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;

	}

}