iPhone Programming

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iPhone Programming

• Speaker Arun Chhetri

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What is iPhone

• Smart Phone by Apple.
• Why is iPhone an iPhone, not just Phone ??????
• Built in Accelerometer
• GPS or Position Triangulation
• Multi Touch Interface
• Sensors
• Keyboard
• Safari
• Mail
• Calendar
• Wide Screen Display
• I think biggest in the market

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What do u need to Program for iPhone

• To buy MAC

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iPhone Overview

• Smart Phone
• iPod (Widescreen)
• Wireless Internet Communication Device
• Wifi 802.11 b/g
• PDA
• Computer (OS X)
• Camera
• Multi-Touch interface
• GPS
• App Store

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iPhone Development

• Development done with the help of iPhone SDK
• Uses Objective-C
• IDE XCODE
• Only push your application through App Store
• 99 membership
• Review of your application
• Code also
• 70 and 30 share.

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iPhone SDK

• iPhone Sdk have five powerful tools to do iPhone
  programming.
• XCODE
• Professional text editor
• Debugger
• GCC compiler
• Interface Builder
• For creating user interface
• Instruments
• For optimizing application
• Dash Code
• For creating web applications for Safari
• iPhone Simulator

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Things to consider before programming

• Low resources
• 128 mb Ram
• Limited Battery life
• Application should take less execution time.
• Exceptional Handling
• Multi Touch Events

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iPhone OS overview and Technologies

• iPhone Os can be viewed as set of layers

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Cocoa Touch Layer

• The Cocoa Touch layer comprises the UIKit and
  Foundation frameworks (UIKit.framework and
  Foundation.framework), which provide the basic
  tools and infrastructure you need to implement
  graphical, event-driven applications in iPhone OS
• iPhone OS uses this layer to implement features
• Application management
• Graphics and windowing support
• Event-handling support
• User interface management
• Objects representing the standard system views
  and controls
• Support for text and web content
• Accelerometer data
• The built-in camera
• The users photo library
• Device-specific information

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Media Layer

• The Media layer provides graphics and media
  technologies in iPhone OS that are geared toward
  creating most advanced multimedia experience on a
  mobile device
• Graphics Technologies
• technologies to do your 2D and 3D drawing
• OpenGLES.framework (OpenGL), EAGL.framework,
  QuartzCore.framework (Core Animation), Core-
  Graphics.framework (Quartz)
• Core Audio
• Native support for audio is provided by the Core
  Audio family of frameworks
• CoreAudio.framework (audio type and file info),
  AudioToolbox.framework (playback and recording),
  AudioUnit.framework (audio processing)
• OpenAL
• The Open Audio Library (OpenAL) interface is a
  cross-platform standard for delivering 3D audio
  in applications
• Video Technologies
• iPhone OS provides support for full-screen video
  playback through the Media Player framework
  (MediaPlayer.framework)
• supports the playback of movie files with the
  .mov, .mp4, .m4v, and .3gp filename extensions

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Core Services

• The Core Services layer provides the fundamental
  system services that all applications use
• Address Book
• AddressBook.framework provides programmatic
  access to the contacts stored on a users device
• AddressBookUI.framework complements the Address
  Book framework by providing a graphical interface
  for accessing the users contacts
• Core Location
• CoreLocation.framework lets you determine the
  current latitude and longitude of a device
• CFNetwork
• CFNetwork.framework high-performance, C-based
  framework that provides a set of object-oriented
  abstractions for working with network protocols,
  for tasks such as communicating with FTP and HTTP
  servers or resolving DNS hosts
• Security
• Security.framework provides interfaces for
  managing certificates, public and private keys,
  and trust policies
• SQLite
• The SQLite library lets you embed a lightweight
  SQL database into your application without
  running a separate remote database server process
• From your application, you can create local
  database files and manage the tables and records
  in those files

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Core OS

• The Core OS layer encompasses the kernel
  environment, drivers, and basic interfaces of the
  operating system
• iPhone OS provides a set of interfaces for
  accessing many low-level features of the
  operating system. Your application accesses these
  features through the LibSystem library. The
  interfaces are C-based and provide support for
  the following
• Threading (POSIX threads)
• Networking (BSD sockets)
• File-system access
• Standard I/O
• Bonjour and DNS services
• Locale information
• Memory allocation

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iPhone Hardware and Software features that can be
incorporated in applications

• Accelerometer
• iPhone and iPod touch have 3 accelerometers to
  measure changes along each of the primary axes in
  three-dimensional space, which allows you to
  detect motion in any direction
• The system uses the accelerometers to monitor a
  devices current orientation and to notify
  applications when that orientation changes
• Applications that want to access the
  accelerometer data directly can also do so using
  UIKit

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iPhone Hardware and Software features that can be
incorporated in applications

• Core Location
• The Core Location framework monitors signals
  coming from cell phone towers and Wi-Fi hotspots
  and uses them to triangulate the users current
  position
• You can specify the desired accuracy of the
  location information, and threshold for reporting
  changes in the current location
• Use this framework judiciously to not drain the
  users battery

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iPhone Hardware and Software features that can be
incorporated in applications

• Contacts
• The Phone, Mail, and SMS Text applications use
  users list of contacts to identify people the
  user needs to contact and to facilitate basic
  interactions such as starting a phone call,
  email, or text message
• Your own applications can access this list of
  contacts for similar purposes or to get other
  information relevant to your applications needs
• You can access the users contact information
  using the Address Book UI framework

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iPhone Hardware and Software features that can be
incorporated in applications

• The Camera and Photo Library
• iPhone has an inbuilt camera as well as a
  centralized photo library whereas iPod Touch
  doesnt have a camera
• iPhone OS provides access to both of these
  features through classes in the UIKit framework
• You can incorporate system-provided picker
  interfaces into your application
• These interfaces provide standard system views
  for selecting a photo from the users photo
  library or taking a picture using the camera

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Styles of Programming for iPhone

• iPhone OS defines three basic styles for
  applications
• Productivity style
• Utility style
• Immersive style

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Productive Style

• Productivity Applications
• The focus is on the organization and manipulation
  of detailed information
• Information is usually text-based, but may also
  be image based if the content is more visually
  oriented
• Tend to be use multiple screens and make use of
  system controls to handle the navigation from
  screen to screen
• Typically rely on system views and controls (text
  fields, labels, and other data-oriented views)
  for their presentation and do little or no custom
  drawing
• Example The Settings application

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Utility Style

• Utility Applications
• Perform a targeted task that requires relatively
  little user input
• A quick summary of information or a simple task
  on a small number of objects
• Interface should be a visually appealing and
  uncluttered to make it easier to spot the needed
  information quickly
• Use of appropriate graphics to have a pleasing
  visual appearance
• Examples Weather and Stocks applications

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Immersive Application

• Immersive Applications
• Offer a full-screen, visually rich environment
  thats focused on the content and the users
  experience with that content
• Commonly used for implementing games and
  multimedia-centric applications
• Often present custom interfaces, and relies less
  on standard system views and controls
• Typically use OpenGL ES to draw content, because
  it provides good performance for full-screen
  content at high frame rates
• Example Media Player application

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Our Project

• iRobotController
• Control Remote Devices through iPhone.
• Remote Device has a CAM which relays live stream
  to iPhone

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iRobotController

• On Remote Device Side
• Install linux on the remote device.
• Write Device Controller.
• Written in Python.
• Make an ad-hoc network on that device that has to
  be controlled.
• Write a demon on remote device that listen to
  particular port for e.g. 7080.
• Receives XML, parse it and get the command, then
  execute the command.
• Capture live video through cam and then relay it
  to iPhone.

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iRobotController

• On iPhone Side
• Connect iPhone to the ad-hoc network.
• Get the Accelerometer and touch interface
  readings.
• Create XML, and send to that particular remote
  device.
• Receives live stream and then display it on
  screen.

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Thanks