Avocado works on a three-step build process. First, your web code is built if necessary. Next, the built web code is copied to each platform, and finally the app is compiled using the platform-specific tooling.
iOS relies on Xcode to do the final app compile
avocado build
avocado copy ios
avocado open ios
Once XCode launches, you can build your finally app binary through the standard XCode workflow.
avocado build
avocado copy android
avocado compile android
avocado build