If you have an app with widgets, be sure to check how the widgets look after compiling with Xcode 15.

The new .widgetContentMargins are a nice addition, but I found adopting them in a way that allows the widgets to continue working well under iOS 16 to be a significant undertaking.

The new .contentMarginsDisabled() modifier on WidgetConfiguration is supposed to do nothing on iOS 16, but it makes the widget extension crash on iOS 16. Here is a modifier you can use instead:

extension WidgetConfiguration {

    func `contentMarginsDisabledOnNewOperatingSystem`() -> some WidgetConfiguration {
        if #available(iOSApplicationExtension 17.0, *) {
            return self.contentMarginsDisabled()
        } else {
            return self
        }
    }

}

Since .contentMarginsDisabled() is applied at the WidgetConfiguration level, .contentMarginsDisabled() cannot apply to just one size of a widget.