How to Create/Delete Object by script in Editor Mode

Unity Engine
1

Hello Guys:
I’m currently writing a game manager that allows the user to Edit some basic status of a character before add it to the scene, I’m using the following script to create characters right now:

public class AddCharacter : EditorWindow
{
    GameObject obj = null;
    GameObject tempobj = null;
    Vector3 vec3 = new Vector3(0, 0, 0);
    CharacterClass classname = null;
    string objname = "";
    [MenuItem("Asset/TestCreate")]
    public static void ShowWindow()
    {
        var window = GetWindow<AddCharacter>();
        window.title = "Create Character";
    }
    public void OnGUI()
    {
        EditorGUILayout.BeginVertical();
        obj = EditorGUILayout.ObjectField("Select game object to place", obj, typeof(GameObject), true) as GameObject;
        vec3 = EditorGUILayout.Vector3Field("placement position:", vec3);
        objname = EditorGUILayout.TextField("Name for new Character: ", objname);

        if (obj && objname != "")
        {
            if (GUILayout.Button("Add to scene"))
            {
                tempobj = (GameObject)Instantiate(obj, vec3, Quaternion.identity);
                tempobj.name = objname;
                Characters temp = tempobj.GetComponent<Characters>();
                CharacterClass selectedclass = AIManager.Instance.GetNewCharInfo();
                temp.SetName(objname);
                temp.SetClass(selectedclass);
                temp.UpdateCharacter();
                selectedclass.AddCharacters(objname);
                AIManager.Instance.setnewChar(true);
                AIManager.Instance.CreateCharacters(objname);
                Close();
            }
        }
        else
        {
            EditorGUILayout.LabelField("You must select an object and give it a name first");
        }
        EditorGUILayout.EndVertical();
    }
}

However, I found that everything I created by using this script would disappear when I reopen the project, so is there a way to keep those changes( Add or delete game objects by script) in Unity?

2

I believe you are looking for Unity’s Undo.RecordObject() method.