unity 利用ugui 制作技能冷却效果

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

public class SkillItem : MonoBehaviour {

//冷却时间
public float coldTime = 2.0f;

//定时器
private float timer = 0f;

//前面的一张填充图片
private Image filedImage;

//是否开始技能冷却
private bool isStartTimer = false;
// Use this for initialization
void Start () {
filedImage = transform.Find ("FilledImage").GetComponent<Image> ();
}

// Update is called once per frame
void Update () {
//已经开始冷却
if (isStartTimer) {
timer += Time.deltaTime;

//计算fillAmount
filedImage.fillAmount = (coldTime - timer) / coldTime;
if (timer >= coldTime) {

//停止定时器
filedImage.fillAmount = 0;
timer = 0;
isStartTimer = false;
}
}
}

public void OnClick()
{
isStartTimer = true;
}
}