Class

GKEntity

An object relevant to gameplay, with functionality entirely provided by a collection of component objects.

Declaration

class GKEntity : NSObject

Overview

A GKEntity object represents an entity in games with Entity-Component architecture. In this design, an entity is a general type for objects relevant to the game. Entities typically define no functionality of their own—instead, you define an entity’s features through composition, by adding components that each handle specific aspects of an entity’s behavior in a general way. Because components (GKComponent subclasses) are general and reusable, you can add many kinds of entities to a game by combining components in different ways, without needing to design new entity classes.

For more information on Entity-Component architecture, read Entities and Components in GameplayKit Programming Guide.

Topics

Creating an Entity

init()

Initializes a new entity object.

Managing an Entity’s List of Components

var components: [GKComponent]

The entity’s list of components.

func addComponent(GKComponent)

Adds a component to the entity.

Performing Periodic Updates

func update(deltaTime: TimeInterval)

Performs periodic updates for each of the entity’s components.

Relationships

Inherits From

See Also

Entities and Components

class GKComponent

The abstract superclass for creating objects that add specific gameplay functionality to an entity.

class GKComponentSystem

Manages periodic update messages for all component objects of a specified class.