Adds a dynamic item to the dynamic item behavior’s item array.
- iOS 7.0+
- tvOS 9.0+
The dynamic item to add to the item array.
You can add a dynamic item to one or more dynamic item behaviors. For example, you could add a dynamic item to one dynamic item behavior to configure the item’s elasticity and to a second dynamic item behavior to configure its density. This is especially useful when you are defining custom, combined behaviors for your dynamic items.