The custom accessory view for the current application.
- macOS 10.0+
You can customize the panel by adding a custom view. The custom object that is added appears just above the OK and Cancel buttons at the bottom of the panel. The
NSSave object automatically resizes itself to accommodate
accessory. You can use this property to change the accessory view as needed. If
nil, the Save panel removes the current accessory view.
The panel relinquishes ownership of the accessory view after the panel is closed. If you want to reuse the accessory view, you should not rely on the panel to hold onto the accessory view until the next time you use it; instead, you should maintain your own strong reference to the view.