转自： 

 https://learn.u3d.cn/tutorial/achievements-onecredit?chapterId=63562b28edca72001f21d129#

脚本AchievementSystem 

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

public class AchievementSystem : MonoBehaviour
{
    public Achievement newVideoAmountAchievement;
    public Achievement subscriberAmountAchievement;

    public Transform achievementPanel;
    public Text achievementNameText;
    public Text achievementDescriptionText;

    int videoAmount;
    int subscriberAmount;

    private void Start()
    {
        FindObjectOfType<UIManager>().UploadNewVideoAction += UploadNewVideo;
        FindObjectOfType<UIManager>().GetNewSubscriberAction += GetNewSubscriber;
    }

    void UploadNewVideo()
    {
        if (newVideoAmountAchievement.unlocked)
            return;

        videoAmount += 5;
        if (videoAmount >= 100)
            PopNewAchievement(newVideoAmountAchievement);
    }

    void GetNewSubscriber()
    {
        if (subscriberAmountAchievement.unlocked)
            return;

        subscriberAmount += 5;
        if (subscriberAmount >= 100)
            PopNewAchievement(subscriberAmountAchievement);
    }

    void PopNewAchievement(Achievement ach)
    {
        achievementNameText.text = ach.achievementName;
        achievementDescriptionText.text = ach.achievementDescription;

        ach.unlocked = true;

        StartCoroutine(PopThePanel());
    }

    IEnumerator PopThePanel()
    {
        float percent = 0;
        float amount = 165f;

        while(percent < 1)
        {
            percent += Time.deltaTime / 1f;
            achievementPanel.position += Vector3.down * amount * Time.deltaTime / 1f;

            yield return null;
        }

        yield return new WaitForSeconds(1);

        percent = 0;
        while (percent < 1)
        {
            percent += Time.deltaTime / 1f;
            achievementPanel.position += Vector3.up * amount * Time.deltaTime / 1f;

            yield return null;
        }
    }
}

[System.Serializable]
public class Achievement
{
    public string achievementName;
    public string achievementDescription;
    public bool unlocked;
}

 脚本UIManager

using System;
using UnityEngine;
using UnityEngine.UI;

public class UIManager : MonoBehaviour
{
    public Text newVideoText;
    public Text subscriberText;

    public int newVideoAmount;
    public int subscriberAmount;

    public event Action UploadNewVideoAction;
    public event Action GetNewSubscriberAction;

    public void UploadNewVideo()
    {
        newVideoAmount += 5;
        newVideoText.text = "VIDEO: " + newVideoAmount;

        if (UploadNewVideoAction != null)
            UploadNewVideoAction();
    }

    public void GetSubscriber()
    {
        subscriberAmount += 5;
        subscriberText.text = "SUBSCRIBER: " + subscriberAmount;

        if (GetNewSubscriberAction != null)
            GetNewSubscriberAction();
    }
}