By Ken Maskrey
This ebook offers a major, in-depth examine Apple’s exterior accent Framework and the iPhone components API. You’ll create new, built-in suggestions that mix iPhone apps with devoted hardware.
The iPhone OS components API expands the possibilities for cutting edge iPhone builders, permitting you to regulate and computer screen exterior units, even if you’ve equipped them your self or received them from a 3rd party.
What you’ll learn
- Develop components and apps for the iPhone and iPod contact.
- Use Apple’s exterior accent Framework to create hardware/software interplay.
- Control and computer screen exterior units utilizing the iPhone add-ons API.
- Use the categorical controller periods in the iPhone OS SDK.
- Build and keep an eye on your individual accent.
- Get your add-ons authorized by means of Apple’s AE application.
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 components and builders who are looking to create add-ons for iPhone and iPod contact. This comprises embedded structures programmers who've been disregarded of the iPhone gold rush until eventually now.
The iPhone OS add-ons API expands the industry of iPhone builders over again, and this ebook is for all these builders desirous to use those new APIs to manage and display screen exterior device—whether self-built or obtained from different sources.
Table of Contents
- Accessory Overview
- EAAccessory Framework
- EA Framework layout Patterns
- The online game Controller
- Specifying a Pong Game
- Coding a Pong Game
- Adding the sport Controller
- Improving the layout
- Apple Developer Programs
- Hardware layout
- Everything Else
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Extra info for Building iPhone OS Accessories: Use the iPhone Accessories API to Control and Monitor Devices
It does so because you set the delegate to be self for both the input and output streams in the previous code snippet. When any event of interest happens in either stream, this method gets called. Note the NSStreamEventOpenCompleted, NSStreamEventErrorOccurred, and NSStreamEventEndOccurred cases; these would occur for both the input and output stream and should be handled accordingly. The event codes of most interest to us, NSStreamEventHasBytesAvailable and NSStreamEventHasSpaceAvailable refer to the input and output streams respectively.
They go from point A to point B. So, for bi-directional data flow, you need two streams: input and output. CHAPTER 2: EAAccessory Framework Streams provide a device-independent way of moving data. You need not worry about whether the device is your Pong game controller or a server on the other side of the globe. The stream simply provides the communications path. Cocoa, Apple’s name for the complete collection of frameworks, APIs and all the stuff that makes up Mac OS and iPhone OS, defines three classes of streams.
This statement loops through each element of the _accessoryList array (which is just one element) and compares its connectionID to the connectionID of the accessory with which we are working: [accessory connectionID] If any additional processing were needed to handle the disconnected accessory, that code would be placed within the brackets before the break statement. All that this code segment does is to increment your index of disconnected accessories, which would be 1. Because delegation is a central design pattern in most iPhone apps, the accessory’s delegate property defines the object to receive notifications about changes to the status of the accessory object through implementing the methods of the EAAccessory delegate protocol.
Building iPhone OS Accessories: Use the iPhone Accessories API to Control and Monitor Devices by Ken Maskrey