After adding cocoapods successfully, the header file cannot be imported or an error is reported in not found file

cocoapods Add third party Library , also cocoapods Add success , But you can't import the header file on any file , And there's no hint at all , Even by hand #import "xxxx.h" Also reported wrong xxxx.h not found file , that We are in TARGETS --> Build Settings —> User Header Search Paths in add to ${SRCROOT}  That's all right. , If there is any mistake Try the previous step ${SRCROOT} Middle attribute   no-recursive Change it to recursive.