolv.tbd

来自：https://github.com/aliyun/aliyun-oss-ios-sdk/issues/46