Bug: [iOS] Orientation seems able to be changed now

[Xanonymous-GitHub]

Describe the bug
The display orientation seems can be changed to landscape mode in all places, which is not allowed by our policy.

To Reproduce
Steps to reproduce the behavior:

1. go to course table page
2. check if it can show in landscape mode.

Expected behavior
not allowed landscape mode, except the video player page.

[Xanonymous-GitHub]

The problem is that even we used the SystemChrome.setPreferredOrientations([DeviceOrientation.portraitUp]);, the orientation is still able to be changed in iOS devices. There's a workaround: restrict the config to only the portrait mode in the Info.plist file, but that makes we can't change the orientation while we need it (the video player page.)

[Xanonymous-GitHub]

This is insane. Requested to dive into the native flutter code.
Native code land point: the SystemMethodChannel for the setPreferredOrientations method call. (iOS)

Flutter 3.7.2

  static Future<void> setPreferredOrientations(List<DeviceOrientation> orientations) async {
    await SystemChannels.platform.invokeMethod<void>(
      'SystemChrome.setPreferredOrientations',
      _stringify(orientations),
    );
  }

[Xanonymous-GitHub]

https://developer.apple.com/forums/thread/707735

https://developer.apple.com/documentation/uikit/uiviewcontroller/1621438-preferredinterfaceorientationfor