On Jun 20, 2010, at 8:11 AM, Bernard Knaepen wrote: > The trouble I have is to access the attributed string within my code to later > draw in a custom view. I am trying something like this: > > NSManagedObjectContext *context = [self managedObjectContext]; > NSManagedObjectModel *model = [self managedObjectModel]; > NSDictionary *entities = [model entitiesByName]; > NSEntityDescription *entity = [entities valueForKey:@"signatures"]; > > NSFetchRequest * fetch = [[NSFetchRequest alloc] init]; > [fetch setEntity: entity]; > > NSArray *results = [context executeFetchRequest:fetch error:nil]; > > myData = [[results objectAtIndex:0] valueForKey:@"sigText"]; > > NSAttributedString *signatureView = (NSAttributedString *)[NSUnarchiver > unarchiveObjectWithData:myData]; > > [mypreview lockFocus]; > [signatureView drawAtPoint:myPoint]; > [mypreview unlockFocus]; > > > Obviously something is wrong since the text is not drawn and the console > outputs: > > -[NSConcreteMutableData drawAtPoint:]: unrecognized selector sent to instance > 0x114a3afb0
From the error message, it would appear signatureView is not an NSAttributedString (NSMutableData, instead). So work backwards. You're making assumptions in your code: valueForKey:@"sigText" returns an NSData object, using NSUnarchiver on it yields an NSAttributedString. Test them (step through in debugger, NSLog(), etc) and see if your assumptions are valid. If they aren't valid, then move back up the chain to where the value is stored and see if you're storing the correct data. If your assumptions are valid, then I would suspect there might be some intervening code and you may be running into object ownership issues (retain/release, zombies). _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
