iPhone SDK overview for app development

The iPhone and the SDK

Mike Qaissaunee
mqaissaunee@brookdalecc.edu
http://q-ontech.blogspot.com
www.twitter.com/mqaissaunee
www.slideshare.net/mqaissaunee

What is the iPhone?
• Apple’s Smartphone

What is the iPhone?
• More than a Phone?

What is the iPhone?
• Built in Accelerometer

What is the iPhone?
• GPS or Position Triangulation

What is the iPhone?
• Multi Touch Interface

What is the iPhone?
• Sensors

What is the iPhone?
• Sensors
• Keyboard

What is the iPhone?
• Sensors
• Keyboard
• Safari

What is the iPhone?
• Sensors
• Keyboard
• Safari
• Mail

What is the iPhone?
• Sensors
• Keyboard
• Safari
• Mail
• Calendar

What is the iPhone?
• Sensors
• Keyboard
• Safari
• Mail
• Calendar
• Wide Screen Display

iPhone Overview
• Smart Phone +
– iPod (Widescreen)
– Wireless Internet Communication Device
– Wifi 802.11 b/g
– PDA
– Computer (OS X)
– Camera
– App Store

iPhone Development
• Development done with the help of
iPhone SDK (requires an Intel MAC)
– Uses Objective-C
– XCODE + Other tools
– Can submit your application to App Store
– $99 membership
– Review your application + code
– Revenue model
– You set your price (free, 99 cents, $9.99, etc)
– 70% developer (you) and 30% Apple

iPhone Economics

• 30 Million Touch devices
• Assume $1.99 application
• Popular app - 10% of devices (3 Million)
– $6 Million = $4.2 Million to Developer!
• Less popular - 1% of devices (300,000)
– $600,000 = $420,000 to Developer!

iPhone SDK
iPhone SDK includes five powerful
iPhone programming tools

1.XCODE
• Professional text editor
• Debugger
• GCC compiler

iPhone SDK

1.XCODE
• Debugger
• GCC compiler
2.Interface Builder
• For creating user interface

iPhone SDK

1.XCODE
• Debugger
• GCC compiler
2.Interface Builder
• For creating user interface
3.Instruments
• For optimizing application

iPhone SDK

4. Dash Code
• For creating web applications for Safari

iPhone SDK

4. Dash Code
• For creating web applications for Safari
5. iPhone Simulator

iPhone OS can be viewed as set of layers

Cocoa Touch Layer
the basic tools to
– Application management
implement
– Graphics and windowing support
graphical, event-
driven applications – 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 photo library
– Device-specific information

Media Layer
provides graphics and
media technologies for
creating advanced
multimedia experiences
– Graphics Technologies
– Core Audio
– OpenAL
– Video Technologies

Core Services

Provides fundamental or
core system services that
all applications use – Address Book
– Core Location
– CFNetwork
– Security
– SQLite

Core OS
• encompasses the kernel
environment, drivers, and basic – Threading (POSIX
interfaces of the operating system threads)
• Provides access to low-level – Networking (BSD
features of the operating system sockets)
– File-system access
– Standard I/O
– Bonjour and DNS
services
– Location information
– Memory allocation

iPhone Hardware and Software Features
Available to Applications
• Accelerometer
– iPhone and iPod touch have 3 accelerometers to
measure/detect movement along each of the primary (x,
y, and z) axes in three-dimensional space
– The system uses the accelerometers to monitor a
device’s current orientation and to notify applications
when that orientation changes
– Applications can access accelerometer data directly


• Core Location
– Core Location monitors signals from cell towers
and Wi-Fi hotspots to triangulate the user’s current
position
– Accuracy of location information and threshold for
reporting location changes can be specified
– Use sparingly – drains battery

• Contacts
– The Phone, Mail, and SMS Text applications use
contact list to identify contacts and to facilitate
basic interactions such as starting a phone call,
email, or text message
– Your applications can access contacts for similar
purposes or to get other information relevant to
your application

• The Camera and Photo Library
– iPhone has a camera and photo library -- iPod
Touch has no camera
– iPhone OS provides access to both of these
features
– You can incorporate system-provided picker
interfaces into your application
– These interfaces provide standard system views
for selecting a photo from the user’s photo
library or taking a picture using the camera

App Distribution
Three methods of distribution:
– App Store
• Wi-Fi/EDGE/HSDPA on iPhone
• Desktop syncing via iTunes
– Enterprise
• Proprietary in-house apps
• Requires 500+ employees
– Ad-hoc
• Provide users with app via email/website
• Requires users to register their device ID
with the developer
• 100 device limit per app 72

Downloading Apps
App Store distribution method determined by size:
– Apps < 10 MB can be downloaded over
the cellular network
– Apps > 10 MB require WiFi connectivity
or side loading via iTunes

73

Classes of iPhone Applications
• We can define three types of iPhone
applications:
– Productivity
– Utility
– Immersive

What’s Different About
Programming for the iPhone?
• Only one running application
• Only one window
• Limited access - sandbox
• Limited response time - 5 seconds
• Limited screen size - 480 x 320 pixels
• Limited system resources (RAM + storage)
• No keyboard or mouse
23

iPhone Developer University
Program
a free program designed for higher education
institutions looking to introduce curriculum
for developing iPhone or iPod touch
applications. The University Program
provides a wealth of development resources,
sophisticated tools for testing and debugging,
and the ability to share applications within the
same development team. Institutions can also
submit applications for distribution in the App
Store.

http://developer.apple.com/iphone/program/university.html

Program
Student Development Team
The iPhone Developer University
Program allows instructors and
professors to create a development
team with up to 200 students.

Program
The iPhone Developer University Program
includes:
• iPhone SDK
• iPhone Dev Center Resources

Program
• Testing on iPhone and iPod touch

Program
• Internal or App Store distribution

iPhone/SDK Recommendations
– Optimize Web Site for Mobile Devices
– Computer Science  iPhone University Developer
Program
– Create iPhone App for Marketing
– Create iPhone App for Registration/Student
Services
– Integrate iPhone into Classroom Activities
– Also Investigate Google’s Android App Store and
RIM’s Blackberry App Store

Join us Summer 2009 in Phoenix

watch ate-con.org for details

iPhone SDK overview for app development

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