A Promise is an object that represents the result of an asynchronous operation. Promises make easier working with asynchronous calls, and make for cleaner, and easier to understand code. The PromiseKit project allow us to add promises to our Swift projects.
A simple guide through examples to ObjectMapper: although using a mapper library is not strictly required, doing so will allow us to map JSON into objects in a quicker, and easier manner.
In this post we will see how to create reusable components using the Interface Builder: we will design our component (drag and drop of components , layout constraints, etc) as if we were working in a Storyboard, save the result as a .XIB file, and see how we can reuse our component in different Storyboards (or even in other .XIB files).