Undefined symbols for architecture i386: Compilation error caused by adding a third-party class library

Refresh the class library from the drop-down menuEgorefreshtableheaderviewAdd the resource file to the project, but forget to assume that the quartzcore. Framework framework causes compilation errors:

Undefined symbols for architecture i386:

"_ Catransform3dmakerotation", referenced from:

-[Egorefreshtableheaderview setstate:] In EGORefreshTableHeaderView-6F75314CE1079327.o

"_ Objc_class _ $ _ calayer", referenced from:

Objc-class-ref in EGORefreshTableHeaderView-6F75314CE1079327.o

"_ Objc_class _ $ _ catransaction", referenced from:

Objc-class-ref in EGORefreshTableHeaderView-6F75314CE1079327.o

"_ Catransform3didentity", referenced from:

-[Egorefreshtableheaderview setstate:] In EGORefreshTableHeaderView-6F75314CE1079327.o

"_ Kcagravityresizeaspect", referenced from:

-[Egorefreshtableheaderview initwithframe: arrowimagename: textcolor:] In EGORefreshTableHeaderView-6F75314CE1079327.o

"_ Kcatransactiondisableactions", referenced from:

-[Egorefreshtableheaderview setstate:] In EGORefreshTableHeaderView-6F75314CE1079327.o

Ld: symbol (s) not found for architecture i386

Clang: Error: Linker command failed with exit code 1 (use-V to see Invocation)

Solution: targets --> build phases --> link binary with libraries --> quartzcore. Framework

When adding other class libraries, this error may also occur because no framework is added or the libraries on which they depend.