Objective c tutorial ebook

But some developers prefer Objective-C to Swift. Essential Objective-C is a free book about Objective-C programming language. Read the book. Conceptive C uses concepts to program natural language and Artificial Intelligence based computer language based on Objective C. 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. Download: epub. Price: Free! Add to Library. Create Widget. About Ryan Hodson. Learn more about Ryan Hodson. Compilation is a process whereby the human readable Objective-C code in the source file in our case hello. Prior to performing this compilation, however, the GNUstep environment must first be set up.

Thankfully, a shell script is provided to perform this task for us and may be executed as follows:. Note that this setup script will need to be executed each time you start a new Terminal window with the intention of compiling Objective-C. For this reason, you may find it advantageous to add it to the. Failure to execute this script prior to compiling Objective-C code in a Terminal window will result in the compiler reporting errors similar to the following:. From within a Terminal window change directory to the where you saved the hello.

If all goes well, the compilation should complete silently and the test application is ready to run. If, on the other hand, you see an error message similar to the following then an additional package needs to be installed on your system:.

The missing package is called gobjc and may be installed from a Terminal window using the following command:. Once the installation is complete, attempt to compile the test application again.