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A Complete Guide And Comparison Of MVC and MVVM

nilay_rounded_152885823c.pngNilay D

Do you know what a mission-creep is for mobile app developers? Using the right data model! Just as architects consider blueprints to construct a building, developers use data modelling to map all the mobile app attributes into a data structure.

It also helps build the software faster by catching errors early - which is far better than fixing errors once the software code has been written.

A data model documents necessary jargon and concepts and provides a foundation for long-term maintenance. The best part is it consumes less than 10% of a project budget by simplifying the software complexity and fetching insight into the project risk.

Without proper data mode, 70% of the software development efforts tank on average.

Principle of good, event-driven architecture

Whether it is about Android application development or iOS app development, mobile app developers risk writing codes in an unstructured manner without a blueprint.

That might increase the number of code lines, thus making it difficult to understand. Therefore, a seamless data flow must use event-driven architecture in Android application development, which boosts scalability, bug resistance, and robustness.

Typically, architectural patterns play a crucial role in IOS app development as they simplify the complicated codes, making the UI code manageable and cleaner.

The thing is, no matter how crisp the software code is, the consumers will never interact with it; instead, they will interact with what the codes will accomplish.

List-of-architectural-principles

For instance, they are more interested in basing their mobile app experience on the number of clicks it took them to navigate, sign-up, or read something on it. It's all about the ease-of-use.

That's where Model-View-Controller (MVC) and Model–View–ViewModel (MVVM) enter the picture as they are the two most popular architectural patterns that developers follow for making mobile apps.

They offer proven solutions to consumer problems, save building and testing time of developers, and accelerate the entire iOS app development process. It would just take the consumer a minute to understand what needs to be done on the app with common UI design patterns.

This article will study the terms in detail and compare them to understand which one's better. Therefore, without further ado, let's dive in:

Model-View-Controller (MVC)

MVC architecture was first introduced in 1987 in the Smalltalk programming language, but it wasn't until 1988 until it was accepted as a general topic. It was traditionally used for desktop graphical user interfaces (GUIs), but its usage has moved to web apps in recent times.

The framework is an architectural pattern that categorizes the mobile application into three main components - Model, View, and Controller - developed for specific test-driven development app aspects.

MVC pattern

The Controller sits at the same level as the View, listens to the events from both Model and View, and regulates actions between them. In a nutshell, the Controller is responsible for addressing all the events of the app.

MVC-architecture

As you can see in the image shared below, it fetches input from the users (View) and then transmits it to the Model, after which it shares the result to the View.

Components

Model

The component includes all the data and related business logic. Basically, it represents the data transferred between the Controller and the View. For instance, if the Controller helps retrieve customer information from the database, it manipulates the data and either uses it to render the same data or sends it back to the database.

View

The View defines the display (UI) of the app. It presents data to the consumer in the form of diagrams, tables, and charts. View handles consumer interaction with the mobile app. The data gathered by Model create Views. A consumer's View includes UI components such as dropdowns, text boxes, bread crumbs, and more.

Controller

This is the interface between Model and View and contains control logic by interpreting keyboard and mouse inputs from the user. That way, it informs the Model and Views to change as appropriate. For example, a Controller commands Model to update an action - for example, saving a specific document or adding a product to the cart.

The Controller also commands View to change the associated presentation - for example, scrolling a particular document or showing the added product to the cart

With better clarity on the patterns, let's analyze the features, pros, and cons of MVC in-depth:

Features

  1. MVC is straightforward and ensures test-driven development. The framework is highly testable, pluggable, and extensive.

  2. The framework offers separation of logic - Model, View, and Controller - and keeps application tasks separate, such as UI, business logic, and input.

  3. It allows routing for SEO-friendly URLs, i.e., maps comprehensible and searchable URLs.

  4. The developers have complete control over the HTML and URLs in the application.

Pros

  1. All classes and objects in MVC function independently, which makes it easier to test them.

  2. Developing various components can happen simultaneously, which makes it easier to support new types of clients.

  3. In this framework, business logic and presentation layers are kept separate from each other. That's why it isn't complicated.

  4. It offers excellent support for test-driven development.

  5. It enables a logical grouping of related actions on the Controller and provides a clean separation of concerns (SoC).

  6. It uses only a front controller pattern, processing web application requests by using a single controller.

  7. It works phenomenally well for web applications that support large groups of developers and designers.

Cons

  1. There's no formal validation support, which is why knowledge of multiple technologies is very much needed.

  2. The UI and business logic are mixed, which makes managing data get increasingly inefficient or complicated.

  3. It is challenging to use MVC with the modern user interface.

  4. It's hard to reuse and implement tests because of the independence of components.

  5. Because multiple programmers can conduct parallel programming, it can get messy.

Pros-And-Cons-Of-MVC

Popular MVC frameworks

Since MVC has been in the picture of iOS app development for a very long time, it is often interesting to know the frameworks which are based on MVC. That also works for Android application development.

Since MVC has been in the picture of iOS app development for a very long time, it is often interesting to know the frameworks which are based on MVC. That also works for Android application development.

Some of the biggest names include CherryPy, Yii, CakePHP, Laravel, Symphony, Django, Ruby, Zend Framework, Fuel PHP, CodeIgniter, Catalyst, and Spring MVC. Facebook currently deploys the MVC framework.

Model–View–ViewModel (MVVM)

Imagine a scenario where web designers have the flexibility to take on design and test-driven development tasks simultaneously. Or when they can change the UI without having to consider other logic in the codebase. Well, it turns out, the MVVM framework can make that a reality.

Invested by Microsoft architects Ted Peters and Ken Cooper, MVVM typically simplifies user interfaces' event-driven architecture. Unlike MVC, this framework didn't come into existence before 2005.

The framework comprises a software architectural pattern that facilitates graphic UI development from the back-end and business logics' test-driven development. That way, the View is not dependent on any specific model platform.

MVVM pattern

It offers two-way data binding and command transmissions between View and View-Model. It creates View-specific subsets of the Model comprising logic information and state and removes the need to display the complete Model to View. The View-Model updates the Model, and the Model sends notifications to View-Model, which, in turn, notifies the View.

MVVM-Architecture

Let's understand the components in detail:

Components

Model

The Model stores data and logic, which means it encapsulates the data and behaviour and the application domain's action. It merely holds the data. For instance, if the View-Model helps retrieve customer information from the database, it manipulates the data and either uses it to render the same data or sends it back to the database.

View-Model

As the name suggests, it is the link between Model and View. It is responsible for presenting functions, methods, and commands that support the state of the View. That means it retrieves data from the Model and shows it to the View.

View

Like MVC, View defines the display (UI) of the app and stands for JQuery, CSS, and HTML components. It presents data to the consumer in the form of diagrams, tables, and charts. View handles consumer interaction with the mobile app.

For instance, if the consumer adds a product to the shopping cart, the View enables them to see the cart's added product. In a nutshell, Views are created by the data gathered by Model.

A consumer's View includes UI components such as drop-downs, text boxes, bread crumbs, and more. The View transforms the Model to UI.

Now that there is an understanding of how the framework functions, it will be interesting to check out MVVM's features, pros, and cons. Please have a look:

Features

  1. The framework is written for desktop application and comprises data binding capabilities such as the INotifyPropertyChanged interface and XAML. It enables test-driven development.

  2. The developers can quickly implement new features in the web app and accomplish improved systems performance because of the ability to cache elements.

  3. The framework separates business logic from the user interface.

  4. Since there is greater understanding and more control over HTML, it allows for more personalization.

  5. The developers can benefit from the MVVM pattern used by nRoute, SilverLight, and WPF.

Pros

  1. The screens load faster because MVVM enables improved system performance

  2. It is effortless to test, and the framework comprises reusable components.

  3. One of the most important things to note is MVVM loosely couples the event-driven architecture. The developers can write unit test cases for both Model and ViewModel layers without referencing the View.

  4. It streamlines the data sending process by transmitting only the necessary data to the consumer.

  5. The framework saves time and money on updating user interfaces. It separates the UI from application logic, making it easier for developers to upgrade the same with minimal effort.

Cons

  1. The framework could be an overkill for simple UI operations, and for larger UI apps, generalizing the ViewModel can be challenging.

  2. It doesn't offer any tight coupling between ViewModel and Model. Data binding between the two instigates ample memory consumption in extensive apps.

  3. As mentioned before, the framework is relatively new. The MVVM event-driven architecture is based on browser-side technologies, which means it hasn't matured yet and is dependent on how the browsers perform.

  4. To benefit from MVVM, consumers must only use a JavaScript-enabled browser. The code is responsible for resizing screens across devices.

Pros-And-Cons-Of-MVVM

Popular MVVM frameworks

Although a newbie in the app development market, some powerful MVVM frameworks include MVVM Light, Caliburn Micro, and Prism. Google currently deploys the MVVM framework.

Differences between MVC and MVVM

While both frameworks have their advantages and disadvantages, it is also essential for developers to understand the differences between the two. We have prepared a bird's eye view:

 Comparison-between-MVC-vs-MVVM

Summing it up

In the last two decades, the variations of websites and iOS app development and Android application development have evolved dramatically. That is so because of the exponential growth of programming languages and the transformation of our computing power.

That has inevitably given birth to many new codebases and event-driven architectures to create a website or mobile app. While there's no right or wrong way the software codes can be structured, it is crucial to understand which framework would work better.

MVC and MVVM are both winners. So, if you don’t know which one to choose and need a helping hand, please contact our expert team at Intuz for custom mobile and web development solutions today!

Nilay D

Nilay D

Being in the industry of software development for more than 18 years, Nilay D is expert in Advising the right product suite to the clients. He has consulted numerous start-ups, SMBs and many fortune 500 companies for IT solution development.

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