Unity实现数字逐渐增加(一个数字动态变化到另一个数字，连续变化)_unity 数字增长动画

之前在手机上玩游戏，觉得加钱的时候，货币动态上涨的动画挺炫酷的，就手痒痒随手写了一个。

先上图看下效果

然后我又添加了两种增长方式

1.先快后慢的增长方式

这个增长曲线是正弦函数，所以看起来不是那么明显

2.先慢后快的增长方式

这个增长曲线是二次函数的曲线，所以会明显一点

写完之后发现dotween好像就能实现。。。。

原理什么的就不讲了，代码看一看就都能看懂

下面上代码，为了图方便，我把脚本都写在一个文件里了，按理说分开会好一点儿。

using UnityEngine;
using UnityEngine.UI;
using System.Text.RegularExpressions;
using System;
 
public class CountingNumber : MonoBehaviour
{
    public ChangeType changeType = ChangeType.Linear;
    Text mText;
    int startNum = 100;
    int currTime;
    int targetNum = 0;
    float duration = 0;
    bool isStartChange = false;
    float time = 0;
    ChangeTypeBase changeText;
 
 
    private void Start()
    {
        mText = transform.GetComponent<Text>();
        if (IsInt(mText.text))
            startNum = int.Parse(mText.text);
       
    }
 
    public void ChangeTo(int targetNum, float duration)
    {
        this.targetNum = targetNum;
        currTime = startNum;
        this.duration = duration;
        time = 0;
        isStartChange = true;
 
 
        switch (changeType)
        {
            case ChangeType.Linear:
                changeText = new LinearType(startNum,targetNum,duration);
                break;
            case ChangeType.Easein:
                changeText = new EaseinType(startNum, targetNum, duration);
                break;
            case ChangeType.Easeout:
                changeText = new EaseoutType(startNum, targetNum, duration);
                break;
            default:
                break;
        }
    }
 
    private void Update()
    {
        UpdateText();
        UpdateBehaviour();
    }
 
    void UpdateBehaviour()
    {
        if (Input.GetMouseButtonDown(1))
            ChangeTo(500, 3);
    }
 
    void UpdateText()
    {
        if (!isStartChange)
            return;
        time += Time.deltaTime;
        if (time>=duration)
        {
            mText.text = targetNum.ToString();
            startNum = targetNum;
            changeText = null;
            time = 0;
            isStartChange = false;
            return;
        }
        int cacheNum = startNum + changeText.ChangeText(time);
        if (cacheNum == currTime)
            return;
        currTime = cacheNum;
        mText.text = currTime.ToString();
    }
 
    public bool IsInt(string value)
    {
        return Regex.IsMatch(value, @"^[+-]?\d*$");
    }
}
 
 
public abstract class ChangeTypeBase
{
    protected int startNum;
    protected int targetNum;
    protected float duration;
    public ChangeTypeBase(int startNum, int targetNum, float duration)
    {
        this.startNum = startNum;
        this.targetNum = targetNum;
        this.duration = duration;
    }
 
    public abstract int ChangeText(float time);
}
 
 
public class LinearType : ChangeTypeBase
{
    public LinearType(int startNum, int targetNum, float duration) : base(startNum, targetNum, duration)
    {
    }
    public override int ChangeText(float time)
    {
        return (int)((targetNum -startNum) * (time / duration));
    }
}
 
 
public class EaseinType : ChangeTypeBase
{
    public EaseinType(int startNum, int targetNum, float duration) : base(startNum, targetNum, duration)
    {
    }
    public override int ChangeText(float time)
    {
        return (int)((targetNum - startNum) * (time / duration)* (time / duration));
    }
}
 
public class EaseoutType : ChangeTypeBase
{
    public EaseoutType(int startNum, int targetNum, float duration) : base(startNum, targetNum, duration)
    {
    }
    public override int ChangeText(float time)
    {
        return (int)((targetNum - startNum) * Math.Sin(Math.PI/2 * (time / duration)));
    }
}
 
 
 
 
 
public enum ChangeType
{
    Linear,
    Easein,
    Easeout,
}