如何从编辑器脚本中的 MonoBehaviour 脚本访问和更新列表？答案

【问题标题】：How can I access and update a List from MonoBehaviour script in Editor script?如何从编辑器脚本中的 MonoBehaviour 脚本访问和更新列表？
【发布时间】：2020-01-16 14:33:37
【问题描述】：

MonoBehaviour 脚本：

using System.Collections;
using System.Collections.Generic;
using UnityEditor;
using UnityEngine;

public class PickupObjects : MonoBehaviour
{
    [SerializeField]
    public List<GameObject> pickUpObjects = new List<GameObject>();
}

还有编辑器脚本：

using System.Collections;
using System.Collections.Generic;
using UnityEditor;
using UnityEngine;

[CustomEditor(typeof(PickupObjects))]
public class PickupObjectsEditor : Editor
{
    [MenuItem("GameObject/Generate as Pickup Item", false, 30)]
    public static void GeneratePickupItems()
    {
        if (Selection.gameObjects.Length > 0)
        {
            for (int i = 0; i < Selection.gameObjects.Length; i++)
            {
                if (Selection.gameObjects[i].GetComponent<TestScript>() == null)
                {
                    Selection.gameObjects[i].AddComponent<BoxCollider>();
                    Selection.gameObjects[i].AddComponent<TestScript>();
                }

                Selection.gameObjects[i].layer = 9;
            }
        }
    }
}

我想在循环之后的编辑器脚本中将对象添加到 MonoBehaviour 中的列表中，这样我就可以在 MonoBehaviour 脚本的列表中看到现在被拾取的对象。

【问题讨论】：

标签： c# unity3d

【解决方案1】：

您正在使用Editor 冗余。至少如果它什么都不做。创建MenuItem 方法不需要它。

您不能直接执行此操作，因为您需要以某种方式引用您的 MonoBehaviour 实例。

一种选择是使用FindObjectOfType在场景中找到它

#if UNITY_EDITOR
using UnityEditor;
#endif

public class PickupObjects : MonoBehaviour
{
    [SerializeField]
    public List<GameObject> pickUpObjects = new List<GameObject>();

#if UNITY_EDITOR
    // This disabled the menu item as long as there is no instance of PickupObjects in the scene.
    [MenuItem("GameObject/Generate as Pickup Item", true, 30)]
    private static bool CanGeneratePickupItems()
    {
        return FindObjectOfType<PickupObjects>();
    }

    [MenuItem("GameObject/Generate as Pickup Item", false, 30)]
    private static void GeneratePickupItems()
    {
        var instance = FindObjectOfType<PicupObjects>();

        if(!instance) return;

        // Clear the list first? Otherwise selection will be added to already existing entries
        // (Duplicates are filtered out later below anyway)
        instance.pickupObjects.Clear();

        if (Selection.gameObjects.Length <= 0) return;

        foreach (var selectedObj in Selection.gameObjects)
        {
            if (selectedObj.GetComponent<TestScript>() == null)
            {       
                selectedObj.AddComponent<BoxCollider>();
                selectedObj.AddComponent<TestScript>();               
            }

            selectedObj.layer = 9;

            if(!instance.pickupObjects.Contains(selectedObj)) instance.pickupObjects.Add(selectedObj);
        }
    }
#endif
}

注意：在智能手机上输入，但我希望思路清晰

【讨论】：