iPhone DevelopmentAbsolute beginners guide to...

Barry Ezell

September 26th - Dev Day

USF College of Business

September 27th - Media Day

Technology Unconference

http://barcamptampabay.com

• Intro to the Intro

• What you need: Hardware

• What you need: Software

• What you need: Wetware

• Code!

• Submit

All about me

• Ruby, C#, Erlang

• iPhone beginning 3/2009

• One app in store (SuccessIts)

• One submitted (Bookmark, bookmarkapp.com)

• Several in works

You don’t have to be a fanboy

• Accelerometer, camera, video, magnetometer, iPod, touch, OpenGL

• Over 37M units sold (4/2009)

• Over 1.5B app downloads

• $2.4B a year in sales

Pros

• Controlled, predictable platform

• 320x480 px

• Good documentation

• Apple handles sales

Cons

• All Apple all the time

• Their hardware

• They approve / reject apps

• No alternative app store

• You can use any language as long as it’s Objective-C

WYN: Hardware

• Intel-based Mac running Leopard or S.L.

• iPhone / iPod Touch

WYN: Software

XCode et al.

• XCode 3.x and Instruments on install disk under “Optional Installs”

• Download iPhone SDK, simulator from Apple (after joining dev program)

• All free

Registered iPhone Developer Programhttp://developer.apple.com/iphone/

Free Test using the simulator, no sales

Standard ($99/yr) Test on devices, unlimited sales in App Store

Enterprise ($299/yr) Unlimited in-house distribution, no App Store sales

WYN: Wetware

• Learn Objective-C

• Learn Cocoa Touch, Frameworks

Objective-C

Square brackets represent!

• OO, strict superset of C, inspired by Smalltalk messaging

• Any valid C or C++ code works

• You handle memory management

• [object retain];

• [object release];

• Objects are passed messages with descriptive arguments

Messaging

coyote.hunt(roadRunner,rocketSkates,true);

• Apple’s Object-Oriented Programming with Objective-C http://bit.ly/13QlgA

• Peepcode screencast series: Objective-C for Rubyists

• Programming in Objective-C 2.0 by Stephen G. Kochan

Resources

Cocoa Touch

• Desktop Cocoa adapted for the iPhone

• Frameworks:

• UIKit (touch, windowing, accelerometer)

• CoreGraphics (Quartz, PDF, animation)

• CoreLocation (GPS)

• MediaPlayer (iPod)

• Many more

Resources

• Pragmatic Programmer: iPhone SDK Development by Bill Dudney

• iPhone Developer’s Cookbook by Erica Sadun

• Interwebs: iphonedevsdk.com, Apple forums, Google

Let’s Code

• Finally!

• TweetCount

• XCode > New Project > Utility Application

One Window, many Views

UITableView

One Window, many Views

UIImageView

UIProgressView

UIButton

UILabel

• Normally both called “nibs”

• “Freeze-dried” objects, interface elements, and relationsips

• Normally single .xib launched at app start

.nib or .xib files

IBOutlet & IBAction

• IBOutlets allow getting and setting properties on objects in IB

• IBActions allow objects to receive events like touches or value changes

Test on Devices

• Simulator != iPhone

• Get Provisioning Profiles and Development Certificates on iPhone Dev Portal

• Make life easier with wildcard naming: com.barryezell.*

• Configure app for device testing

• Change Active SDK to “Device”

• Set Signing Identity under Project > Edit Project Settings

• Set your App ID in info.plist file

Device Testing

• Set Release configuration

• Set App Store Signing Identity

• Add artwork (57x57, 512x512 icons)

• Compile and zip with 57x57 icon

Submit to Apple

Upload to iTunes Connect

Tips while waiting on Apple

• Avoid cracks in sidewalk

• Ditto walking under ladders

• Try to forget you ever invested all that time

Resource of Resources

• http://theappleblog.com/2009/06/01/43-iphone-development-resources