In Podfile I
    pod 'AFNetworking', '~> 2.6.0'
pod update and I open project using xcworkspace.
And everything gone my way,but:
when i import AFNetworking ,Xcode prompt 'No such module AFNetworking'
I searched the solution for this question, and did like this:    in  'Built setting ->User Header Search Paths ' add ${SRCROOT} and choose recursive. 
But it didn't  work . Xcode throw the same mesage :'No such module AFNetworking'
 
     
    