Extra bottom space/padding on iPhone X?

user_5941812 0
Viewed 47696

On the iPhone X in portrait mode, if you set a bottom constraint to safe area to 0, you will end up with an extra space at the bottom of the screen. How do you get programmatically the height of this extra padding ?

I managed to manually determine the height of this padding which is 34 and here is how I managed to implement it with iPhone X detection:

Swift 4.0 and Xcode 9.0

if UIDevice().userInterfaceIdiom == .phone
{
    switch UIScreen.main.nativeBounds.height
    {
        case 2436: //iPhone X
        self.keyboardInAppOffset.constant = -34.0
        default:
        self.keyboardInAppOffset.constant = 0
    }
}

Is there a cleaner way to detect the height of this padding ?

iphone-x swift iphone ios
7 Answers

In Objective-C

if (@available(iOS 11.0, *)) {
   UIWindow *window = UIApplication.sharedApplication.keyWindow;
   CGFloat bottomPadding = window.safeAreaInsets.bottom;
}
user_67884190 
var bottomPadding: CGFloat = 0.0
if #available(iOS 11.0, *) {
     let window = UIApplication.shared.keyWindow
     bottomPadding = window?.safeAreaInsets.bottom ?? 0.0
}

Now you can use bottomPadding as per your needs.

user_16032340

If suddenly you have no view, for example, CollectionViewLayout, you can retrieve it from Window too:

private static var itemHeight: CGFloat {
    guard #available(iOS 11.0, *),
        let window = UIApplication.shared.keyWindow else {
            return Constants.itemHeight
    }
    return Constants.itemHeight - window.safeAreaInsets.bottom
}
user_32374920

iOS 13+ (a mix from answers above)

let padding = UIApplication.shared.windows.first?.safeAreaInsets.bottom ?? 0
user_88452530 
UIApplication.shared.windows.first?.safeAreaInsets.bottom ?? 0.0

iOS 13 and up

user_104476550

use this line to become your bottom value for iPhoneX

if #available(iOS 11.0, *) {
            let bottomPadding = view.safeAreaInsets.bottom
  }

and don't forget to add this in layoutSubviews() because safeAreaInsets has the correct size in layoutSubviews() otherwise you will become wrong values.

user_51831970
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