If the app on runs in letterbox mode on iPhone X, the SDK will run in letterbox mode too. This is what the SDK screen looks like in this mode -
To ensure that the SDK uses the full dimensions of the screen, you will need to add a Launch screen storyboard in the app. The launch screen can be empty. The only criterion is that it should be present in your app. To add the launch screen, perform the following steps in Xcode -
For more details on the issue, please refer here
To use the bitcode library, make sure all the thirdparty cocos2dx libraries are built with bitcode enabled.