How to ignore missing components in list unity 2020?-CodePudding

How to ignore these missing elements?

How to remove my destroyed target from the list?

public class SkinMananger : MonoBehaviour {

public GameObject[] characters;
public int selectedCharacter = 0;
public GameObject carrot;

public void NextOption()
{
    characters[selectedCharacter].SetActive(false);
    selectedCharacter = (selectedCharacter   1) % characters.Length;
    characters[selectedCharacter].SetActive(true);

 
}

public void BackOption()
{
    characters[selectedCharacter].SetActive(false);
    selectedCharacter--;
    if(selectedCharacter < 0)
    {
        selectedCharacter  = characters.Length;
    }
    characters[selectedCharacter].SetActive(true);
  
}

public void PlayGame()
{

    PlayerPrefs.GetInt("selectedCharacter", selectedCharacter);
  
}

}

and I use Destroy(gameObject); for my characters when certain actions take effect. So I need a skin manager to work also when they are destroyed. As at this moment, it stuck.

CodePudding user response：

You can use Linq Where and the implicit bool operator like e.g.

using System.Linq;

...

public void RemoveInvalidEntries()
{
    characters = character.Where(c => c).ToArray();
}

This basically equals doing something like

var list = new List<GameObject>();
foreach(var c in characters)
{
    if(c) list.Add(c);
}
characters = list.ToArray();

Alternatively I usually prefer a dedicated class that keeps track of existing instances itself like e.g.

public class Character : MonoBehaviour
{
    private readonly static List<Character> instances = new List<Character>();

    public IReadOnlyList<Character> Instances => instances;

    private void Awake ()
    {
        instances.Add(this);
    }

    private void OnDestroy ()
    {
        instances.Remove(this);
    }
}

so later you can go through

Character.Instances

and be sure that in that list always only currently existing instances are registered.