using UnityEngine;
using System.Collections;
using UnityEngine.UI;// 我们当前代码强制要求要加入一个Image组件，
// 如果没有Image组件，那么自动加上，如果有就使用；
// 如果你的代码要求这个节点必须挂某个组件，那么
// 使用RequireComponent
[RequireComponent(typeof(Image))]public class frame_anim : MonoBehaviour {// 我们这个动画所需要的画面;public Sprite[] sprite_frames;// 帧动画的间隔时间public float duration = 0.1f;// 是否循环播放public bool is_loop = false;// 是否在加载的时候开始播放;public bool play_onload = false;private float played_time;private bool is_playing = false;private Image img;// Use this for initializationvoid Start () {this.img = this.GetComponent<Image>();if (this.play_onload) {if (this.is_loop) {this.play_loop();}else {this.play_once();}}}// 只播放一次void play_once() {if (this.sprite_frames.Length <= 1) {return;}this.played_time = 0;this.is_playing = true;this.is_loop = false;}// 循环播放void play_loop() {if (this.sprite_frames.Length <= 1) {return;}this.played_time = 0;this.is_playing = true;this.is_loop = true;}// 停止当前的动画播放void stop_anim() {this.is_playing = false;}// Update is called once per framevoid Update () {if (this.is_playing == false) {return;}// float dt = Time.deltaTime;this.played_time += dt;// 向下取整;int index = (int)(this.played_time / this.duration);if (this.is_loop == false) {// 结束了if (index >= this.sprite_frames.Length) { // 停止播放this.is_playing = false;this.played_time = 0;}else {this.img.sprite = this.sprite_frames[index];}}else {// 超过了范围，减掉一个周期while (index >= this.sprite_frames.Length) {this.played_time -= (this.duration * this.sprite_frames.Length);index -= this.sprite_frames.Length;}this.img.sprite = this.sprite_frames[index];}// end
    }
}