today_extension_4.swift

    func widgetActiveDisplayModeDidChange(_ activeDisplayMode: NCWidgetDisplayMode, withMaximumSize maxSize: CGSize)
    {
        if activeDisplayMode == .expanded
        {
            preferredContentSize = CGSize(width: 0.0, height: 300.0)
        }
        else
        {
            preferredContentSize = maxSize
        }
    }