Version: 2017.2
public void OnBeginDrag (EventSystems.PointerEventData eventData);

Description

Handling for when the content is beging being dragged.

using UnityEngine;
using System.Collections;
using UnityEngine.EventSystems; // Required when using event data

public class ExampleClass : MonoBehaviour, IBeginDragHandler // required interface when using the OnBeginDrag method. { //Do this when the user starts dragging the element this script is attached to.. public void OnBeginDrag(PointerEventData data) { Debug.Log("They started dragging " + this.name); } }