Looking at my project in the symbol navigator view, I noticed each class listed twice. They are identical, but the code runs fine, what is going on?
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XCode (with Swift) still has a lot of hick-ups. Restarting helps in most cases. Eventually try `rm -rf "$(getconf DARWIN_USER_CACHE_DIR)/org.llvm.clang/ModuleCache"` in between. – qwerty_so Feb 16 '15 at 21:04
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Thanks thomas, will do. – user160632 Feb 17 '15 at 17:39
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Even if Xcode 6 isn't in Beta anymore, there are still a lot of issues(Editor stops working etc.). In most cases these errors can be resolved by simply restarting Xcode.
If that doesn't help you, try to Clean your project: Product->Clean
. Also you could clean Xcode manually by deleting all files inside ~/Library/Developer/Xcode/DerivedData

Christian
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