Building iPhone OS Accessories: Use the iPhone Accessories by Ken Maskrey

By Ken Maskrey

This booklet offers a major, in-depth examine Apple’s exterior accent framework and the iPhone add-ons API. You’ll how one can create new, built-in suggestions that mix iPhone apps with devoted hardware.

The iPhone OS components API expands the possibilities for leading edge iPhone builders, permitting you to regulate and computer screen exterior units, even if you’ve outfitted them your self or received them from a 3rd party.

What you’ll learn

  • Develop add-ons and apps for the iPhone and iPod contact.
  • Use Apple’s exterior accent framework to create hardware/software interplay.
  • Control and video display exterior units utilizing the iPhone components API.
  • Use the categorical controller periods in the iPhone OS software program improvement equipment.
  • Build and keep an eye on your individual accent.
  • Get your add-ons authorized via Apple’s AE software.

Who this e-book is for

This e-book is for iPhone and iPod contact builders who are looking to write apps to manage exterior add-ons and builders who are looking to create add-ons for iPhone and iPod contact. This comprises embedded structures programmers who've been skipped over of the iPhone gold rush until eventually now.

The iPhone OS components API expands the marketplace of iPhone builders all over again, and this ebook is for all these builders eager to use those new APIs to manage and video display exterior device—whether self-built or bought from different sources.

Table of Contents

  1. Accessory review 
  2. EAAccessory Framework  
  3. EA Framework layout Patterns  
  4. The video game Controller  
  5. Specifying a Pong Game  
  6. Coding a Pong Game  
  7. Adding the sport Controller 
  8. Improving the layout 
  9. Apple Developer Programs  
  10. Hardware layout 
  11. Firmware 
  12. Everything Else 

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Extra info for Building iPhone OS Accessories: Use the iPhone Accessories API to Control and Monitor Devices (Books for Professionals by Professionals)

Sample text

Think of it as an object you get for free. You generally access a singleton using a method that begins with the prefix “shared”. For example, to access the EAAccessoryManager, you use the method sharedAccessoryManager. You use your accessory controller object, within your app, to handle all the specific processing functions needed to deal with the accessory to which you are connecting. Another way to think of it is that the EAAccessoryManager doesn’t know any details about any specific accessory, whereas, your accessory controller knows everything about the specific accessory for which it is designed.

P1, then hit enter. Congratulations, you have now created your first iPhone external accessory protocol name. 29 30 CHAPTER 2: EAAccessory Framework Choosing the name for your external accessory protocol may appear to be a totally arbitrary exercise. It is not. Because the protocol is the agreement made between the iPhone application and the external accessory firmware, the accessory also has a say in what name to use. Basically, it works like this. If you are developing both the app and accessory yourself, or your team, can name the protocol whatever you choose as long as it fits within the reverse-DNS naming convention.

The EAAccessoryManager provides the list of available accessories to which you can connect. Remember that, as of this writing, Apple permits only a single accessory per iPhone, but that it still must be dealt with as the element in the NSArray. Finally, I covered the methods and properties associated with establishing an EASession which is the logical communications path between the accessory and your iPhone application. KEY POINTS  A Framework is a hierarchical directory containing shared resources such as a library, nib files, images, strings, header files, and even documentation.

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