A floating-point value that specifies the current scale factor applied to the scroll view's content.
This value determines how much the content is currently scaled. The default value is
Zooming and Panning
var isZoomBouncing: Bool
A Boolean value that indicates that zooming has exceeded the scaling limits specified for the receiver.
var isZooming: Bool
A Boolean value that indicates whether the content view is currently zooming in or out.
var bouncesZoom: Bool
A Boolean value that determines whether the scroll view animates the content scaling when the scaling exceeds the maximum or minimum limits.