Unity场景重载后激励广告无法加载、按钮失效问题求助

核心问题分析 #

场景重载时，Unity Ads SDK重复初始化、事件监听未正确解绑/重绑、广告状态未同步，导致按钮失效、脚本无法正常工作。

具体解决步骤 #

• 使用单例模式确保SDK只初始化一次
  Unity Ads不支持重复初始化，场景切换时若初始化脚本被重复创建会引发异常。将广告管理脚本设为全局单例，保留在所有场景中：

  public class AdsManager : MonoBehaviour
  {
      public static AdsManager Instance;
      private bool _isSdkInitialized;
      [SerializeField] private string _gameId;
  
      void Awake()
      {
          if (Instance != null && Instance != this)
          {
              Destroy(gameObject);
              return;
          }
          Instance = this;
          DontDestroyOnLoad(gameObject);
      }
  
      void Start()
      {
          if (!_isSdkInitialized)
          {
              Advertisement.Initialize(_gameId);
              _isSdkInitialized = true;
              // 注册广告加载状态监听
              Advertisement.RewardedAdLoaded += OnRewardedAdLoaded;
              Advertisement.RewardedAdFailedToLoad += OnRewardedAdLoadFailed;
          }
      }
  
      void OnDestroy()
      {
          // 销毁时移除监听，避免内存泄漏
          Advertisement.RewardedAdLoaded -= OnRewardedAdLoaded;
          Advertisement.RewardedAdFailedToLoad -= OnRewardedAdLoadFailed;
      }
  
      private void OnRewardedAdLoaded()
      {
          // 全局通知广告就绪，更新按钮状态
          var adButton = GameObject.FindObjectOfType<Button>();
          if (adButton != null) adButton.interactable = true;
      }
  
      private void OnRewardedAdLoadFailed(LoadError error, string message)
      {
          // 处理加载失败逻辑
          Debug.Log($"广告加载失败: {error} - {message}");
      }
  
      public void ShowRewardedAd()
      {
          if (Advertisement.IsReady("rewardedVideo"))
          {
              var options = new ShowOptions { resultCallback = HandleShowResult };
              Advertisement.Show("rewardedVideo", options);
          }
      }
  
      private void HandleShowResult(ShowResult result)
      {
          switch (result)
          {
              case ShowResult.Finished:
                  // 给用户发放奖励
                  break;
              case ShowResult.Skipped:
                  // 用户跳过广告
                  break;
              case ShowResult.Failed:
                  Debug.Log("广告播放失败");
                  break;
          }
          // 播放后重置按钮状态，等待下一次加载
          var adButton = GameObject.FindObjectOfType<Button>();
          if (adButton != null) adButton.interactable = false;
      }
  }
  

• 场景重载后重绑按钮事件与状态
  场景切换后，UI元素会重建，需在场景加载完成后重新绑定点击事件并同步广告状态：

  public class AdButtonHandler : MonoBehaviour
  {
      private Button _adButton;
  
      void OnEnable()
      {
          SceneManager.sceneLoaded += OnSceneLoaded;
      }
  
      void OnDisable()
      {
          SceneManager.sceneLoaded -= OnSceneLoaded;
      }
  
      void Start()
      {
          _adButton = GetComponent<Button>();
          _adButton.onClick.AddListener(() => AdsManager.Instance.ShowRewardedAd());
          // 初始状态设为不可点击，直到广告加载完成
          _adButton.interactable = Advertisement.IsReady("rewardedVideo");
      }
  
      void OnSceneLoaded(Scene scene, LoadSceneMode mode)
      {
          // 重新获取按钮组件并绑定事件
          _adButton = GetComponent<Button>();
          _adButton.onClick.RemoveAllListeners();
          _adButton.onClick.AddListener(() => AdsManager.Instance.ShowRewardedAd());
          // 同步当前广告就绪状态
          _adButton.interactable = Advertisement.IsReady("rewardedVideo");
      }
  }
  

• 避免重复注册事件监听
  所有广告相关的事件监听必须在OnDisable或OnDestroy中移除，防止场景重载后重复注册导致逻辑冲突或内存泄漏。

内容的提问来源于stack exchange，提问作者Daniel