I have a couple of projects that I had started under Xcode 3.2.x some time ago. I switched to Xcode 4 a few days ago and want to make use of the Workspace feature as both projects. Basically, my plan is to extract some common features out of the two projects and make them a common library that both projects depend on. However, before I even get to the tricky bit of dependencies I get stuck just adding my two projects to the workspace.
I tried creating a new workspace and selecting "Adding files to " from the context menu; I then select the .xcodeproj file from my first project and it appears in the left-hand side tree browser in my workspace. However, it's just the file, not the project that I get. That is, rather than getting a two-line entry in the tree browser where the first line states the project name and the second line says something like "1 target, iOS SDK 4.3" like in the Apple documentation, I get a single line simply stating the name of the .xcodeproj file including the extension. There is also no triangle on the left to expand the node. It's like I just dragged some file in the workspace, not a project. The same goes for the second project.
I have also created a new Project "Foo" from scratch in Xcode 4 and added it to my workspace, with the same result. I looked at Apple documentation and watched the 16 second video about a dozen times now, but cannot work out what I am doing wrong (if the problem is indeed in the chair and not in the computer).
I had this exact same problem. I think it stems from having another workspace already open referencing the project you want to add. I got it working by:
Worked fine. I have many workspaces all referencing an openssl project, and it seems to work OK when you only have one workspace open at a time in Xcode.