更新了一下，支持数组和嵌套数据结构。

 

1 using UnityEngine; 2 using System.Collections; 3 using UnityEditor; 4 using System.Reflection; 5  6 [CustomPropertyDrawer(typeof(ObjectToPathAttribute))] 7 public class ObjectToPathDrawer : PropertyDrawer 8 { 9 10     public override void OnGUI(Rect position, SerializedProperty property, GUIContent label)11     {12         Object target = property.serializedObject.targetObject;13         ObjectToPathAttribute otpa = attribute as ObjectToPathAttribute;14         System.Type objType = otpa._objType;15 16         string path = property.stringValue;17         position.width = EditorGUIUtility.labelWidth * 2.0f / 3.0f;18 19         EditorGUI.LabelField(position, label);20         position.x += EditorGUIUtility.labelWidth * 2.0f / 3.0f;21 22         Object _obj = null;23         bool _foundObj = true;24         if (!string.IsNullOrEmpty(path))25         {26             _obj = AssetDatabase.LoadMainAssetAtPath(path);27             if (_obj == null)28             {29                 _foundObj = false;30             }31         }32         _obj = EditorGUI.ObjectField(position, _obj, objType, false);33         if (_obj != null)34         {35             path = AssetDatabase.GetAssetPath(_obj);36         }37         else38         {39             if (_foundObj)40             {41                 path = string.Empty;42             }43         }44         position.x += EditorGUIUtility.labelWidth * 2.0f / 3.0f;45         position.width = EditorGUIUtility.labelWidth;46         property.stringValue = EditorGUI.TextField(position, path);47     }48 }

1 using UnityEngine; 2 using System.Collections; 3  4 public class ObjectToPathAttribute : PropertyAttribute 5 { 6     public System.Type _objType; 7     public ObjectToPathAttribute(System.Type t) 8     { 9         _objType = t;10     }11 }

1 using UnityEngine;2 using System.Collections;3 4 public class TestClass : MonoBehaviour5 {6     [ObjectToPath(typeof(GameObject))]7     public string _prefabPath;8 }

 

 

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：