Xcode 6.3 Swift自动补全

Question

I just upgraded to the final release of Xcode 6.3, and found that the autocompletion for Swift code is totally nonfunctional. Sometimes, I cannot get the autocompletion popup to appear at all (even when I mash Esc or Ctrl+Space ). Other times, the autocompletion popup appears, but it does not provide context-sensitive completion suggestions, only “every word that appears in this file” completion (which, by the way, drives me stir-crazy). Autocompletion in Objective-C files works just fine.

I have tried removing my DerivedData folder, deleting the xcuserdata folders from inside the project package, removing the ~/Library/Caches/com.apple.dt.Xcode directory, and rebooting; none of these procedures has produced a change in Xcode's behavior.

Answer 1

The first thing I did was to delete the derived data directories in ~/Library/Developer/Xcode/DerivedData. That didn't fix it.

So, how to open Xcode and have it not reopen any projects that it had open? It seems there are a few ways.

If Xcode is in your dock, you can option-shift click on it and it won't open any projects.

Or, you can get rid of all your autosave info like this.

yes | rm -r ~/Library/Autosave\\ Information/

yes | rm -r ~/Library/Saved\\ Application\\State/com.apple.dt.Xcode.savedState

Finally, you can open Xcode from the command line with this incantation.

open -a /Applications/Xcode.app --args -ApplePersistenceIgnoreState YES