UnityのNGUIでスクロールビューを作るのは、3系だとかなり簡単になっていた
- NGUI > Create > 2D UI
- NGUI > Create > Scroll View
- NGUI > Create > Sprite (then attach it as scroll view's child)
- add component "UIDragScrollView" to the sprite, then drop the scroll view to the script member "Scroll View"
- select the sprite then NGUI > Attach > Collider
It's scrollable!