Unreal Engine 4 Scripting with C++ Cookbook

Casting to a UInterface implemented in native code

One advantage that UInterfaces provides you with as a developer is the ability to treat a collection of heterogeneous objects that implement a common interface as a collection of the same object, using Cast< > to handle the conversion.

Note

Please note that this won't work if your class implements the interface through a Blueprint.

Getting ready

You should have a UInterface, and an Actor implementing the interface ready for this recipe.

Create a new game mode using the wizard within Unreal, or optionally, reuse a project and GameMode from a previous recipe.

How to do it...

1. Open your game mode's declaration, and add a new UPROPERTY() macro to it:

   UPROPERTY()
   TArray<IMyInterface*>MyInterfaceInstances;