Free Programming Books

Excellent Free Books to Learn Objective-C

Objective-C is a general-purpose, dynamic, object-oriented programming language that adds Smalltalk-style messaging to the C programming language. It’s designed to be easy to use and read, while enabling sophisticated object-oriented design.

Objective-C was the main programming language supported by Apple for macOS, iOS, and their respective application programming interfaces (APIs), Cocoa and Cocoa Touch, until the introduction of Swift in 2014.

Apple would prefer Objective-C to be considered dead and buried. But some developers prefer Objective-C to Swift. The TIOBE Index currently ranks Swift in 13th place and Objective-C in 19th place.

Here’s our recommended free books to learn Objective-C.

1. Essential Objective-C by Krzysztof Kowalczyk

Essential Objective CEssential Objective-C is a free book about Objective-C programming language.

It’s written to provide clear and concise explanation of topics for programmers both starting to learn the language as well as those diving in more complex topics.

Most examples are linked to online playground that allows you to change the code and re-run it.

The book is licensed under the Creative Commons Attribution-ShareAlike 3.0 license.

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2. Conceptive C by Harry McGeough


Conceptive-C is an AI programming language based on Objective-C and C Language. It’s a superset of both languages and is designed to work with Apple Mac OS X and iOS. The implementation is currently under development for GNU GCC.

Conceptive C uses concepts to program natural language and Artificial Intelligence based computer language based on Objective C.

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3. Ry’s Objective-C Tutorial by Ryan Hodson

Ry's Objective-C Tutorial

This book serves as both a concise quick-reference and a comprehensive introduction for newcomers to the Objective-C programming language. It walks through each language feature step-by-step, explaining complex programming concepts via hands-on examples.

This tutorial focuses solely on the programming language, rather than on iOS or Mac App development. You won’t walk away with the ability to create your own iPad apps, but you will be incredibly prepared to continue down that path.

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4. Objective-C 2.0 Essentials by Neil Smyth

Objective-C 2.0 Essentials

The Objective-C 2.0 Essentials online book contains 34 chapters of detailed information intended to provide everything necessary to gain proficiency as an Objective-C programmer for both Mac OS X and iPhone development.

The objective of this book is to teach the skills necessary to program in Objective-C using a style that is easy to follow, rich in examples and accessible to those who have never used Objective-C before. Topics covered include the fundamentals of Objective-C such as variables, looping and flow control. Also included are details of object oriented programming, working with files and memory and the Objective-C Foundation framework.

Those who have developed using other programming languages such as C, C++, C# or Java will find much about Objective-C that is familiar. That said, there are aspects of the language syntax that are unique to Objective-C. Even experienced programmers should therefore expect to spend some time transitioning to this language before embarking on a major development project.

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All books in this series:

Free Programming Books
JavaGeneral-purpose, concurrent, class-based, object-oriented, high-level language
CGeneral-purpose, procedural, portable, high-level language
PythonGeneral-purpose, structured, powerful language
C++General-purpose, portable, free-form, multi-paradigm language
C#Combines the power and flexibility of C++ with the simplicity of Visual Basic
JavaScriptInterpreted, prototype-based, scripting language
PHPPHP has been at the helm of the web for many years
HTMLHyperText Markup Language
SQLAccess and manipulate data held in a relational database management system
RubyGeneral purpose, scripting, structured, flexible, fully object-oriented language
AssemblyAs close to writing machine code without writing in pure hexadecimal
SwiftPowerful and intuitive general-purpose programming language
GroovyPowerful, optionally typed and dynamic language
GoCompiled, statically typed programming language
PascalImperative and procedural language designed in the late 1960s
PerlHigh-level, general-purpose, interpreted, scripting, dynamic language
RDe facto standard among statisticians and data analysts
COBOLCommon Business-Oriented Language
ScalaModern, object-functional, multi-paradigm, Java-based language
FortranThe first high-level language, using the first compiler
ScratchVisual programming language designed for 8-16 year-old children
LuaDesigned as an embeddable scripting language
LogoDialect of Lisp that features interactivity, modularity, extensibility
RustIdeal for systems, embedded, and other performance critical code
LispUnique features - excellent to study programming constructs
AdaALGOL-like programming language, extended from Pascal and other languages
HaskellStandardized, general-purpose, polymorphically, statically typed language
SchemeA general-purpose, functional language descended from Lisp and Algol
PrologA general purpose, declarative, logic programming language
ForthImperative stack-based programming language
ClojureDialect of the Lisp programming language
JuliaHigh-level, high-performance language for technical computing
AwkVersatile language designed for pattern scanning and processing language
CoffeeScriptTranscompiles into JavaScript inspired by Ruby, Python and Haskell
BASICBeginner’s All-purpose Symbolic Instruction Code
ErlangGeneral-purpose, concurrent, declarative, functional language
VimLPowerful scripting language of the Vim editor
OCamlThe main implementation of the Caml language
ECMAScriptBest known as the language embedded in web browsers
BashShell and command language; popular both as a shell and a scripting language
LaTeXProfessional document preparation system and document markup language
TeXMarkup and programming language - create professional quality typeset text
ArduinoInexpensive, flexible, open source microcontroller platform
TypeScriptStrict syntactical superset of JavaScript adding optional static typing
ElixirRelatively new functional language running on the Erlang virtual machine
F#Uses functional, imperative, and object-oriented programming methods
TclDynamic language based on concepts of Lisp, C, and Unix shells
FactorDynamic stack-based programming language
EiffelObject-oriented language designed by Bertrand Meyer
AgdaDependently typed functional language based on intuitionistic Type Theory
IconWide variety of features for processing and presenting symbolic data
XMLRules for defining semantic tags describing structure ad meaning
ValaObject-oriented language, syntactically similar to C#
Standard MLGeneral-purpose functional language characterized as "Lisp with types"
DGeneral-purpose systems programming language with a C-like syntax
DartClient-optimized language for fast apps on multiple platforms
MarkdownPlain text formatting syntax designed to be easy-to-read and easy-to-write
KotlinMore modern version of Java
Objective-CObject-oriented language that adds Smalltalk-style messaging to C
PureScriptSmall strongly, statically typed language compiling to JavaScript
ClojureScriptCompiler for Clojure that targets JavaScript
VHDLHardware description language used in electronic design automation
JArray programming language based primarily on APL
LabVIEWDesigned to enable domain experts to build power systems quickly
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