diff --git a/readme.md b/readme.md
index 0134862..087e475 100644
--- a/readme.md
+++ b/readme.md
@@ -24,6 +24,28 @@ class BitFlagBehavior extends Behavior
      * @var array[] $bitFlags 位标志映射表
      */
     public $bitFlags = [];
+    /**
+     * @var array
+     */
+    private $_attributes = [];
+
+    /**
+     * {@inheritdoc}
+     */
+    public function init()
+    {
+        parent::init();
+        $this->initAttributes();
+    }
+
+    /**
+     * 初始化属性数组
+     */
+    private function initAttributes()
+    {
+        $keys = array_merge(...array_values($this->bitFlags));
+        $this->_attributes = array_fill_keys($keys, null);
+    }
 
     public function events()
     {
@@ -94,6 +116,38 @@ class BitFlagBehavior extends Behavior
         }
         return $bitFlagValue;
     }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function __get($name)
+    {
+        return $this->_attributes[$name];
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function __set($name, $value)
+    {
+        $this->_attributes[$name] = $value;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function canGetProperty($name, $checkVars = true)
+    {
+        return parent::canGetProperty($name, $checkVars) || ArrayHelper::keyExists($name, $this->_attributes);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function canSetProperty($name, $checkVars = true)
+    {
+        return parent::canSetProperty($name, $checkVars) || ArrayHelper::keyExists($name, $this->_attributes);
+    }
 }
 ```
 
@@ -107,18 +161,6 @@ use {yourApp}\behaviors\BitFlagBehavior;
  
 class MyModel extends base\MyModel
 {
-    /**
-     * @var int 状态
-     */
-    public $s0;
-    public $s1;
-    public $s2;
-    public $s3;
-    public $s5;
-    public $s6;
-    public $s7;
-    public $s8;
-
     /**
      * 位标志映射表：
      * [
@@ -144,10 +186,10 @@ class MyModel extends base\MyModel
     {
         $fields = parent::fields();
         $flagFields = [];
-        foreach (self::BIT_FLAGS as $bitFlag) {
-            $flagFields = ArrayHelper::merge($flagFields, array_combine($bitFlag, $bitFlag));
+        foreach (self::BIT_FLAGS as $bitFlag => $flags) {
+            $flagFields = ArrayHelper::merge($flagFields, array_combine($flags, $flags));
+            unset($fields[$bitFlag]);
         }
-        unset($fields['bit_flag']);
         return ArrayHelper::merge($fields, $flagFields);
     }