The underlying gesture recognizer for pinch gestures.
Your application accesses this property when it wants to more precisely control which pinch gestures are recognized by the scroll view.
Zooming and Panning
var zoomScale: CGFloat
A floating-point value that specifies the current scale factor applied to the scroll view's content.
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.