如何访问方法从一个GameObject到另一个谷歌OnAdclosed on Unity？

Question

我有一个GameScreenManger，可以根据游戏状态显示或隐藏面板。我有一个AdManager gameObject，它包含一个处理广告的脚本。我可以显示广告，但在onAdclosed上，如果我尝试引用GameScreenManager，并在onAdclosed事件侦听器函数时调用函数，则调用正在触发，但操作不起作用。有人能在这方面帮我吗？

using UnityEngine;
using GoogleMobileAds.Api;
using System;

public class AdManager : MonoBehaviour
{
    public static AdManager instance;

    private string appId = "";

    private InterstitialAd InterstitialAd;
    private string InterstitialAdId = "interstitial_Ad_Id";


    private RewardedAd RewardedVideoAd;
    private string RewardedVideoAdId = "rewarded_video_ad_Id ";

    public GameObject RewardPanel;
    public GameScreenManager gameManager;

    public bool isRewardedVideo;

    private bool RewardedVideoLoaded = false;

    public void Awake()
    {
        if(instance == null)
        {                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               
            instance = this;
        } else
        {
            Destroy(this);
        }

        MobileAds.Initialize(initStatus => { });
    }

    private void Start()
    {
        RequestInterstitial();

        RewardedVideoAd = new RewardedAd(RewardedVideoAdId);

        RequestRewardedVideo();

        // Called when an ad request has successfully loaded.
        this.RewardedVideoAd.OnAdLoaded += HandleRewardedAdLoaded;

        // Called when an ad request failed to load.
        this.RewardedVideoAd.OnAdFailedToLoad += HandleRewardedAdFailedToLoad;

        // Called when an ad is shown.
        this.RewardedVideoAd.OnAdOpening += HandleRewardedAdOpening;

        // Called when an ad request failed to show.
        this.RewardedVideoAd.OnAdFailedToShow += HandleRewardedAdFailedToShow;

        // Called when the user should be rewarded for interacting with the ad.
        this.RewardedVideoAd.OnUserEarnedReward += HandleUserEarnedReward;

        // Called when the ad is closed.
        this.RewardedVideoAd.OnAdClosed += HandleRewardedAdClosed;

    }

    private void Update()
    {
        if (RewardedVideoLoaded == false)
        {
            RequestRewardedVideo();
        }
    }

    private void RequestInterstitial()
    {
        string adUnitId = InterstitialAdId;

        // Initialize an InterstitialAd.
        this.InterstitialAd = new InterstitialAd(adUnitId);

        // Create an empty ad request.
        AdRequest request = new AdRequest.Builder().Build();
        // Load the interstitial with the request.
        this.InterstitialAd.LoadAd(request);
    }

    public void ShowInterstitial()
    {
        if (this.InterstitialAd.IsLoaded())
        {
            this.InterstitialAd.Show();
        }
    }

    public void RequestRewardedVideo()
    {
        // Create an empty ad request.
        AdRequest request = new AdRequest.Builder().Build();
        // Load the interstitial with the request.
        this.RewardedVideoAd.LoadAd(request);

        if (this.RewardedVideoAd.IsLoaded())
        {
            isRewardedVideo = true;
            RewardedVideoLoaded = true;
        } else
        {
            isRewardedVideo = false;
            RewardedVideoLoaded = false;
        }
    }

    public void ShowRewardedVideo()
    {
        if (this.RewardedVideoAd.IsLoaded())
        {
            this.RewardedVideoAd.Show();
        }
    }

    public void HandleRewardedAdLoaded(object sender, EventArgs args)
    {
        MonoBehaviour.print("HandleRewardedAdLoaded event received");
    }

    public void HandleRewardedAdFailedToLoad(object sender, AdErrorEventArgs args)
    {
        MonoBehaviour.print(
            "HandleRewardedAdFailedToLoad event received with message: "
                             + args.Message);
    }

    public void HandleRewardedAdOpening(object sender, EventArgs args)
    {
        MonoBehaviour.print("HandleRewardedAdOpening event received");
    }

    public void HandleRewardedAdFailedToShow(object sender, AdErrorEventArgs args)
    {
        MonoBehaviour.print(
            "HandleRewardedAdFailedToShow event received with message: "
                             + args.Message);
    }

    public void HandleRewardedAdClosed(object sender, EventArgs args)
    {
        MonoBehaviour.print("HandleRewardedAdClosed event received");

        Debug.Log("{lo} OnClosed called sender = " + sender);

        RequestRewardedVideo();

        gameManager.CheckForLives(); //This is not working.

        this.RewardPanel.SetActive(true);

    }

    public void HandleUserEarnedReward(object sender, Reward args)
    {

        Debug.Log("{lo} Earned a Reward  HandleUserEarnedReward called!");

        string type = args.Type;
        double amount = args.Amount;
        this.RewardPanel.SetActive(true);

    }
}

GameScreen脚本

using UnityEngine;
using UnityEngine.SceneManagement;
using UnityEngine.UI;

public class GameScreenManager : MonoBehaviour
{
    public GameObject PauseScreen;
    public GameObject OutOfLifeScreen;
    public GameObject PauseButton;
    public GameObject Scoretext;
    public GameObject Livesbutton;

    public Text MusicText;

    public void LoadPause()
    {
        PauseScreen.SetActive(true);
        bool audioPlaying = FindObjectOfType<AudioManager>().audioPlaying;

        MusicText.text = audioPlaying ? "MUSIC ON" : "MUSIC OFF";
        Time.timeScale = 0f;
    }

    public void ShowResume()
    {
        PauseScreen.SetActive(false);
        Time.timeScale = 1f;
    }

    public void ShowMainMenu()
    {
        Time.timeScale = 1f;
        SceneManager.LoadScene("Menu");
    }

    public void ShowOutOfLives()
    {
        OutOfLifeScreen.SetActive(true);
        PauseButton.SetActive(false);
        Time.timeScale = 0f;

    }

    public void CloseOutOfLives()
    {

       Debug.Log(" {lo} Entered CloseOutOfLives");
       OutOfLifeScreen.SetActive(false);
       PauseButton.SetActive(true);
       Time.timeScale = 1f;
    }

    public void TogggleSound()
    {
        FindObjectOfType<AudioManager>().ToggleMute();
        bool audioPlaying = FindObjectOfType<AudioManager>().audioPlaying;

        MusicText.text = audioPlaying ? "MUSIC ON" : "MUSIC OFF";
        PlayerPrefs.SetInt("audioNeeded", audioPlaying ? 1 : 0);
    }

    public void Quit()
    {
        Application.Quit();
    }
}

Answer 1

因为回调来自非主线程，而unity是单线程环境，所以一些unity API不能从非主线程访问，例如，除了主线程之外，您不能使用GameObject.SetActive或更多组件函数，所以您需要做的是首先将回调分派到主线程，然后函数中的所有语句都将执行。

下面是如何实现的。

1)一个简单的调度程序，它在unity的主线程上执行方法。在场景中创建一个空游戏对象，并将其附加到该对象。

using System;
using System.Collections.Generic;

/// <summary>
/// Helps dispatch task results to the main thread to be able to operate on unity's API like SetActive, enabled etc...
/// </summary>
public class MainThreadDispatcher : MonoBehaviour
{
    Queue<Action> jobs = new Queue<Action>();
    static MainThreadDispatcher Instance = null;

    private void Awake()
    {
        Instance = this;
    }
    private void Update()
    {
        while (jobs.Count > 0)
        {
            var next = jobs.Dequeue();
            if(next != null)
            {
                next.Invoke();
            }
        }
    }
    /// <summary>
    /// Dispatches a function to be executed on unity's main thread to be able to use unity's API.
    /// </summary>
    /// <param name="newJob"></param>
    public static void Dispatch(Action newJob)
    {
        if (newJob == null)
            return;
        Instance.jobs.Enqueue(newJob);
    }
}

2)编辑on ad closed回调，调度到主线程。

    public void HandleRewardedAdClosed(object sender, EventArgs args)
    {
        // simply give unity control back.
        // you can pick and choose to execute what on main thread,
        // but I'm just gonna dispatch the whole block.
        MainThreadDispatcher.Dispatch(() =>
        {
            MonoBehaviour.print("HandleRewardedAdClosed event received");

            Debug.Log("{lo} OnClosed called sender = " + sender);

            RequestRewardedVideo();

            gameManager.CheckForLives();

            this.RewardPanel.SetActive(true);
        });
    }

Answer 2

在第二个脚本中似乎没有对对象的引用：

广告脚本

public GameScreenManager gsmanagerRef; //drag and drop on the editor or find it on initialization

然后，您应该能够调用

gsmanagerRef.ShowResume(); //or any other function

希望这能有所帮助！