koobas.hobune.stream
How do i remove a list item from the scene while adding the next?
I'm making a flashcard game and want to add a flashcard from a list to the scene with a button press. I can add the cards to the scene but sometimes they end up on the same layer as the previous flashcard and i can't see it. I would like it if each time i add a new flashcard from the list it ends up on the next layer (infront of the previous card) so i can see it, but i think it would be better to completely remove the previous flashcard when i press the button to add the next. How do i do that?
Here is what i have so far.
public class ListManager : MonoBehaviour { public List characterPrefabs = new List();
// Start is called before the first frame update
void Start()
{
}
// Update is called once per frame
void Update()
{
if (Input.GetKeyDown(KeyCode.RightArrow))
{
if (characterPrefabs.Count > 0)
{
int characterIndex = Random.Range(0, characterPrefabs.Count);
Instantiate(characterPrefabs[characterIndex], new Vector3(0, 0, 0), characterPrefabs[characterIndex].transform.rotation);
characterPrefabs.RemoveAt(characterIndex);
}
if (characterPrefabs.Count == 0)
{
Debug.Log("Game Over");
}
}
}
}
Hiya! You can simply store the most recently shown object as a variable, then destroy it when a new object is shown. I wrote some changes to your script that might help with that.
List<GameObject> characterPrefabs = new List<GameObject>();
// Added a variable to store the value of our last
// shown object!
private GameObject lastShownObject;
void Start()
{
}
void Update()
{
if (Input.GetKeyDown(KeyCode.RightArrow))
{
if (characterPrefabs.Count > 0)
{
// If the last shown object exists, destroy it.
// Alternatively, if you just want to keep it around,
// but deactivate it, you could use lastShownObject.SetActive(false)
if (lastShownObject)
Destroy(lastShownObject);
int characterIndex = Random.Range(0, characterPrefabs.Count);
// Store this new object as the last shown object
lastShownObject = Instantiate(characterPrefabs[characterIndex], new Vector3(0, 0, 0), characterPrefabs[characterIndex].transform.rotation);
characterPrefabs.RemoveAt(characterIndex);
}
if (characterPrefabs.Count == 0)
{
Debug.Log("Game Over");
}
}
}
In short, Instantiating an object returns that newly-created object, so you can store it to a variable. Then, you can simply check if it exists and destroy it before instantiating a new one (which is then stored to the variable in its place).
