[myko]

It wasn't until Swift came out that autocomplete for ObjC in Xcode finally started to function at a useful level.

Autocomplete in Swift is still broken but I don't think it's an issue with the language itself (autocomplete is probably easier to implement in Swift given the nature of the language).

[spideymans]

The autocomplete and syntax highlighting feature completely stops working sometimes. It’s beyond frustrating

[jondwillis]

Simply:

CMD+,

Locations

Derived Data

CMD+Q Xcode

Delete!!! Derived Data

Restart Xcode

Why not Clean Build Folder

  CMD+B

success!!

[ninkendo]

I have a shell alias for

  mv ~/Library/Developer/Xcode/DerivedData ~ && rm -rf ~/DerivedData &

And I use it constantly. This approach is fast because it does the actual rm in the background so I can relaunch Xcode right away.

[saagarjha]

I have a source editor extension that has no job but to clean this clean this ;)