Instantiate a class that derives from MonoBehaviour [duplicate]

问题

Is there a way to instantiate a class that derives from MonoBehaviour such as the example bellow without getting the warning: "You are trying to create a MonoBehaviour using the 'new' keyword. This is not allowed. MonoBehaviours can only be added using AddComponent(). Alternatively, your script can inherit from ScriptableObject or no base class at all"

Example:

public class e1506131012test2 : MonoBehaviour 
{
    Move move = new Move();
    //Move move = gameObject.GetComponent<Move>();

    void Update()
    {
        move.Printing();
    }

}

public class Move : MonoBehaviour 
{
    public int number = 5;

    public void Printing()
    {
        print(number);
    }
}

回答1:

There are a few ways you can do this, the easiest is probably to use AddComponent as the error message suggests:

Move move;
void Start()
{
    move = gameObject.Addcomponent<Move>();
}

The reason you can't just new up an object that derives from MonoBehaviour is that such objects must be a component of a GameObject. As such, whenever you create one you have to ensure that it is added in a valid way.

回答2:

Just don't derive it from MonoBehaviour.

public class Move 
{
    public int number = 5;

    public void Printing()
    {
        print(number);
    }
}

And if it really must be a MonoBehaviour, that means you probably have it on a prefab, in which case you use Instantiate().

来源：https://stackoverflow.com/questions/30849855/instantiate-a-class-that-derives-from-monobehaviour

标签

inheritance

unity3d