解决getreplaybarrage接口返回的不是json格式的问题

@@ -70,6 +70,7 @@ class BaseController extends Controller
                 'md5'       => md5(strval($data))
             ];
         }
+        header('Content-type: application/json;charset=utf-8');
         Yii::$app->response->format = \yii\web\Response::FORMAT_JSON;
         echo json_encode($retData);
         Yii::$app->end();