Unity　uGUIをドラッグで動かしてステージを選ぶ ref: https://qiita.com/tsuzuki817/items/659a20ff57c83a022560

file0.txt

using UnityEngine;
using UnityEngine.EventSystems;

public class SlideController : MonoBehaviour, IDragHandler {

    public RectTransform m_rectTransform = null;

    public void OnDrag(PointerEventData eventData)
    {
        m_rectTransform.position += new Vector3(eventData.delta.x*0.01f, 0f, 0f);
    }
}