Undefined symbols for architecture while using dylib C++ - xcode

Question

This is the procedure I am following to create dylib and using it ,please help me I am new to dylib .
I am creating dylib for c++ in xcode I have given Installation Directory #rpath this is my C++ code
Add.hpp:
#define EXPORT __attribute__((visibility("default")))
class Add
{
public:
EXPORT void HelloWorld(const char *);
EXPORT int AddTwo(int a,int b);
};
Add.cpp:
void Add::HelloWorld(const char * s)
{
AddPriv *theObj = new AddPriv;
theObj->HelloWorldPriv(s);
delete theObj;
};
int Add::AddTwo(int a, int b)
{
return a+b;
}
After creating dylib in other project using Copy files in build phases, copying it to Frameworks, I am able to see it in Sample.App/Contents/Frameworks/Mylib.dylib. In Build Settings, Runpath Search Paths is set to #executable_path/../Frameworks. I added header in root folder given Header Search Paths $(SRCROOT).
The error I get is:
Undefined symbols for architecture x86_64:
"Add::AddTwo(int, int)", referenced from:
-[ViewController viewDidLoad] in ViewController.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
Edit:
$ nm -gU ****/AddTest.app/Contents/Frameworks/libAdd.dylib
0000000000001170 T __ZN3Add10HelloWorldEPKc
0000000000001220 T __ZN3Add6AddTwoEii
able to see symboles in lib and otool output is:
$ otool -L libAdd.dylib
#rpath/libAdd.dylib (compatibility version 1.0.0, current version 1.0.0)
/usr/lib/libc++.1.dylib (compatibility version 1.0.0, current version 120.1.0)
/usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 1226.10.1)

Answer 1

resolved by adding library to Link Binary with Libraries in build phases