UGUI实现技能cd效果

、using UnityEngine;

using System.Collections;

//导入这个类  （自动导入插件）

using UnityEngine.UI;

public class SkillItem : MonoBehaviour {

// Use this for initialization
//冷却cd时间
public float cdTime = 2;
private bool isStartTimer;
private float time;
private Image filledImage;
public KeyCode myKey;
void Start () {
filledImage = transform.Find ("mask").GetComponent<Image> ();
}

// Update is called once per frame
void Update () {
if (Input.GetKeyDown (myKey))
{
isStartTimer = true;
}
if (isStartTimer)
{
time += Time.deltaTime;
filledImage.fillAmount
= (cdTime - time) / time;
if (time >= cdTime)
{
filledImage.fillAmount = 0;
time = 0;
isStartTimer = false;
}
}
}

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

 mask这里设置为Filled