To summarize what you've done:
1. You set up a Pages NSArrayController.
2. You set up a Masters NSArrayController.
3. You bind the pop-up's Content Values to the Masters controller's
"arrangedObjects.name".
4. You bind the pop-up's Selected Value to the Pages controller's
"selection.master" property.
I think the issue is that Step #4 is incorrect, and you're missing
Step #5. There's also one other caveat.
Step 4 should be:
4. You bind the pop-up's Selected Object to the Pages controller's
"selection.master" property.
The Selected Value binding is for the title of the selected item; the
Selected Object binding is used to actually choose the selected item.
The missing Step 5 is:
5. Bind the pop-up's Content to the Masters controller's
"arrangedObjects".
This will ensure that each item in the pop-up represents an item
available via the Masters controller. Think of it this way: "Content
Values" and "Selected Value" are about what the pop-up shows to the
user, while "Content" and "Selected Object" are about the underlying
objects the pop-up represents.
One other thing to ensure is that you're *only* using the specific
Masters controller you set up in Step #2 for populating this pop-up.
One common issue is to try to "consolidate" controllers; since
bindings are generally two-way, this can cause unexpected behavior.
Use separate controllers for separate situations, even if they're
bound to the same thing.
-- Chris
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