(Previous: Crash Course #2 - Building Your First iPhone Application: Hello World!)

What better way to demonstrate the iPhone’s advanced user interface and state of the art hardware than to roll your own mobile fart application. In this crash course I will expect you understand some of the concepts from Crash Course #1 & #2, but this application is really not much more complex than Hello World from Crash Course #2.

1. Start a new View Based project in Xcode called “iFart”

2. Click on Project -> Add to Project

3. Navigate to /Developer/Platforms/iPhoneSimulator.platform/Developer/ SDKs/iPhoneSimulator2.x.sdk/System/Library/Frameworks then add AudtioToolbox.framework.

4. Do not tick the box to copy to project, and select “Relative to Current SDK” in the drop down menu

5. Open “iFartViewController.h” and paste in the following code

You will notice the code doesn’t have any OUTLETs.. it doesn’t need any as it is not going to update anything on the iPhone screen, it only needs to play a sound so there is only a single ACTION.

6. Open “iFartViewController.m” and add this code after the @implementaion iFartViewController

All this code does is play “fart.wav”.

7. Now we need to actually add fart.wav to our project. Find a suitable bit of wav audio less than five seconds and call it fart.wav and drag it to the resources folder of your project. When it prompts you set the drop down to “default” again and tick the box to copy the file to the project.

8. Now double click on “iFartViewController.xib” and go into the Interface Editor. It’s time to add our fart button.

9. Drag a “Round Rect Button” from the Library into your view. Use the handles on the button to resize it to the full size of your window if you like, so the whole screen is one giant farty button. Change the button text to whatever you like.

10. Now we are going to connect the Button to our ACTION. Click on the button then go to the blue arrow toolbar button in the “Button Connections” window and click-drag from the “Touch Inside Up” circle to the FILES OWNER CUBE (pictured).

11. Select our “buttonPressed” method from the list

12. We are done! Save your interface and Build and Go

The Finished Application

NOTE – For some reason the iPhone Simulator may or may not produce sound. I’ve found this code works fine when you run it on the actual iPhone, although it costs you $99 in developer fees for the privilege of signing your code to test on an actual iPhone.

Ok so it’s not exactly the greatest example of Apple’s clean code and Model View Controller methodology, but it’s a simple example that again illustrates an IBAction method call from a button, and in this tutorial we’ve used some new calls from the Audio Toolkit framework to play our wav.

I’ve included the source code bundle for you here.

Have Fun!