Cocoa interface element to add/remove fields like rules editor in Mail.app
What is the name of the Cocoa interface with buttons to add/remove rows?
Here is a picture of it in the mail app
Is this a standard interface or is it a custom feature?
Solution
The class you're looking for is NSRuleEditor. If you want something specialized for editing NSPredicate objects, take a look at the NSPredicateEditor subclass.
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