You can get the current store from the Persistent Store Coordinator with:
NSURL *url = @"aaa\bbbb\ccc\xyz.sqlite"
NSPersistentStoreCoordinator *yourPSC = self.psc // Create or obtain reference to your psc
NSPersistentStore *ps = [yourPSC persistentStoreForURL:url];
[self DoSomethingWith: ps];
If you do not know which of your psc contain the store at url, check yourPSC.persistentStores
for contains a store with same url.
Like so:
for (NSPersistentStore *store in yourPSC.persistentStores) {
if ([store.URL isEqual:url]) {
[yourPSC removePersistentStore:store error:nil];
}
}