![](https://www.ottorinobruni.com/wp-content/uploads/2023/12/GoogleAdMob-e1702371272558.jpg)
How to solve GAD InvalidInitialization Exception crash using Google AdMob and Xcode
Every now and then I get to update some old app or implement previously used features for iPhone apps. Always I am amazed at the possible problems that can happen to and I want to talk to you about the Google Mobile Ads SDK integration
using Swift.
In my last attempt I came across this exception, whenever I start the iOS app in debug or release mode. The name should give help but instead you have to work with it. GADApplicationVerifyPublisherInitializedCorrectly…
![](https://www.ottorinobruni.com/wp-content/uploads/2023/12/GADInvalidInitializationException-300x218.jpg)
How to integrate Google Mobile Ads SDK into your Swift project?
In short these are the steps you should take to integrate Google Mobile Ads SDK into your Swift project:
- Install the package with CocoaPods or Swift Package Manager, I used the last one.
- Add in your Info.plist the GADApplicationIdentifier string key.
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<key>GADApplicationIdentifier</key> <string>YOUR KEY</string>
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- Add in your Info.plist the SKAdNetworkItems array key with SKAdNetworkIdentifier values for Google.
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<key>SKAdNetworkItems</key> <array> <dict> <key>SKAdNetworkIdentifier</key> <string>cstr6suwn9.skadnetwork</string> </dict> ... </array>
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- Add in your Info.plist the GADIsAdManagerApp bool key.
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<key>GADIsAdManagerApp</key><true/>
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- Initialize the Mobile Ads SDK in the AppDelegate.m file.
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import GoogleMobileAds @UIApplicationMain class AppDelegate: UIResponder, UIApplicationDelegate { func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool { GADMobileAds.sharedInstance().start(completionHandler: nil) return true } }
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You can find more information here. I followed all the steps in the tutorial but my app kept crashing when I started the app.
How did I solve the problem?
It was enough to complete this last step. After adding GADApplicationIdentifier & SKAdNetworkItems values in Info.plist, you have to also add -ObjC Linker Flags.
![](https://www.ottorinobruni.com/wp-content/uploads/2023/12/GoogleAdMob_objc_linker_flag-1024x272.jpg)
Open project’s build settings and search for linker. Add the -ObjC linker flag to Other Linker Flags in your project’s build settings for Debug and Release Mode.
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Thanks for reading!