Portrait and landscape in iPad are both regular size classes !?!

Question

Created Jul ’15

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I'm beginning to use all autolayout and size classes in my app. As advised, I'm looking for compact and regular size classes to handle different layout for different orientation for both iPhone and iPad. However, for iPad, the size classes are always regular, no matter if it's landscape or portrait. Apple advised us to not depend on orientation for laying out views but that's the only way to detect different orientations in iPad, size classes is not enough. I have a view that will display 2 rectangle side by side in landscape, but one below another in portrait.

Can someone tell me what is the best practices for this scenario?

Thanks

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Answer 1

KMT OP

Jul ’15

Which versions iOS are you supporting?

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Answer 2

junkpile OP

Jul ’15

I believe the only way is to use viewWillTransitionToSize and programmatically compare height vs. width to decide which layout to use. You then have to install / remove (or activate / deactivate) sets of constraints. With split screen multitasking, now there is a whole continuum of sizes from the current iPad landscape, through square, all the way to very skinny vertical. Initially I was quite disappointed they didn't allow you to distinguish without code but now it starts to make a bit more sense.

0

Answer 3

threepenguins OP

Jul ’15

I'm supporting iOS 8 and forward.

0

Answer 4

Erik OP

Aug ’16

As I understand it, the new API is meant to make it easy for (and encourage) developers to use a consistent layout, regardless of device orientation or other factors. Size classes provide an abstraction for determining layout without having to consider the window's bounds or other state information to figure out why its bounds have a particular size.

Still, for some apps there may be special cases where device orientation matters. If your app falls into this case, your view controller can override

viewWillTransition(to:with:)

and call the

animate(alongsideTransition:completion:)

method of the passed-in coordinator. Use the

targetTransform

property of the

UIViewControllerTransitionCoordinatorContext

instance passed as the animation's parameter to update the transform of each "orientation-aware" view or its content.

override func viewWillTransition(to size: CGSize, with coordinator: UIViewControllerTransitionCoordinator) {
    super.viewWillTransition(to: size, with: coordinator)

    let animation: (UIViewControllerTransitionCoordinatorContext) -> Void = { context in
        // use context.targetTransform to update your views, usually by applying a counter-rotation
    }

    coordinator.animate(alongsideTransition: animation)
}

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Answer 5

iQQator OP

Nov ’17

But not for Lauchscreen T___T Apple is sooo Apple ))))))

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