iOS游戏集成Admob插页广告后出现发热、卡顿及崩溃问题求助

Hey there, let's tackle this AdMob-related memory/performance issue you're dealing with—it’s definitely a bummer when ads ruin your game’s smoothness and lead to crashes. Based on your code and symptoms, here are targeted fixes and best practices to resolve the root problem:

1. Fix Delegate & Ad Instance Memory Management #

Looking at your code, you’re reusing a single self.interstitial instance, but there’s a key step missing to properly clean up old ad resources:

• After an ad is dismissed, you should nil out the old interstitial instance before loading a new one to ensure it’s deallocated. Modify your adDidDismissFullScreenContent method:

  - (void)adDidDismissFullScreenContent:(nonnull id<GADFullScreenPresentingAd>)ad {
      // Release the old ad instance first
      self.interstitial = nil;
      // Load a new interstitial
      [self loadInterstitial];
  }
  

• Also, double-check that your view controller’s reference to interstitial is properly managed. Since GADInterstitialAd holds a strong reference to its fullScreenContentDelegate, make sure your view controller doesn’t create a retain cycle (modern AdMob SDKs use weak delegates by default, but it’s good to confirm).

2. Stop Unnecessary NSUserDefaults Synchronization #

Your code calls [[NSUserDefaults standardUserDefaults] synchronize] every time you update adCount—this is a costly operation that forces disk writes and can contribute to lag. NSUserDefaults automatically syncs periodically, so remove both calls to synchronize to reduce overhead:

// Remove these lines entirely—NSUserDefaults handles syncing in the background
// [[NSUserDefaults standardUserDefaults] synchronize];

3. Use Xcode Instruments to Track Leaks #

To confirm memory leaks, fire up Xcode’s Leaks and Allocations instruments:

• Attach your app to Instruments, then replicate the scenario where you show multiple ads.
• Watch for growing memory usage tied to AdMob classes (e.g., GADInterstitialAd, GADRenderingView, or video-related objects).
• Look for objects that aren’t deallocated after ads are dismissed—this will pinpoint exactly what’s leaking.

4. Optimize Ad Loading & Display Logic #

• Avoid loading ads immediately on app launch if possible. Instead, load the first interstitial right before it’s likely to be needed (e.g., after the first level completes) to spread out resource usage.
• Add a check to ensure you don’t attempt to load a new ad if one is already loading. You can track this with a boolean flag like isAdLoading:

  @property (nonatomic, assign) BOOL isAdLoading;
  
  - (void)loadInterstitial {
      if (self.isAdLoading) return;
      self.isAdLoading = YES;
      [GADInterstitialAd loadWithAdUnitID:@"ca-app-pub-xxx/xxx" request:[GADRequest request] completionHandler:^(GADInterstitialAd *ad, NSError *error) {
          self.isAdLoading = NO;
          // Rest of your completion logic...
      }];
  }
  

5. Update to the Latest AdMob SDK #

Older versions of the AdMob SDK often have memory leak bugs that get fixed in updates. If you’re using CocoaPods, update your Podfile:

pod 'Google-Mobile-Ads-SDK'

Then run pod update to get the latest fixes.

6. Mitigate Resource-Heavy Ads #

Some ads (especially long-form video ads) can hog CPU/GPU and memory, leading to overheating. Try these tweaks:

• In your AdMob dashboard, go to your ad unit settings and enable Optimize ad loading for battery (if available).
• Filter out high-resource ads by adjusting ad content settings (e.g., limit video ad length or disable auto-play video ads with sound).
• Pause non-critical game processes (like background rendering or audio) when an ad is presenting, then resume once it’s dismissed.

By implementing these steps, you should see a significant reduction in memory usage, overheating, and crashes related to AdMob ads. Let me know if you need help debugging specific leaks you find with Instruments!

内容的提问来源于stack exchange，提问作者Peter