title: What is the best way to remove old files and replacing with new in XCode?
body: <p>I have an Admob folder with old admob files i need to replace with newer version. What is the best way to replace the folder with files in it? "Remove reference only" or "Delete". I've tried both but when i copy the new files into the project i would get files with the same name already existed error. Even after the files are no longer in the project and i still get the same error. </p>
  
  <p>And sometimes after the files got deleted, the XCode project still link them in trash bin.</p>