Soon after the main nib has been loaded, I need to execute a fetch
request. Now as the title says, the crash is "random": sometimes the
app executes just fine, sometimes it crashes.
When it does crash, here is where it happens:
[NSEntityDescription entityForName:anEntityName
inManagedObjectContext:managedObjectContext]
The error I'm getting is random as well, but always takes the form
"*** -[NSCFString _entityForName]: unrecognized selector sent to
instance xxx".
What changes launch after launch is the name of the class I'm
supposedly sending the message to. I've seen NSCFString, NSCFArray,
_NSPlaceholderTextFieldPlugin and other exotic class names...
I've also tried getting the entity description with the equivalent
code below...
NSManagedObjectModel *managedObjectModel = [[managedObjectContext
persistentStoreCoordinator] managedObjectModel];
NSEntityDescription *entity = [[managedObjectModel entitiesByName]
objectForKey:anEntityName];
... but the equivalent problem occurs ("*** -[NSCFString
entitiesByName]: unrecognized selector sent to instance xxx").
The code above is executed in a method called from -awakeFromNib. As
the nib file contains tree / array controllers that query the same
managedObjectContext, I've tried delaying the execution of my method
using performSelector:withObject:afterDelay: but it didn't seem to help.
Is NSEntityDescription acting crazy or am I?
Nick
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