objective c - CoreData: error: Failed to call designated initializer on NSManagedObject class

Question

I have a little damn problem with CoreData. I want to insert a new Object, so I first have to create one. This is done by that code:

Challenges *newChallenge = [[Challenges alloc] init];
[newChallenge setName:@"TestChallenge"];
[newChallenge setRounds:[[NSNumber alloc] initWithInt:12]];
[newChallenge setShots:[[NSNumber alloc] initWithInt:5]];
[newChallenge setDate:[NSDate date]];

But however after the alloc init I get this error:

CoreData: error: Failed to call designated initializer on NSManagedObject class 'Challenges'

What the hack is going wrong?

question from:https://stackoverflow.com/questions/14671478/coredata-error-failed-to-call-designated-initializer-on-nsmanagedobject-class

Answer 1

I think the problem is that Challenges is a NSManagedObject class and you need the designated initializer:

initWithEntity:insertIntoManagedObjectContext:

instead of

Challenges *newChallenge = [[Challenges alloc] init];

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