我希望能够改变方向只编程。写函数，旋转屏幕，因为我想要的。

UIInterfaceOrientation toIOSOrientation(ScreenOrientation desiredOrientaion) {
    if (desiredOrientaion == ScreenOrientation::Landscape || desiredOrientaion == ScreenOrientation::LandscapeReversed) {
        return UIInterfaceOrientation::UIInterfaceOrientationLandscapeLeft;
    } else if (desiredOrientaion == ScreenOrientation::Portrait) {
        return UIInterfaceOrientation::UIInterfaceOrientationPortrait;
    } else {
        return UIInterfaceOrientation::UIInterfaceOrientationPortrait;
    }
}

void iOSTools::changeOrientation(ScreenOrientation desiredOrientaion) {
    NSNumber* value = [NSNumber numberWithInt:toIOSOrientation(desiredOrientaion)];
    [[UIDevice currentDevice] setValue:value forKey:@"orientation"];
    [UIViewController attemptRotationToDeviceOrientation];
}

但是我必须打开应用程序清单中的两个方向：

<key>UISupportedInterfaceOrientations</key>
<array>
    <string>UIInterfaceOrientationPortrait</string>
    <string>UIInterfaceOrientationLandscapeLeft</string>
</array>

如果我这样做，用户可以使用这两个方向。如果我想禁止这一点，我必须重写this函数，但我应该如何在Qt中这样做？