using UnityEngine;

using System.Collections;

public class EnumFlagsAttribute : PropertyAttribute {}

using UnityEngine;

using System.Collections;

using UnityEditor;

[CustomPropertyDrawer(typeof(EnumFlagsAttribute))]

public class EnumFlagsAttributeDrawer : PropertyDrawer {

    public override void OnGUI(Rect position, SerializedProperty property, GUIContent label)

    {

        /*

         * 绘制多值枚举选择框,0 全部不选, -1 全部选中, 其他是枚举之和

         * 枚举值 = 当前下标值 ^ 2

         * 默认[0^2 = 1 , 1 ^2 = 2,  4, 16 , .....]

         */

        property.intValue = EditorGUI.MaskField(position, label, property.intValue

                                                , property.enumNames);

        Debug.Log("图层的值:" + property.intValue);

    }

}

using UnityEngine;

using System.Collections;

public enum LayerMeskEnum

{

    Layer1,

    Layer2,

    Layer3,

    Layer4,

}

public class MyCompoment : MonoBehaviour {

    [EnumFlagsAttribute]

    public LayerMeskEnum layer;

}