setPersistentStoreCoordinator Core Data BAD ACCESS - ios

Question

I had code that worked before IOS 9. After I compiled with some other changes the to code now the line in the code below dies with a BAD ACCESS message. I cant for the life of me understand why this used to work and now it doesnt.
[_managedObjectContext setPersistentStoreCoordinator:coordinator];<<< THIS LINE CRASHES - BAD ACCESS
#pragma mark - Core Data stack
- (void)setmanagedObjectContext
{
if (_managedObjectContext != nil) {
return ;
}
NSPersistentStoreCoordinator *coordinator = [self persistentStoreCoordinator];
if (coordinator != nil)
{
_managedObjectContext = [NSManagedObjectContext alloc];
**[_managedObjectContext setPersistentStoreCoordinator:coordinator];<<< THIS LINE CRASHES - BAD ACCESS**
}
}
// Returns the managed object model for the application.
// If the model doesn't already exist, it is created from the application's model.
- (NSManagedObjectModel *)managedObjectModel
{
if (_managedObjectModel != nil) {
return _managedObjectModel;
}
NSURL *modelURL = [[NSBundle mainBundle] URLForResource:#"wrh" withExtension:#"momd"];
_managedObjectModel = [[NSManagedObjectModel alloc] initWithContentsOfURL:modelURL];
return _managedObjectModel;
}
// Returns the persistent store coordinator for the application.
// If the coordinator doesn't already exist, it is created and the application's store added to it.
- (NSPersistentStoreCoordinator *)persistentStoreCoordinator
{
if (_persistentStoreCoordinator != nil) {
return _persistentStoreCoordinator;
}
NSURL *storeURL = [[self applicationDocumentsDirectory] URLByAppendingPathComponent:#"wrh.sqlite"];
NSError *error = nil;
_persistentStoreCoordinator = [[NSPersistentStoreCoordinator alloc] initWithManagedObjectModel:[self managedObjectModel]];
if (![_persistentStoreCoordinator addPersistentStoreWithType:NSSQLiteStoreType configuration:nil URL:storeURL options:nil error:&error]) {
NSLog(#"Unresolved error %#, %#", error, [error userInfo]);
abort();
}
return _persistentStoreCoordinator;
}

Answer 1

I rewrote the above with a hint from Willeke. I looked up his hint and figured a better way to do this. Here is the code now that works!
- (void)setmanagedObjectContext
{
if (_managedObjectContext != nil) {
return ;
}
NSURL *storeURL = [[self applicationDocumentsDirectory] URLByAppendingPathComponent:#"wrl.sqlite"];
_managedObjectContext =
[[NSManagedObjectContext alloc] initWithConcurrencyType:NSMainQueueConcurrencyType];
self.managedObjectContext.persistentStoreCoordinator =
[[NSPersistentStoreCoordinator alloc] initWithManagedObjectModel:self.managedObjectModel];
NSError* error;
[self.managedObjectContext.persistentStoreCoordinator
addPersistentStoreWithType:NSSQLiteStoreType
configuration:nil
URL:storeURL
options:nil
error:&error];
if (error) {
NSLog(#"error: %#", error);
}
self.managedObjectContext.undoManager = [[NSUndoManager alloc] init];
}
// Returns the managed object model for the application.
// If the model doesn't already exist, it is created from the application's model.
- (NSManagedObjectModel *)managedObjectModel
{
if (_managedObjectModel != nil) {
return _managedObjectModel;
}
NSURL *modelURL = [[NSBundle mainBundle] URLForResource:#"wrh" withExtension:#"momd"];
_managedObjectModel = [[NSManagedObjectModel alloc] initWithContentsOfURL:modelURL];
return _managedObjectModel;
}