uiscrollView passes touches to supwerview while bouncing

Placing multiple scroll views into a common container scroll view is actually pretty straightforward: Note that the table view’s frame (the light blue rectangle) is smaller than its content size (the dashed red outline), as is customary for scroll views. Cells that are not in view are removed from the view hierarchy (indicated here by the dashed blue outline) and get added to the view as the scroll into view. This design conserves significant amounts of memory in views with lots of cells and minimizes expensive view allocations, which is especially important during fast scrolling. Whenever a new cell is scrolled into view, the table view dequeues a cell from the reuse queue and re-adds it to the view hierarchy. As the view is scrolled, cells that scroll off the screen get removed from the view hierarchy and put into a reuse queue. However, a key difference is that table views and collection views reuse their cells. Both UITableView and UICollectionView are subclasses of UIScrollView, and they mostly behave like standard scroll views. These views can themselves be simple UIViews or UIScrollViews.īefore we take a look at the implementation, let’s review how table views and collection views work. Add header or footer views above or below a collection view without the need to have them managed by the collection view layout.Turn one complex UITableViewDataSource or UICollectionViewDataSource into multiple simple data sources by splitting a table or collection view with multiple sections into one view per section and placing them below each other.In the case of table and collection views, the built-in cell reuse functionality is not affected. Place multiple scroll views (or table views, or collection views) below each other so that their scrolling behavior still feels perfectly normal.You can use OLEContainerScrollView to achieve the following things: In this article, I am introducing OLEContainerScrollView, a UIScrollView subclass that allows you to add multiple scroll views, table views, or collection views to the same container. You should add any subviews you want managed by the container scroll view directly to its content view.

The container scroll view now exposes a read-only contentView property. Update June 30, 2014: Updated to reflect changes I made to OLEContainerScrollView’s public interface.

UiscrollView passes touches to supwerview while bouncing