更新

app/Http/Controllers/Api/UserController.php

@@ -45,7 +45,7 @@ class UserController extends Controller
      * 选择性别
      */
     public function checksex(Request $request){
-        $file = $request;
+        $file = $request->post();
         return response()->json(['data' => $file]);
         $user = auth('api')->user();
         $validator = Validator::make($request->all(), [