public class CamChangerSpace : MonoBehaviour {
    public Camera Cam1White, Cam2Black;
    public KeyCode space;
    public bool camSwitch = false;

    void Update()
    {
         if (Input.GetKeyDown("space"))
         {
            MyButtonMethod();
         }
    }

    public void MyButtonMethod()
    {
        camSwitch = !camSwitch;
        Cam1White.gameObject.SetActive(camSwitch);
        Cam2Black.gameObject.SetActive(!camSwitch);
    }
 }