React-native, “Native module cannot be null”

Question

The red-box complaints react-native cannot find some symbol <unkown> in PushNotificationIOS.js line 18.

This usually happens when you fail to link the third lib to your target causing NativeModules find nothing at attempt.

To solve this, your Project Navigator -> Target -> General -> Linked Frameworks and Libraries, make sure somelib.a is there.

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In your case, please follow the ios install guides and react-native doc