Tells the delegate that zooming of the content in the scroll view is about to commence.
- iOS 3.2+
- Mac Catalyst 13.0+
- tvOS 9.0+
The scroll-view object displaying the content view.
The view object whose content is about to be zoomed.
This method is called at the beginning of zoom gestures and in cases where a change in zoom level is to be animated. You can use this method to store state information or perform any additional actions prior to zooming the view’s content.