Portrait-Mode | Portrait mode on webcam | QRCode Processing library

How to achieve portrait mode like blurring the background of image in video of people programmatically, this feature exists in IOS natively now since the last update, I think we can achieve this using something like openGL shader or something or some setting in Camera2 API, the thing is I does not look straight forward at all. any help would be appreciated, https://www.xda-developers.com/how-to-use-portrait-mode/ this link has an image as an example of what I am trying to achieve, the article is not technical and not mentioning anything related to programming.

I am updating an old iPad app, but I'm unable to stop iOS from rotating a controller that should only be viewed in portrait mode. The app has a UISplitViewController, but at one point I need to present another controller fullscreen in portrait mode regardless of whether the iPad was in portrait or landscape before.

I have two issues:

• If the UI was in landscape mode, the portrait view controller also appears in landscape
• The rotation is no longer blocked, so the user can rotate the device even if the controller was displayed in the correct orientation

The documentation says that all rotation-related methods were deprecated in iOS 8, and instead iOS will call viewWillTransitionToSize on the window's root viewcontroller. I am therefore calling [window setRootViewController] to setup my portrait-only controller, and indeed iOS calls viewWillTransitionToSize on my controller. However, at that point it's already too late! I need to stop the transition before it begins.

After spending many hours googling and trying variations, I am no closer to a solution – there is so much old stuff on the 'net (and here on Stack Overflow) that it's really hard to find current information.

I have tried setting modalPresentationStyle = UIModalPresentationFullScreen both in viewDidLoad, viewWillAppear and viewDidAppear, and then overriding preferredInterfaceOrientationForPresentation. My override is never called.

I still have the old methods supportedInterfaceOrientations, shouldAutorotate and shouldAutorotateToInterfaceOrientation, but none of them is ever called.

I tried implementing application:supportedInterfaceOrientationsForWindow in my app delegate, but the method is never called. (from the answers to this question)

What's the correct way of doing this on iOS 14? Should I use a modal full-screen presentation? Or use the trait environment with UITraitCollection somehow?

I am trying to print a webpage (that I have no control over) in landscape orientation using the chrome browser.

As you can see here:

Chrome Print dialogue not offering fit to page, landscape, other printing options

This is a long standing issue.

However, one commenter suggested using css to fix the issue.

Adding following css to your webapp fixes this issue. Google shows Layout options after this fix.

@page { size: landscape; }

I was thinking I could perhaps use developer tools to add that bit of css in, but I am too unfamiliar with css to get it to work.

Can someone explain how/where exactly to add this to the page's style using dev tools to get it to be landscape? I can add css following these directions, but I suspect I am not adding it in the correct place.

I couldn't find a style which requested portrait to change or remove, but I am sure there are many ways to do that which I am unfamiliar with.

EDIT:

Per @Rojo I was able to use the method here to add the css. Further using this, I was able to make the code a snippet, so I can rerun it whenever I need to on any misbehaving page.

Here is the snippet code:

I am currently facing the problem where the whole content of my DialogFragment disappears when I change the screen orientation to landscape mode.

fragment_dartboard.xml

I'm creating an iPhone-only app using the latest version of Swift and Xcode, with 3 tabBar sections in the app, and in only one tab bar I want the user to have its screen fixed to landscape. I've tried almost all possible solutions I found on StackOverflow and some other websites, all not seeming to work(including this one: How to lock orientation of one view controller to portrait mode only in Swift). Anyone know why?

This is the view controller of the view that I want to be fixed in landscape orientation: