maximumZoomScale
MaximumZoomScale is a numeric property that defines the largest zoom factor allowed for zoomable content in many user interface toolkits. It sets an upper bound on the current zoom level, typically used with scrollable or pan-zoom containers. When a user performs pinch-zoom gestures or when code changes the zoom level programmatically, the resulting zoom scale will be clamped to the range between minimumZoomScale and maximumZoomScale.
In iOS, maximumZoomScale is a property of UIScrollView (type CGFloat). The default is 1.0. It should be
Setting maximumZoomScale to a value larger than the content can effectively zoom in until the content size
Programmatically, use setZoomScale:animated: with a value within the allowed range to change the zoom without user
Example: a scroll view with minimumZoomScale = 0.5 and maximumZoomScale = 4.0 allows zoom from half size to
Interaction considerations: zooming is often constrained by the content size and the layout of subviews; extremely