Unable to use XCode 4 for launching .xcodeproj

Despite setting XCode开发者_如何学Python (4.0.1) as the default launcher on the info panel of a xcodeproj file and clicking the "Change All" button, xcode projects still seem to launch XCode 3.

My XCode 3.2.5 is installed in /Developer and XCode 4.0.1 in /XCode4

Should this be a problem?

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Answering my own question., Apparently, renaming /Developer to /XCode3 and /XCode4 to /Developer fixed this.

Not sure if anyone else have this issue.

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Have you try to Open XCode4 and load the xcodeproj? If it works, then there's no problem with XCode4 itself. Otherwise, try to use Open With in the context menu.