Hello,
I have started playing with core data and I am having trouble to get the
attributed string from an NSTextView into my program.
In the project, the .xcdatamodel contains an Entity called 'signatures' which
has a property named 'sigText'. I have set the type of sigText to Binary Data.
In my .xib file, I have a NSScrollview containing an NSTextView. I have binded
the NSTextView data to an object controller. The controller key is: selection;
the model key path is 'sigText' and the value transformer is
NSUnarchiveFromData.
The application correctly saves and displays my data when I save/open documents.
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
Any help with this would be very welcome!
Regards,
Bernard._______________________________________________
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