Xcode 报错：Undefined symbols for architecture x86_64:
"_OBJC_CLASS_$_CTTelephonyNetworkInfo", referenced from:
objc-class-ref in libWeiboSDK.a(WBSDKPhoneCountryView.o)
objc-class-ref in libWeChatSDK.a(MTAHelper.o)
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
Showing Recent Messages
Undefined symbol: _OBJC_CLASS_$_CTTelephonyNetworkInfo
错误图示如下：
报错图示
这时候只需要选中工程项目，点击General，找到 Frameworks,Libraries,and Embeded Content ,点击下方加号，把CoreTelephony.framework添加进去就行了。运行发现报错消失了。
