Automated testing of a user interface on most systems is frequently slow and fragile, and iOS is no exception. In practice this means as developers we're frequently less strenuous with the automation of the user interface and its connection to the rest of a system, relying instead on a few automated tests and more manual exploratory testing than we might like. What if we could test a user interface as quickly and reliably as we do with unit tests of our business logic?

Get a tutorial on converting a trained AlexNet Caffe model into a CoreML format that can be used in Apple's devices.

Creating a good networking layer is often a pain. Sometimes they end up over-abstracted and you have to write hundreds of little unit tests to prove that they work. Other times they're too rigid, and as soon as you have to communicate with something that broke your expectations, you find yourselves in a nasty refactor. This approach using Apple's new Combine framework attempts to strike a nice balance with highly testable (and tested) code. As well as remaining relatively low on overhead and boilerplate.

There's still lots to explore about Combine (Apple's reactive framework). It certainly has a ton of potential and you can get very far by using just what Apple provides. In this article, we'll explore creating our own custom operator, complete with tests!

Creating network stubs can sometimes be challenging. This is especially true when you have the same endpoint that needs to return different responses at different times. This fluent wrapper makes this process a lot easier and can help you with much simpler stubbing in the future.

Learn how to set up Bitrise for your iOS projects.

Learn how to make synchronous network calls with Apple's Combine framework.

Understand how GeometryReader can be used to create relative layouts.