数字テキストを良い感じにアニメーションさせて表示するやつ http://anz-note.tumblr.com/post/145157295266

Number.cs

/*********************************
 * 数字テキストを良い感じにアニメーションして
 * 表示するやーつ
*********************************/
using System.Collections.Generic;

using UnityEngine;
using UnityEngine.UI;

using DG.Tweening;

public class Number : MonoBehaviour
{
    /// <summary>
    /// 表示する値
    /// </summary>
    [SerializeField] private int value;
    /// <summary>
    /// 文字色
    /// </summary>
    [SerializeField] private Color textColor = Color.white;
    /// <summary>
    /// フォント
    /// </summary>
    [SerializeField] private Font textFont;
    /// <summary>
    /// 表示したときのアニメーションタイプ
    /// </summary>
    [SerializeField] private DisplayAnimation currentAnimation = DisplayAnimation.None;
    /// <summary>
    /// 開始時にアニメーションするかどうか
    /// 開始時は表示するだけで、更新した時だけアニメーションしたい場合はfalse
    /// </summary>
    [SerializeField] private bool animateWhenStart = false;

    public enum DisplayAnimation {
        None, Wave, Scale, Rotate
    }

    private RectTransform rectTransform;
    private List<NumberText> list;
    private GameObject template;
    private List<Vector2> sizeList;
    private float startX = 0;

    public int Value {
        get { return this.value; }
        set {
            this.value = value;
            UpdateValue(this.currentAnimation);
        }
    }
    public DisplayAnimation CurrentAnimation {
        get { return this.currentAnimation; }
        set { this.currentAnimation = value; }
    }

    private void Awake()
    {
        this.rectTransform = this.gameObject.GetComponent<RectTransform>();
        this.list = new List<NumberText>();
        this.sizeList = new List<Vector2>();
    }

    private void Start()
    {
        this.template = CreateTemplateText();
        PreLoadSize();

        UpdateValue(this.animateWhenStart ? this.currentAnimation : DisplayAnimation.None);
    }

    /// <summary>
    /// 値を更新して表示（アニメーション指定があれば実行する）
    /// </summary>
    private void UpdateValue(DisplayAnimation animation)
    {
        var str = this.value.ToString();
        this.startX = this.rectTransform.rect.width * -0.5f;
        for (int i = 0; i < str.Length; i++) {
            var s = str[i];
            NumberText text;
            if (this.list.Count > i) {
                // 既存Text再利用
                text = this.list[i];
            } else {
                // Text作って表示して保持
                text = CreateText();
                this.list.Add(text);
            }
            text.text = s.ToString();
            AdjustRect(text.gameObject, int.Parse(s.ToString()), i);

            switch (animation) {
                case DisplayAnimation.Wave:
                    text.AnimateWave(0.1f * i);
                    break;
                case DisplayAnimation.Scale:
                    text.AnimateScale(0.1f * i);
                    break;
                case DisplayAnimation.Rotate:
                    text.AnimateRotate(0.2f * i);
                    break;
                case DisplayAnimation.None:
                default:
                    // なにもなし
                    break;
            }
        }

        // 余分なやつを消す
        for (int i = str.Length; i < this.list.Count; i++) {
            this.list[i].gameObject.SetActive(false);
        }
    }

    /// <summary>
    /// 新たにText入れ物をつくる
    /// </summary>
    /// <returns>The text.</returns>
    private NumberText CreateText()
    {
        var gameObject = Instantiate(this.template) as GameObject;
        gameObject.SetActive(true);
        gameObject.transform.SetParent(this.gameObject.transform);
        return gameObject.GetComponent<NumberText>();
    }

    /// <summary>
    /// テンプレートテキストをつくる
    /// </summary>
    /// <returns>The template text.</returns>
    private GameObject CreateTemplateText()
    {
        int fontSize = (int)(this.rectTransform.rect.height * 0.8);
        var gameObject = new GameObject();
        gameObject.name = "Template";
        var text = gameObject.AddComponent<NumberText>();
        text.color = this.textColor;
        text.font = this.textFont;
        text.fontSize = fontSize;
        text.alignment = TextAnchor.MiddleCenter;
        gameObject.SetActive(false);
        gameObject.transform.SetParent(this.gameObject.transform);
        return gameObject;
    }

    /// <summary>
    /// 位置調整
    /// </summary>
    /// <param name="text">Text.</param>
    /// <param name="value">Value.</param>
    /// <param name="position">Position.</param>
    private void AdjustRect(GameObject text, int value, int position)
    {
        var size = this.sizeList[value];
        var rectTransform = text.gameObject.GetComponent<RectTransform>();
        rectTransform.sizeDelta = size;
        this.startX += (size.x * (position == 0 ? 0.5f : 1f));
        rectTransform.localPosition = new Vector2(this.startX, 0);
    }

    /// <summary>
    /// 各数字の横幅を一気に取得しておく
    /// </summary>
    private void PreLoadSize()
    {
        var generator = new TextGenerator();
        var settings = this.template.GetComponent<Text>().GetGenerationSettings(Vector2.zero);
        for (int i = 0; i < 10; i++) {
            var width = generator.GetPreferredWidth(i.ToString(), settings);
            this.sizeList.Add(new Vector2(width, this.rectTransform.rect.height));
        }
    }
}
    

class NumberText: Text
{
    public void AnimateWave(float delay)
    {
        var rectTransform = this.gameObject.GetComponent<RectTransform>();
        var seq = DOTween.Sequence();
        seq.Append(rectTransform.DOLocalMoveY(5f, 0.2f).SetDelay(delay));
        seq.Append(rectTransform.DOLocalMoveY(0f, 0.1f));
    }

    public void AnimateScale(float delay)
    {
        var rectTransform = this.gameObject.GetComponent<RectTransform>();
        var seq = DOTween.Sequence();
        seq.Append(rectTransform.DOScale(1.4f, 0.2f).SetDelay(delay));
        seq.Append(rectTransform.DOScale(1f, 0.1f));
    }

    public void AnimateRotate(float delay)
    {
        var rectTransform = this.gameObject.GetComponent<RectTransform>();
        rectTransform.DOLocalRotate(new Vector3(0, 360, 0), 0.4f, RotateMode.FastBeyond360)
            .SetDelay(delay)
            .OnComplete(() => {
                rectTransform.localRotation = Quaternion.Euler(0, 0, 0);
            });
    }
}