Updated (2011/01/16) – Please note that this article covers SIO2 v1.4, which was the original free/low-cost version of SIO2. This article does not cover SIO2 v2.x.
SIO2 is an interesting and useful library for building 3D OpenGL ES applications under Apple’s iOS. While not strictly object-oriented like Apple’s Cocoa, much of the OpenGL functionality is abstracted into a collection of useful structures and related higher-level functions.
For historic and performance reasons, SIO2 is written in C++, not Objective-C. Bridging between pure C++ and Objective-C is not always as straightforward as it should be, and there are a few things to take into consideration when combining C++ libraries with Objective-C.
To aid with that issue, SIO2 comes with a customized Xcode template project, which provides a stable base for beginning the development of an iOS application that combines the SIO2 library with Objective-C and Cocoa. However, it’s not always practical or even recommended to begin all Xcode projects from the SIO2 template, and if you already have an existing Xcode project, it can be a challenge importing the SIO2 library into it. This article outlines the steps needed to import SIO2 into your existing Xcode Objective-C project. Continue reading Adding SIO2 to an Existing Xcode iOS Project
