How do I bind the enabled binding of a button to whether or not an NSArrayController has a selection?

Question

I want to bind the enabled state of an NSButton to whether or not an NSArrayController has any selected items.

How do I do this?

Answer 1

Generally speaking, binding the enabled binding to the canRemove property of the array controller should give you what you want. After all, you can only remove an object if there's one selected.

Answer 2

Another option is to bind to selectedObjects.@count

Answer 3

This is the answer for IB:

If you need to setup the OR relationship with other NSArrayController (or other value), there is the section Enabled 2 , and so on. So, in my case, i have: