add

Assets/CoolapeFrame/3rd/UnityEditorHelper/Editor/PropertyDrawer/LayerPropertyDrawer.cs

@@ -0,0 +1,20 @@
+using UnityEngine;
+using UnityEditor;
+
+namespace UnityEditorHelper
+{
+    [CustomPropertyDrawer(typeof (LayerAttribute))]
+    public class LayerPropertyDrawer : PropertyDrawer
+    {
+        public override void OnGUI(Rect position, SerializedProperty property, GUIContent label)
+        {
+            if (property.propertyType != SerializedPropertyType.Integer)
+            {
+                Debug.LogWarning("LayerAttribute can only be applied on integer properties/fields");
+                return;
+            }
+
+            property.intValue = EditorGUI.LayerField(position, property.name, property.intValue);
+        }
+    }
+}