优化角色

app/Modules/Book/Services/BookConfigService.php

@@ -43,7 +43,7 @@ class BookConfigService
             if($bids)
             {
                 $books = BookConfig::getSimpleBooksByIds($bids);
-                $books && $book = array_shift($books);
+                $books && $book = $books[0];
             }
         }
         return $book;