MonoBehaviour.OnBecameInvisible()

Description

OnBecameInvisible is called when the renderer is no longer visible by any camera.

This message is sent to all scripts attached to the renderer. OnBecameVisible and OnBecameInvisible is useful to avoid computations that are only necessary when the object is visible.

// Disables the behaviour when it is invisible

using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour
{
    void OnBecameInvisible()
    {
        enabled = false;
    }
}

OnBecameInvisible can be a co-routine, simply use the yield statement in the function. When running in the editor, Scene view cameras will also cause this function to be called.