Virtualized List

The VirtualizedScrollRectList is a helper component that allows you to represent very large lists in ScrollRects without paying the cost for a very large number of GameObjects. This works by maintaining a number of GameObjects that completely cover the visible area of the ScrollRect, and reusing and repositioning them as the list scrolls up and down.

An example can be found in the VirtualizedScrollRectList scene.

Scripting

Using this is not quite as simple as adding it as a component to your ScrollRect, it also requires a bit of code to get going. Here's what you need to do:

• Call VirtualizedScrollRectList.SetItemCount to let it know how many items are in the virtualized list.
• Add your callbacks to OnVisible and OnInvisible, so you can populate the prefab with the data associated with the provided index.
• Update VirtualizedScrollRectList's representation of the Item Count as your list changes over time.

Note

VirtualizedScrollRectList recycles all of the GameObjects in the pool, and relies on you to (re)set any changes to the prefab with callbacks to the OnVisible and OnInvisible. In other words, the changes you make to the GameObject are not cleared by VirtualizedScrollRectList.

Prefab

You can set the desired prefab in the inspector. Every GameObject in the list will be an instance of this prefab.