Default value is true.

By default, a UIKit.UIScrollView intercepts touches before they propagate to subviews and, if a scrolling gesture is made, cancels those touches from being passed to the underlying UIKit.UIView (instead, both the UIKit.UIScrollView and the UIKit.UIView subview receive UIResponder.TouchesCancelled events). By setting this property to false, the application developer specifies that touches immediately propagate to the underlying UIKit.UIView. This can avoid potentially-perceptible delays in activating subviews, but makes it impossible for the UIKit.UIScrollView to recognize scrolling and panning gestures. In this situation, it is up to the application developer to develop a logical and consistent model for scrolling. This may involve the use of UIKit.UIGestureRecognizers, overriding UIScrollView.TouchesShouldBegin, UIScrollView.TouchesShouldCancelInContentView