[UGUI]帧动画

ImageFrameAnimation.cs

using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;

[RequireComponent(typeof(Image))]
public class ImageFrameAnimation : MonoBehaviour {

    private Image image;
    private int nowFrame = 0;
    private float timer = 0;

    private List<Sprite> spriteList;
    private bool isPlay = false;
    private bool isForward = true;
    private bool isLoop = true;
    private float interval = 0.1f;
    
    void Update ()
    {
        if (!isPlay || (spriteList.Count == 0))
        {
            return;
        }

        timer += Time.deltaTime;
        if (timer > interval)
        {
            timer = 0;
            if (isForward)
            {
                nowFrame++;
            }
            else
            {
                nowFrame--;
            }

            if (nowFrame >= spriteList.Count)
            {
                if (isLoop)
                {
                    nowFrame = 0;
                }
                else
                {
                    isPlay = false;
                    return;
                }
            }
            else if(nowFrame < 0)
            {
                if (isLoop)
                {
                    nowFrame = spriteList.Count - 1;
                }
                else
                {
                    isPlay = false;
                    return;
                }
            }

            UpdateSprite();
        }
    }

    private void UpdateSprite()
    {
        UpdateSprite(nowFrame);
    }

    private void UpdateSprite(int index)
    {
        image.sprite = spriteList[index];
    }

    public void Init(Sprite[] spriteArray, bool isPlay = true, bool isForward = true, bool isLoop = true, float interval = 0.1f)
    {
        List<Sprite> spriteList = new List<Sprite>();
        spriteList.AddRange(spriteArray);
        Init(spriteList, isPlay, isForward, isLoop, interval);
    }

    public void Init(List<Sprite> spriteList, bool isPlay = true, bool isForward = true, bool isLoop = true, float interval = 0.1f)
    {
        this.spriteList = spriteList;
        this.isPlay = isPlay;
        this.isForward = isForward;
        this.isLoop = isLoop;
        this.interval = interval;

        if (image == null)
        {
            image = GetComponent<Image>();
        }
        if (isForward)
        {
            nowFrame = 0;
        }
        else
        {
            nowFrame = spriteList.Count - 1;
        }
        timer = 0;

        UpdateSprite();
    }

    public void Play()
    {
        isPlay = true;
        isForward = true;
    }

    public void PlayReverse()
    {
        isPlay = true;
        isForward = false;
    }

    public void Pause()
    {
        isPlay = false;
    }
}

 

测试：

using UnityEngine;
using System.Collections.Generic;
using UnityEngine.UI;

public class TestImageFrameAnimation : MonoBehaviour {

    public Image image;
    private ImageFrameAnimation ani;

    void Start ()
    {
        ani = image.gameObject.AddComponent<ImageFrameAnimation>();
        Sprite[] sprites = Resources.LoadAll<Sprite>("Num");
        ani.Init(sprites, true, true, true, 1);
    }

    private void Update()
    {
        if (Input.GetKeyDown(KeyCode.Q))
        {
            ani.Pause();
        }

        if (Input.GetKeyDown(KeyCode.W))
        {
            ani.PlayReverse();
        }
    }
}

 

效果：