通过拖拽prefab来存储相应的路径

 更新了一下，支持数组和嵌套数据结构。

 

using UnityEngine;
using System.Collections;
using UnityEditor;
using System.Reflection;

[CustomPropertyDrawer(typeof(ObjectToPathAttribute))]
public class ObjectToPathDrawer : PropertyDrawer
{

    public override void OnGUI(Rect position, SerializedProperty property, GUIContent label)
    {
        Object target = property.serializedObject.targetObject;
        ObjectToPathAttribute otpa = attribute as ObjectToPathAttribute;
        System.Type objType = otpa._objType;

        string path = property.stringValue;
        position.width = EditorGUIUtility.labelWidth * 2.0f / 3.0f;

        EditorGUI.LabelField(position, label);
        position.x += EditorGUIUtility.labelWidth * 2.0f / 3.0f;

        Object _obj = null;
        bool _foundObj = true;
        if (!string.IsNullOrEmpty(path))
        {
            _obj = AssetDatabase.LoadMainAssetAtPath(path);
            if (_obj == null)
            {
                _foundObj = false;
            }
        }
        _obj = EditorGUI.ObjectField(position, _obj, objType, false);
        if (_obj != null)
        {
            path = AssetDatabase.GetAssetPath(_obj);
        }
        else
        {
            if (_foundObj)
            {
                path = string.Empty;
            }
        }
        position.x += EditorGUIUtility.labelWidth * 2.0f / 3.0f;
        position.width = EditorGUIUtility.labelWidth;
        property.stringValue = EditorGUI.TextField(position, path);
    }
}

using UnityEngine;
using System.Collections;

public class ObjectToPathAttribute : PropertyAttribute
{
    public System.Type _objType;
    public ObjectToPathAttribute(System.Type t)
    {
        _objType = t;
    }
}

using UnityEngine;
using System.Collections;

public class TestClass : MonoBehaviour
{
    [ObjectToPath(typeof(GameObject))]
    public string _prefabPath;
}

 

 

使用上面的代码可以通过拖拽一个prefab的方式把相应的路径直接存储到public string _itemPerfabPath里，省去键盘输入步骤。不支持场景中的GameObject的拖入。

截图如下：

当prefab为空的时候的截图如下：