[UI] 초기 강화 화면 스크롤뷰 적용 및 배치

Assets/2. Scripts/ScrollRectSnap.cs

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+using UnityEngine;
+using System.Collections;
+using UnityEngine.UI;
+using UnityEngine.EventSystems;
+
+public class ScrollRectSnap : ScrollRect {
+	public int horizontalPages = 3; // horizontalの分割数
+	public int verticalPages = 3;  // verticalの分割数
+
+	[SerializeField] private float smooth = 10f;  // スナップ係数
+	private Vector2 targetPosition; // スナップ先座標
+	private bool isDrag = false; // フラグ
+
+	protected override void Start(){
+		base.Start ();
+		normalizedPosition = content.GetComponent<RectTransform> ().pivot;
+		targetPosition = GetSnapPosition ();
+	}
+
+	void Update(){
+		if (!isDrag && normalizedPosition != targetPosition) {
+			normalizedPosition = Vector2.Lerp (normalizedPosition, targetPosition, smooth * Time.deltaTime);
+		}
+	}
+
+	public override void OnBeginDrag(PointerEventData eventData){
+		base.OnBeginDrag (eventData);
+		isDrag = true;
+	}
+
+	public override void OnEndDrag(PointerEventData eventData){
+		base.OnEndDrag (eventData);
+		targetPosition = GetSnapPosition ();
+		isDrag = false;
+	}
+		
+	// スナップ先座標を取得する
+	Vector2 GetSnapPosition(){
+		float x = 0, y = 0;
+		Vector2 center;
+
+		if(horizontal){
+			if(horizontalPages > 1){
+				for (int page = 0; page < horizontalPages; page ++) {
+					center.x = (2f * page - 1f) / ((horizontalPages - 1f) * 2f);
+					if(horizontalNormalizedPosition >= center.x){
+						x = page / (horizontalPages - 1f);
+					}
+				}
+			}
+		}else{
+			x = horizontalNormalizedPosition;
+		}
+
+		if(vertical){
+			if(verticalPages > 1){
+				for (int page = 0; page < verticalPages; page ++) {
+					center.y = (2f * page - 1f) / ((verticalPages - 1f) * 2f);
+					if(verticalNormalizedPosition >= center.y){
+						y = page / (verticalPages - 1f) ;
+					}
+				}
+			}
+		}else{
+			y = verticalNormalizedPosition;
+		}
+		return new Vector2 (x, y);
+	}
+}