RequireComponent Manual     Reference     Scripting  
Scripting > Attributes > RequireComponent
RequireComponent Class, inherits from Attribute

The RequireComponent attribute lets automatically add required component as a dependency.

When you add a script which uses RequireComponent, the required component will automatically be added to the game object. This is useful to avoid setup errors. For example a script might require that a rigid body is always added to the same game object. Using RequireComponent this will be done automatically, thus you can never get the setup wrong.

// C# example:
// Mark the PlayerScript as requiring a rigidbody in the game object.
[RequireComponent (typeof (Rigidbody))]
class PlayerScript : MonoBehaviour
{
void FixedUpdate() {
rigidbody.AddForce(Vector3.up);
}
}

Constructors
RequireComponent

Require a single component