ios - UIView iOS 上的可拖动行为的名称是什么？

Question

iOS 中的大多数 View 都是可拖动的，就像在 Safari 中一样，我可以拖动它，当我释放它时它会弹回原位。此行为称为什么引用。

Answer 1

您想实现 UIScrollView .

The central notion of a UIScrollView object (or, simply, a scroll view) is that it is a view whose origin is adjustable over the content view. It clips the content to its frame, which generally (but not necessarily) coincides with that of the application’s main window. A scroll view tracks the movements of fingers and adjusts the origin accordingly. The view that is showing its content “through” the scroll view draws that portion of itself based on the new origin, which is pinned to an offset in the content view. The scroll view itself does no drawing except for displaying vertical and horizontal scroll indicators. The scroll view must know the size of the content view so it knows when to stop scrolling; by default, it “bounces” back when scrolling exceeds the bounds of the content.