Xcode 4 code sens (code completion) disappeared

Question

Level 1

0 points

Xcode 4 code sens (code completion) disappeared

I want to share with you a problem I encountered using Xcode 4 GM seed build 4A278. It was shocking 😉 to get no convenient code sense (code completion) in one of my classes inherited from NSObject. My .h file had no problem whatsoever, but the .m file didn't react to any of my gestures including the control command key combination.

All other files in the project the code sensing feature worked fine. This was my first couple of hours with Xcode 4 and the project was converted from Xcode 3. In the end, the solution was to copy the code into memory, delete the .m file, add a new .m file and finally pasting the code in to the .m file. Voila, there was the code sensing. You never know, you may experience a similar problem in the future.

I think I really going to like the new Xcode 4, good job Xcode team!

MacBook Pro 17, Mac OS X (10.6.6)

Posted on Feb 7, 2011 4:39 AM

Reply

Answer 1

Feb 11, 2011 8:41 AM in response to AcidStuff

Actually I managed to solve this problem by deleting the xcode 4 code sense generated index files.
To do that, simply go to ~/Library/Developer/Xcode/DerivedData and delete all of its contents.
Re-open Xcode 4 and the index should be rebuilt.

Voilá, you have Code Sense again.

Reply

Answer 2

Feb 12, 2011 7:08 PM in response to Solivagant

Unfortunately that didn't work for me. I'm guessing it's some sort of cache issue, but I have no idea where it would be.

Reply

Answer 3

Feb 13, 2011 3:07 AM in response to Solivagant

Solivagant's solution worked for me. Thank you for taking the time to post.

Reply

Answer 4

Skybork

Level 1

0 points

Feb 14, 2011 5:37 AM in response to AcidStuff

I have the same problem, unfortunately deleting the derivedData Folder didn't work...

Reply

Answer 5

Maxim_A

Level 1

0 points

Feb 14, 2011 7:11 AM in response to AcidStuff

I had the same problem: project was converted from XCode 3. I tried to clean the project, tried to delete the folder - nothing worked. Created a new project and added my files. Probably something in the project left from old XCode3.

Reply

Answer 6

Feb 15, 2011 8:47 AM in response to AcidStuff

Removed the ~DerivedData did not work for me but AcidStuff's solution (copying the .m file, deleting the original, then creating a new .m file and pasting everything back in.....strangely enough works. Wonder what the problem is but....not worth the effort to chase it down. Just cut/paste .m files and code completion works wonderfully. THANKS ACIDSTUFF! 🙂

Reply

Answer 7

Lydster

Level 1

0 points

Feb 16, 2011 11:23 PM in response to AcidStuff

Unfortunately I have way too many files in my converted project (3->4) to recreate every file in this way, and unfortunately deleting the index does not work for me either.

Interestingly, when I have just rebuilt my project, Code Sense works, i.e. if I place the cursor in the middle of a function name and hit Esc I then see the completion list. But as soon as I start editing - it all disappears and I'm faced with "No Completions Found".

Aaaaaarghhhh!

Reply

Answer 8

Feb 18, 2011 7:45 AM in response to Lydster

I'm having this same problem as well:

Lydster wrote:
if I place the cursor in the middle of a function name and hit Esc I then see the completion list. But as soon as I start editing - it all disappears and I'm faced with "No Completions Found".

However, it only happens when my source code file is located above the project folder in the file system. When I move the files into the project folder or a sub folder of the project folder code completion works fine.

This appears to be a bug. Anyone else experiencing this?

Reply

Answer 9

cosmolux

Level 1

0 points

Feb 23, 2011 6:49 PM in response to AcidStuff

I am having this problem and unfortunately neither deleting the DerivedData dir nor pasting into a new file solved it. Also, I noticed that when code sense disappears, so does the subtle project-based syntax highlighting.

Reply

Answer 10

cosmolux

Level 1

0 points

Feb 23, 2011 7:27 PM in response to cosmolux

I submitted this as a bug to apple. Bug ID# 9046038

Reply

Answer 11

ahayman

Level 1

0 points

Feb 24, 2011 8:39 AM in response to AcidStuff

+1 on the issue. Deleting DerivedData worked for me.

Reply

Answer 12

ahayman

Level 1

0 points

Feb 24, 2011 9:02 AM in response to ahayman

Bah...forget it. Deleting the folder only worked until I started editing the file. Then is stopped working. Very annoying. It really makes code creation a much longer and more tedious processes. The problem is that I really like XCode 4 and don't want to switch back to 3.

Reply

Answer 13

uLikeIT

Level 1

0 points

Mar 10, 2011 9:31 AM in response to AcidStuff

I had the same problem and finally found a solution.

Check your XCode -> Preferences -> Documentation wether you have iOS library installed (seems it doesn't come with the installation).

Reply