Unity给物体添加多个Tag的实现

public class Tags : MonoBehaviour{
    public List<string> tags=new List<string>();
}

public class TagManager : MonoBehaviour {
   public static TagManager Instance { get; private set; }
   private void Awake() {
      if (Instance == null) {
         Instance = (TagManager) this;
         DontDestroyOnLoad(gameObject);
      }
      else {
         Destroy(gameObject);
      }
   }
}

public List<string> tagsList = new List<string>();
[ShowInInspector]
public Dictionary<string, List<GameObject>> tagsDictionary = new Dictionary<string, List<GameObject>>();

private void InitTags() {
   int length = tagsList.Count;
   tagsDictionary = new Dictionary<string, List<GameObject>>(length);
   for (int i = 0; i < length; i++) {
      tagsDictionary.Add(tagsList[i], new List<GameObject>());
   }
}

public static class Extensions {
   //包含所有的 tag 返回true
   public static bool HasTag(this GameObject gameObject, params string[] tag) {
      if (gameObject.TryGetComponent<Tags>(out Tags t)) {
         for (int i = 0; i < tag.Length; i++) {
            if (!t.tags.Contains(tag[i])) {
               Debug.Log(gameObject.name+"不存在"+tag+"标签");
               return false;
            }
         }
      }
      return true;
   }
   //给物体增加 tag
   public static void AddTag(this GameObject gameObject, params string[] tags) {
      if (gameObject.TryGetComponent<Tags>(out Tags t)) {
         foreach (var tag in tags) {
            if (!TagManager.Instance.tagsList.Contains(tag)) {
               Debug.Log("增加一个tag：" + tag);
               TagManager.Instance.tagsDictionary.Add(tag, new List<GameObject>());
               Debug.Log(tag + "增加一个物体" + gameObject.name);
               TagManager.Instance.tagsDictionary[tag].Add(gameObject);
            }
            else {
               Debug.Log(tag + "增加一个物体" + gameObject.name);
               TagManager.Instance.tagsDictionary[tag].Add(gameObject);
            }
         }
      }
   }
   //给物体删除tag
	public static void RemoveTag(this GameObject gameObject,params string[] tags) {
		for (int i = 0; i < tags.Length; i++) {
			if (gameObject.HasTag(tags[i])) {
				gameObject.GetComponent<Tags>().tags.Remove(tags[i]);
				Debug.Log(gameObject.name+"移除"+tags+"标签");
				TagManager.Instance.tagsDictionary[tags[i]].Remove(gameObject);
			}
			else {
				Debug.LogWarning(gameObject.name+"不存在"+tags[i]+"标签");
			}
		}
	}
}

gameObject.AddTag("Player","Tag1");
gameObject.HasTag("Player","Tag1");
gameObject.RemoveTag("Player");

public List<GameObject> FindObjsWithTag(string tag) {
    if (tagsDictionary.ContainsKey(tag)) {
        return tagsDictionary[tag];
    }
    Debug.Log("不存在标签为" + tag + "的物体");
    return null;
}

public class Tags : MonoBehaviour{
    public List<string> tags=new List<string>();
    void Start() {
        gameObject.AddTag(tags.ToArray());
        gameObject.HasTag("Player");
    }
    void Update(){
        if (Input.GeTKEyDown(KeyCode.A)) {
            gameObject.RemoveTag("Player","tag1");
        }
    }
}

[CreateAssetMenu]
public class TagsAsset : ScriptableObject{
    public List<string> tags=new List<string>();
}

[NonSerialized, OdinSerialize]
public Dictionary<string, List<GameObject>> tagsDictionary = new Dictionary<string, List<GameObject>>();