原文链接 It has been a long time since my last post. I wanted to prepare an article which will cover the theory which stands behind Observable and show the usage on real, not dummy example. It has turned out it was not trivial task as I thought 😉 The article is split into 2 parts. At the beginning, I try to explain what is the Observable and how should you treat them. The second part is a tutorial how to implement a search of Spotify tracks using RxSwift . A theory is a theory, but an example is a thing which makes a subject easier to understand. To cut a long story short, I hope you will enjoy reading 🙂 Observable – a sequence The thing which holds people down before jumping into next level while using Rx is the thinking in an imperative way . You have to break old habits and start to think in the Rx way. I recommend you to think about Observable like about an array . This is because, you can map , filter , reduce ...