EditorGUI.MaskField实现多选枚举

效果

枚举

public enum MyFontStyle
{
    Bold,
    Italic,
    Outline,
}

public enum MyFontStyleMask
{
    Bold = 1,
    Italic = 1 << 1,
    Outline = 1 << 2,
}

标签类

using UnityEngine;

public class MyEnumMaskAttribute : PropertyAttribute
{
}

Property Drawer

#if UNITY_EDITOR

using System;
using UnityEditor;
using UnityEngine;

[CustomPropertyDrawer(typeof(MyEnumMaskAttribute))]
public class MyEnumMaskPropertyDrawer : PropertyDrawer
{

    public override void OnGUI(Rect position, SerializedProperty sp, GUIContent label)
    {
        var fieldType = fieldInfo.FieldType;
        if (!typeof(Enum).IsAssignableFrom(fieldType))
        {
            position = EditorGUI.PrefixLabel(position, label);
            EditorGUI.LabelField(position, $"not Enum Type: {fieldType.Name}");
        }
        else
        {
            string[] displayOpts = sp.enumNames;
            sp.intValue = EditorGUI.MaskField(position, label, sp.intValue, displayOpts);
        }
    }

}

#endif

测试代码

public class MyEnumMaskTest : MonoBehaviour
{
    [MyEnumMask]
    public int m_Value;

    [MyEnumMask]
    public MyFontStyle m_FontStyleFlags;

    [MyEnumMask]
    public MyFontStyleMask m_FontStyleFlags2;

    void Start()
    {
        Debug.Log($"{(int)m_FontStyleFlags}, {Convert.ToString((int)m_FontStyleFlags, 2).PadLeft(32, '0')}");
        Debug.Log($"Bold: {IsBitChecked(MyFontStyle.Bold)}");
        Debug.Log($"Italic: {IsBitChecked(MyFontStyle.Italic)}");
        Debug.Log($"Outline: {IsBitChecked(MyFontStyle.Outline)}");

        Debug.Log($"==========");

        Debug.Log($"{(int)m_FontStyleFlags2}, {Convert.ToString((int)m_FontStyleFlags2, 2).PadLeft(32, '0')}");
        Debug.Log($"Bold: {0 != (m_FontStyleFlags2 & MyFontStyleMask.Bold)}");
        Debug.Log($"Italic: {0 != (m_FontStyleFlags2 & MyFontStyleMask.Italic)}");
        Debug.Log($"Outline: {0 != (m_FontStyleFlags2 & MyFontStyleMask.Outline)}");
    }

    private bool IsBitChecked(MyFontStyle bit)
    {
        int mask = 1 << (int)bit;
        return 0 != ((int)m_FontStyleFlags & mask);
    }

}

 

参考

Unity 编辑器扩展十 多选枚举 - 简书 (jianshu.com)

位枚举：枚举类型 - C# 参考 - C# | Microsoft Learn

unity 多选枚举 - 露夕逝 - 博客园 (cnblogs.com)