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Programming in Objective-C Programming in Objective-C
Programming in Objective-C is a concise, carefully written tutorial on the basics of Objective-C and object-oriented programming. The book makes no assumption about prior experience with object-oriented programming languages or with the C language (upon which Objective-C is based). And because of this, both novice and experienced programmers alike can use this book to quickly and effectively learn the fundamentals of Objective-C.

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buscarini on 12/31/69


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Published in: Objective C 

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  1. NSManagedObjectContext *moc = [self managedObjectContext];
  2. NSEntityDescription *entityDescription = [NSEntityDescription
  3.     entityForName:@\"GraphicalEntity\" inManagedObjectContext:moc];
  4. NSFetchRequest *request = [[[NSFetchRequest alloc] init] autorelease];
  5. [request setEntity:entityDescription];
  6.  
  7. NSError *error = nil;
  8. NSArray *array = [moc executeFetchRequest:request error:&error];
  9. if (array == nil)
  10. {
  11.     // TODO: Deal with error...
  12. 	return nil;
  13. }
  14. else return array;
  15.  
  16. }

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