I just purchased your book last night from Barnes & Noble.
I’m so excited about learning.
Most importantly, I just wanted to say thank you so much as well for updating the information for Xcode 4. I’m on chapter 2. It’s going well.

Thanks again.

The only thing I’m doing differently to yours is setting the custom cell in awakeFromNib, because I’m using a non document based app, so can’t use windowControllerDidLoadNib…

- (void)awakeFromNib {
// Set next responder for this view so we can intercept delete key presses
[mainView setNextResponder:self];

// Set up custom cell for table view
EmployeeTableCell *statusCell = [[EmployeeTableCell alloc] init];
[statusTableColumn setDataCell:statusCell];
}

Thanks for the speedy reply. Appreciate your help. I had thought the same thing, why it is trying to use a placeholder when I haven’t set one up and I’m using a NSCell? However there’s definitely no place holder set.

To check I just added a brand new column to my table, set the binding to clientDictionary and all is ok. But then I change the NSTableColumn type to be my CustomCell class, and it crashes with the setPlaceHolderString error.

It’s just too weird!

Any other ideas?

Thanks again.

This is a great tutorial and the clearest I’ve found on this subject. So thank you for that. However! I am having a spot of difficulty despite believing I’ve followed the steps to the letter in my own project.

I get up to the part where you bind to the personDictionary in Interface Builder. I’ve defined personDictionary both in my model and also added the various required functions to the custom managedObject class code. When I run the project, I get the following error and crash:

[CustomCell setPlaceholderString:]: unrecognized selector sent to instance 0x100637f20

If I unbind the personDictionary from the table column or change it back to the NSString firstName, the error goes away.

Do you have any ideas what might be happening or pointers of where to look for problems. This has me stumped!

Appreciate your time.

Thanks,

Gareth.

I have your book Core Data for iOS. Excellent all around! I wrote a five-star review and updated after completing the book. I learned a lot. I have contacted the publisher though because I cannot find the source code even after creating an account on their website and logging in. The book gives a link which brings up a descriptive page about this book but unless I am near blind, I find no link to the source code. I advised the publisher that I would update my review and note that the source has been made available. Meantime if you can send it to me, that would be wonderful. Best Regards.

/**
Copies all of the attribute values from the specified object into the
current object. No class comparison is attempted here (to avoid having to
walk the inheritance tree), so care should be taken to copy values from an
object with matching keys.
*/

- (void) copyAttributesFromObject: (NSManagedObject *)managedObject {

// get the array of attribute keys and set the items accordingly
NSArray *attributeKeys = [[self entity] attributeKeys];
NSString *attributeName;

// loop through the keys
int i, count = [attributeKeys count];
for ( i=0; i<count; i++ ) {

// Get the attribute name, then copy the value
attributeName = [attributeKeys objectAtIndex: i];
[self setPrimitiveValue: [managedObject primitiveValueForKey: attributeName] forKey: attributeName];
}
}

This was with XCode 3.1.2 on 10.5.