| by Dhananjay Yadav | No comments

What is SWIFT?

SWIFT is an alternative to Objective C and a Protocol Oriented Programming System.SWIFT is used by Apple Inc in the development of Apple products like iOS, OS X, watchOS, tvOS and Linux etc.

When it was developed?

The 1.0 Swift was released on the 9th of September 2014.


What are the main features of SWIFT?


Swift removes entire classes of unsafe code. Integers are checked for overflow, variables are always initialized before use and memory is managed automatically.

Another feature is that Swift objects can never be nil, which means it can generate a compiler error, as soon as you write bad code. Problems can be fixed as code is written, which will reduce your time and money that you will spend on fixing errors.

It triggers a runtime crash if a NIL optional variable has been used which will help to avoid the bug, or to fix it sooner entirely in Swift code.

Fast and Powerful

Swift has greatly improved by dropping legacy C conventions. It uses the incredibly high-performance LLVM compiler to transform Swift code into optimized native code.

Swift has made Object sorting considerably quicker and faster than Python. It provides object-oriented features like protocols, generics and classes, thereby giving Cocoa and Cocoa touch developers the power and performance they demand.

Objective-C Interoperability

Swift’s complete compatibility with Objective-C allows you create a project that includes files written in either language. You can develop apps that have a mixed-language codebase.

Also, you can implement part of your app’s functionality by using the Swift’s latest features and incorporate it seamlessly back into your existing Objective-C codebase.


What are the fundamental difference between SWIFT and Objective C?


The number one advantage to choosing Swift is arguably because of its clean syntax, which makes it easier to read and write. The number of code lines needed to implement an option on Swift is a lot fewer than for Objective-C.

The reason for this is because Swift drops many legacy conventions, such as semicolons to end lines or parentheses that surround conditional expressions inside if/else statements.

Another major change is that method calls do not sit inside each other resulting in a bracket mess. Instead, method and function calls in Swift use the comma-separated list of parameters within parentheses. As a result, the code is cleaner with a simplified syntax.

Swift code more closely resembles plain English, which makes writing code more natural while enabling developers to spend far less time looking for problematic code.

This readability also makes it easier for existing programmers from JavaScript, Java, Python, C#, and C++ to adopt Swift into their toolchain.


It’s not possible for Objective-C to evolve without C evolving first. Contrarily, Swift does not have these dependencies, which makes it a lot easier to maintain.

C requires programmers to maintain two code files in order to improve the build time and efficiency of the code, which also carries over to Objective-C.

Swift, however, drops this two-file requirement, combining the Objective-C header (.h) and implementation files (.m) into a single code file (.swift). In Objective-C, you have to manually synchronize method names and comments between files.

While with Swift, programmers can spend more time creating app logic and improving the quality of their code, comments, and features that are supported.

Safer Platform

In the competitive mobile app marketplace, developing a secure app should be a priority. Swift’s syntax and language constructions exclude the several types of mistakes possible in Objective-C.

This stability means that there will be fewer crashes and cases of problematic behavior. It doesn’t prevent programmers from writing bad code, but rather makes it less likely to make mistakes. This adds an extra layer of quality control during development.

Swift takes the nil code, and generates compiler error when programmers write bad code. With Swift, you can compile, and fix the errors while writing the code, which is not possible with Objective-C. As a result, Swift works better and faster compared to Objective-C when it comes to bug testing.

All this gives reason to consider Swift as a safe and secure programming language.

Less Code & Less Legacy

With Objective-C, there are many issues that cause app crashes. Swift provides code that is less error-prone because of its inline support for manipulating text strings and data. Additionally, classes aren’t divided into two parts; the interface and the implementation. This cuts the number of files in the project in half, which makes it much easier to handle.

Swift ultimately requires less coding efforts when writing repetitive statements or causing string manipulation.

When working with Objective-C, you’ll need to combine two strings which make it lengthy. With Swift, you just need to add the ‘+’ sign to join two strings.


Swift also provides various speed advantages during development, in turn, saving on costs. A complex object sort, for example, will run 3.9x faster than an implementation of the same algorithm in Python. That’s also better than Objective-C, which is 2.8x faster than the Python version.

Its performance approaches the one of C++ which is considered the fastest algorithm calculation arithmetics. In December 2014, Primate Labs published a report on Swift and C++ performance. Apple has made it evident that they’re dedicated to improving the speed at which Swift can run app logic.

Swift Supports Dynamic Libraries

Dynamic libraries are executable chunks of code that can be linked to an app. This feature allows current Swift apps to link against newer versions of the Swift language as it evolves over time. Dynamic libraries in Swift are directly uploaded to the memory, cutting down on the initial size of the app and ultimately increasing app performance.