自动定位功能

@@ -48,12 +48,16 @@ class ActivityController extends HomeBaseController
         } else {
             require_once EXTEND_PATH . '/WeChatCommon.php';
             $wx = new \WeChatCommon();
-            $pos = Db:: name('user')->field('lat,lng')->where(['id'=>session('user.id')])->find();
-            $return = json_decode(anti_analysis($pos['lat'], $pos['lng']), true);
+            if(empty(session('user.city'))) {
+                $pos = Db:: name('user')->field('lat,lng')->where(['id' => session('user.id')])->find();
+                $return = json_decode(anti_analysis($pos['lat'], $pos['lng']), true);
+                $city = $return['result']['address_component']['city'];
+                session('user.city', $city);
+            }
             return $this->fetch(':_list', [
                 'result' => $result,
                 'js_sdk' => $wx->js_sdk(),
-                'city' => $return['result']['address_component']['city']
+                'city' => session('user.city')
             ]);
         }
     }