NSPredicate to return ANY on self - core-data

Question

Is there a method (NSPredicate or other function) that returns ANY single existing NSManagedObject. Could also be the count of an entity type. No further requirements other than mere existence on self.
NSPredicate *fetch = [NSPredicate predicateWithFormat: "#ANY"]
....
[fetch setEntity:entityDescription];
[fetch setPredicate: predicate];
[fetch setFetchLimit:1];
Note that this is the 'root' object, thus no instance at this boot stage.

Answer 1

I am not sure if I understand your question correctly, but to get a one (arbitrary) object
of your entity just don't add a predicate to the fetch request and set the fetch limit to
one:
NSFetchRequest *request = [NSFetchRequest fetchRequestWithEntityName:#"YourEntity"];
[request setFetchLimit:1];
NSError *error;
NSArray *result = [context executeFetchRequest:request error:&error];
if (result == nil) {
// Error executing fetch request
} else if ([result count] == 0) {
// Found none
} else {
// Found one
NSManagedObject *obj = result[0];
}

Answer 2

I'm coming across this a few years later & thought it might be helpful to see this in Swift. In my testing, this returns the first entry in the data store, not necessarily a random entry from the whole store or even a different one each time.
Assuming that by "ANY" you're OK simply returning the first entry, here's how to do it in Swift.
for Swift 4.2:
let fetchRequest : NSFetchRequest<yourEntityName> = yourEntityName.fetchRequest()
fetchRequest.fetchLimit = 1
do {
let fetchResults = try managedContext.fetch(fetchRequest)
if fetchResults.count == 0 {
// found none
} else {
// found one
var obj: NSManagedObject = fetchResults[0]
}
} catch let error as NSError {
print("Could not fetch \(error), \(error.userInfo)")
}