Crossing To-Many Relationships with Cocoa Bindings
Last Revision: | |
Build Requirements: | Xcode 4.6 or later, OS X 10.7 or later. |
Runtime Requirements: | OS X 10.7 or later. |
This sample shows how you can use array controllers (instances of NSArrayController) to create a user interface that traverses multiple (in this case two) to-many relationships. In particular, it illustrates the use of the @distinctUnionOfSets collection operator to display the aggregation of the objects in a to-many relationship derived from another to-many relationship; that is, given A ->> B ->> C, it shows all the Cs associated with a given A. The sample also demonstrates use of conditional bindings, and integration with Core Data. No custom code is required to support the application user interface.
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