AFNetworking error & quot; _ UTTypeCopyPreferredTagWithClass & quot;, referenced from: _ AFContentTypeForPathExtens, chromeextens

AFNetworking error "_ UTTypeCopyPreferredTagWithClass", referenced from: _ AFContentTypeForPathExtens, chromeextens

Problem: During interaction with Unity, the following error occurs when a project file packaged from the Unity development tool is added to the AFNetworking library:

Undefined symbols for architecture armv7:

"_ KUTTagClassMIMEType", referenced from:

-[AFStreamingMultipartFormData appendPartWithFileURL: name: error:] in AFURLRequestSerialization. o

"_ KUTTagClassFilenameExtension", referenced from:

-[AFStreamingMultipartFormData appendPartWithFileURL: name: error:] in AFURLRequestSerialization. o

"_ UTTypeCreatePreferredIdentifierForTag", referenced from:

-[AFStreamingMultipartFormData appendPartWithFileURL: name: error:] in AFURLRequestSerialization. o

"_ UTTypeCopyPreferredTagWithClass", referenced from:

-[AFStreamingMultipartFormData appendPartWithFileURL: name: error:] in AFURLRequestSerialization. o

Ld: symbol (s) not found for architecture armv7

Clang: error: linker command failed with exit code 1 (use-v to see invocation)

 

 

The reason is that MobileCoreServices. framework is not added (this framework defines the underlying type used by the unified type identifier (UTIs)

Solution: Add MobileCoreServices. framework under Build Phase-> Link Binary With Libraries. The program is successfully added.