Xcode 6 isn’t autocompleting in Swift

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This fix from apple dev forums works for me. I have had performance/autocomplete issues since beta 5 i think and now xcode 6.1/Yosemite on my old 2010 MBP is working flawlessly.

  1. Quit Xcode.
  2. Restart the computer (this is to clear any in-memory caches).
     
  3. Delete the contents of the DerivedData folder
    (~/Library/Developer/Xcode/DerivedData)
  4. [This is the key move:] Delete ~/Library/Caches/com.apple.dt.Xcode.

Now launch Xcode once more…

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