Overridden by subclasses to customize the default behavior when a finger touches down in displayed content.
- iOS 2.0+
- Mac Catalyst 13.0+
- tvOS 9.0+
A set of
UITouchinstances that represent the touches for the starting phase of the event represented by
An object representing the event to which the touch objects in
The subview in the content where the touch-down gesture occurred.
NO if you don’t want the scroll view to send event messages to
view. If you want
view to receive those messages, return
YES (the default).
The default behavior of
UIScroll is to invoke the
UIResponder event-handling methods of the target subview that the touches occur in.