Better Architecture in iOS: Breaking down Massive View Controller using SOLID & MVP

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MVC; the age old architectural pattern; has been trusted by developers around the world to separate responsibilities of a software program regardless of language and platform. Anyone working in iOS applications starts with this pattern and gets comfortable with it in a really short amount of time. But an iOS developer who has been in the industry for a while would be at least getting started to familiarize with the notorious Massive View Controller paradigm by now. This problem has been here like always, and there are a lot of great articles to understand the problem and how to reduce them. I’ll list some of them which I found really helpful at the end of this blog post.

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Introduction to Strategy Pattern

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In real life software development one particular challenge we developers constantly face is requirement changes. Anyone who is in the software business game knows how frequently and drastically software specification can change in any time. For this reason, in software engineering only one thing is considered as constant: CHANGE!

In object oriented world, we have some nice ways to deal with this, i.e. design patterns to the rescue. There are lots and lots of design patterns out there to help us, the developers. Amongst them the most common and widely used one is known as Strategy Pattern. Any developer with a few years of experience under his/her belt uses this quite frequently (sometimes even without knowing they are using it!).

In this post I am going to try to create a scenario, which we can solve using strategy pattern.

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