Unity 通过修改图片透明度实现淡出效果_unity改变image透明度

Sprite类型

绑定即可使用

物体被激活后立即执行

using System;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
 
public class transparency : MonoBehaviour
{
    //等待时间
    public float waittime=0;
    //渐变时长
    public float time=0.5f;
    //定时器
    public float timer;
    //透明度 范围是0-1
    float alpha = 0.9f;
 
    // Start is called before the first frame update
    void Start()
    {
        
    }
 
    // Update is called once per frame
    void Update()
    {
        timer += Time.deltaTime;
        if(timer>waittime)
        {
            alpha = (time - (timer-waittime)) / time;
            gameObject.GetComponent<SpriteRenderer>().color = new Color(gameObject.GetComponent<SpriteRenderer>().color.r, gameObject.GetComponent<SpriteRenderer>().color.g, gameObject.GetComponent<SpriteRenderer>().color.b, alpha);
        }
    }
}

被外界通知后即可生效

using System;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
 
public class transparency : MonoBehaviour
{
    //等待时间
    public float waittime = 0;
    //渐变时长
    public float time = 0.5f;
    //定时器
    public float timer;
    //透明度 范围是0-1
    float alpha = 0.9f;
    //启用状态
    public bool workingstatus = false;
 
    // Start is called before the first frame update
    void Start()
    {
 
    }
 
    // Update is called once per frame
    void Update()
    {
        if(workingstatus == true)
        {
            timer += Time.deltaTime;
            if (timer > waittime)
            {
                alpha = (time - (timer - waittime)) / time;
                gameObject.GetComponent<SpriteRenderer>().color = new Color(gameObject.GetComponent<SpriteRenderer>().color.r, gameObject.GetComponent<SpriteRenderer>().color.g, gameObject.GetComponent<SpriteRenderer>().color.b, alpha);
            }
        }
        if (timer > waittime + time)
        {
            workingstatus = false;
        }
    }
}

在其他脚本调用以下代码

guidetip.GetComponent<transparency>().workingstatus = true;

Image类型

绑定即可使用

被外界通知后即可生效

using System;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
 
public class transparency : MonoBehaviour
{
    //等待时间
    public float waittime = 0;
    //渐变时长
    public float time = 0.5f;
    //定时器
    public float timer;
    //透明度 范围是0-1
    float alpha = 0.9f;
    //启用状态
    public bool workingstatus = false;
 
    // Start is called before the first frame update
    void Start()
    {
 
    }
 
    // Update is called once per frame
    void Update()
    {
        if(workingstatus==true)
        {
            timer += Time.deltaTime;
            if (timer > waittime)
            {
                alpha = (time - (timer - waittime)) / time;
                gameObject.GetComponent<Image>().color = new Color(gameObject.GetComponent<Image>().color.r, gameObject.GetComponent<Image>().color.g, gameObject.GetComponent<Image>().color.b, alpha);
            }
            if(timer>waittime+time)
            {
                workingstatus = false;
            }
        }
    }
}

在其他脚本调用以下代码

guidemask.GetComponent<transparency>().workingstatus = true;

手动调节图片透明度