Question

Sorry to impose, but I would really appreciate it if someone would take a look at this and show me how to get this done:

Core Data works as expected with data associations between the Source list entry(s) and the upper right textField.

So does textField2 (lower right) if you manually type in a string.

I want to append a string in the lower textField, in this case a generic “Hello!” (implemented in the setText method) and have it also maintain it’s association with the source list entry.

To summarize: textField2 – manually type in a string, it works as expected. Append the coded string, and it does not maintain it’s association with the source list entry.

Here’s the sample project.

Thanks again for the help.

Answer 1

Here’s how I updated setText: method in MyDocument class:

-(IBAction)setText:(id)sender
{       
    NSString *newValue = [[output stringValue] stringByAppendingString:@"Hello!"];
    [[setText selection] setValue:newValue forKey:@"textField2"];
}

I think your assumptions on value setting direction was wrong. Object does not take a value from the text field. It’s the text field that takes value from the object. Hence I create newValue by taking current value of output text field and appending something to it. Then I take [setText selection] object (the one currently selected) and set it’s textField2 property to new value. This setValue:forKey method automatically updates the output test field with new value of textField2 property.