From 8d621561f3c0ab696cfc08dfea89c8ec7cc2e431 Mon Sep 17 00:00:00 2001
From: Jacob Su <suzp1984@gmail.com>
Date: Tue, 12 Sep 2023 07:25:06 +0800
Subject: [PATCH] fix ios samples missing functional header (#7153) (#7154)

1. ios sample: ios/samples/hello-gltf;
2. ios sample: ios/samples/hello-pbr;
---
 ios/samples/hello-gltf/hello-gltf/CameraManipulator.h | 2 ++
 ios/samples/hello-pbr/hello-pbr/CameraManipulator.h   | 2 ++
 2 files changed, 4 insertions(+)

diff --git a/ios/samples/hello-gltf/hello-gltf/CameraManipulator.h b/ios/samples/hello-gltf/hello-gltf/CameraManipulator.h
index 1eba71f247..95036e6b32 100644
--- a/ios/samples/hello-gltf/hello-gltf/CameraManipulator.h
+++ b/ios/samples/hello-gltf/hello-gltf/CameraManipulator.h
@@ -17,6 +17,8 @@
 #ifndef TNT_FILAMENT_SAMPLE_CAMERA_MANIPULATOR_H
 #define TNT_FILAMENT_SAMPLE_CAMERA_MANIPULATOR_H
 
+#include <functional>
+
 #include <math/vec2.h>
 #include <math/vec3.h>
 #include <math/vec4.h>
diff --git a/ios/samples/hello-pbr/hello-pbr/CameraManipulator.h b/ios/samples/hello-pbr/hello-pbr/CameraManipulator.h
index 1eba71f247..95036e6b32 100644
--- a/ios/samples/hello-pbr/hello-pbr/CameraManipulator.h
+++ b/ios/samples/hello-pbr/hello-pbr/CameraManipulator.h
@@ -17,6 +17,8 @@
 #ifndef TNT_FILAMENT_SAMPLE_CAMERA_MANIPULATOR_H
 #define TNT_FILAMENT_SAMPLE_CAMERA_MANIPULATOR_H
 
+#include <functional>
+
 #include <math/vec2.h>
 #include <math/vec3.h>
 #include <math/vec4.h>