Saving and Deleting NSManagedObject & NSManagedObjectContext
问题 Three Questions but they are all related. If you like I can divide them into three questions so that you can more credits. Let me know if you'd like for me to do that. I have the following code that allows me to access NSManagedObject self.managedObjectContext = [(STAppDelegate *)[[UIApplication sharedApplication] delegate] managedObjectContext]; NSError *error; NSFetchRequest *request = [[NSFetchRequest alloc] init]; [request setEntity:[NSEntityDescription entityForName:@"LetsMeet"