Copy this code to the main.c file.įinally, set the User Header Search Paths property to the folder where the SDL header files are located. This code displays rectangles with random colors on random areas of the screen. Open Greeting.hpp and add the following code between the include and #endif /* Greeting_hpp */ ViewController ( ) Feel free to drag files around to improve the arrangement in the Project Navigator. The project’s structure should now look like the following. Save the file inside the HelloCpp folder. Name the file Greeting, keep the Also create a header file box checked and click Next. In the file template window that appears, select iOS -> Source -> C++ File and click Next.
Create a new file using the File -> New -> File… menu item or press ⌘ + N. m are Objective-C source files.Ĭreate a C++ class that will be called from an Objective-C file. Look at the Project Navigator pane on the left. If this is your first time with C++, check out this tutorial on the language. Leave the other options as they are and click Next and choose a folder to save the project. What’s available is either Objective-C or Swift. Enter your organization and organization identifier in reverse domain name style.īecause it’s not really a language, there’s no option to create an Objective-C++ project. In the project options screen, name the product HelloCpp. In the template selection screen, choose Single View Application from the iOS Application tab and click Next. Open Xcode and choose Create a new Xcode project.
The final project for this tutorial can be found on GitHub. This is one of the most important reasons to still use C/C++/Objective-C for iOS apps. Another use case is the ability to leverage existing native code libraries that are already available. Despite Swift being open source, it’s not yet fully supported other platforms. Developing cross-platform apps using C or C++ is possible with some careful planning. One reason to use Objective-C is to port an existing C/C++ program written for another platform to iOS. Despite the quick rise of Swift, Objective-C is still the dominant language on iOS because of the sheer number of existing apps and libraries already created with it. It’s a strict superset of C which makes any C code a valid Objective-C program.Įven though Swift is now the recommended language for developing iOS apps, there are still good reasons to use older languages like C, C++ and Objective-C. Objective-C is close to C but with object-oriented features implemented as a thin layer on top of C. Apple provides Objective-C++ as a convenient mechanism for mixing Objective-C code with C++ code. It’s a combination of two languages, Objective-C and C++. Objective-C++ may sound like a new programming language, but it’s not.
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