title: Xcode 5 - clang: error: linker command failed with exit code 1 (use -v to see invocation)
body: <p>I am facing a linker error when running my source code,  I have attached a screenshot also.
  I am new in iOS development and so I am not able to get the error. Any help would be much appreciated.<img src="https://i.stack.imgur.com/ITlFf.png" alt="enter image description here"> </p>