Get safe area inset top and bottom heights

What would be the most proper way to get both top and bottom height for the unsafe areas?

Try this :

In Objective C

if (@available(iOS 11.0, *)) {
    UIWindow *window = UIApplication.sharedApplication.windows.firstObject;
    CGFloat topPadding = window.safeAreaInsets.top;
    CGFloat bottomPadding = window.safeAreaInsets.bottom;
}

In Swift

if #available(iOS 11.0, *) {
    let window = UIApplication.shared.keyWindow
    let topPadding = window?.safeAreaInsets.top
    let bottomPadding = window?.safeAreaInsets.bottom
}

In Swift - iOS 13.0+

// Use the first element from windows array as KeyWindow deprecated

if #available(iOS 13.0, *) {
    let window = UIApplication.shared.windows.first
    let topPadding = window.safeAreaInsets.top
    let bottomPadding = window.safeAreaInsets.bottom
}

In Swift - iOS 15.0+

// Use the keyWindow of the currentScene

if #available(iOS 15.0, *) {
    let window = UIApplication.shared.currentScene?.keyWindow
    let topPadding = window.safeAreaInsets.top
    let bottomPadding = window.safeAreaInsets.bottom
}