I created a completely new, single-view iOS universal Swift app. Then, I unchecked \"Landscape Left\" and \"Landscape Right\" in the app settings. I ran it on my iPhone, and hoo
In Xcode 10 at least, for a universal app this feature is broken. For a universal app setting the orientation restriction by checking the relevant orientation only works for iPhone, you will need to go into the plist and remove the unwanted orientations under "Supported interface orientations (iPad)", where you will find all four orientations awaiting you regardless of what you checked. It's simply a bug in Xcode that apparently doesn't have a very high priority since it's been around for a while.