Xcode4 Core Data Model Editor Display Problem

Question

I've had this problem ever since upgrading to xcode 4. In the core data model editor, I can't see my diagram view. Everything else seems to work, but mostly the graphic view is just blank. If I click around on entities in the list, I get a screen that looks like this: http://imgur.com/zE1Ci

Answer 1

I hit this problem, here is how I fixed it:

1. Quit Xcode
2. In a terminal or finder, remove the file myapp/myapp.xcdatamodeld/myapp.xcdatamodel/layout
3. Restart Xcode and open your project

Note: No guarantees you won't lose any work product. This solution allowed me to return to a working graphical state at the point just before the graphical problem began and I didn't lose any work.

Answer 2

I did something similar to Chris:

1. quit xcode
2. in finder, locate your datamodel file
3. copy the file to a safe place (I used my desktop)
4. delete the file from your project folder
5. open your project in xcode
6. right click in the navigator and "Add files"
7. select the datamodel in the safe place from step 3
8. tell it to copy the files if necessary
9. click "Add"