Packages/com.unity.ugui/api/UnityEngine.EventSystems.IDropHandler

[docscomments[bot]]

Packages/com.unity.ugui/api/UnityEngine.EventSystems.IDropHandler

https://docs.unity3d.com/Packages/com.unity.ugui@latest/index.html?subfolder=/api/UnityEngine.EventSystems.IDropHandler.html

[radiatoryang]

If OnDrop doesn't seem to be working or firing, there are two ways to make it work:
OPTION 1: put a CanvasGroup on the dragged object, and disable "Blocks Raycast" when you begin dragging, and then re-enable it when you end dragging
OPTION 2: make sure the object accepting the drop is listed AFTER the dragged item in the hierarchy (order matters). That is, your hierarchy order should look like this:
Hierarchy:

• dragged item implementing IDragHandler
• drop area implementing IDropHandler