Sidwyn Koh presented on the iOS app development process. The presentation covered introducing app development, the conception and research phases, programming fundamentals in Xcode, submitting apps to the App Store, marketing, and maintenance. Key aspects included defining classes, instances, methods, and variables in Objective-C, using data types, and publishing, testing, and updating apps. The presentation provided an overview of the full mobile app development lifecycle.

1. Demystifying iOS App Development
Sidwyn Koh
Founder, The Pragmatic Lab
While waiting, grab the files here: http://pragmaticlab.com/citibank
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2. Presentation
• 50 minutes long
• 10 minutes Q&A
• Save your questions for the end!
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3. Overview
• Introduction
• App Development Process
• Fundamentals of Programming
• Coding Environment
• Creating Your First App
• Q&A
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4. Introduction
• 6 years as a programmer
• 4 years of iOS experience
• 2 years as a businessman
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5. Portfolio
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6. Portfolio
Definition Roomorama Seesmic Home Team News
Stacker FreshLook Xmas iCards NUS High
featured on the App Store
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7. 6

8. Design Mobile Web
Photoshop iOS HTML / CSS
Illustrator Android Javascript
Indesign Ruby on Rails
Fireworks Joomla / Wordpress
Premiere Pro Social Media
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9. Read more at: http://pragmaticlab.com/blog/feature
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10. App Development Process
Conception
Maintenance Research
Marketing Development
Submission
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11. Conception
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12. Why Make an App?
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13. to scratch an itch
to make money to learn something new
Why Make an App?
to waste other people’s time to solve a problem
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14. Conception
Observe
Understand
Innovate
Idea
Picture taken from http://blog.gaborcselle.com/2012_11_01_archive.html
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15. Research
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16. Research
• Scour the App Store
• Be keyword-specific
• Install the top 3 apps
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17. Dictionary!
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18. Dictionary.com Dictionary.
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20. Development
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21. Prerequisites
> OS X 10.6 > Xcode 4.2
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22. Programming Basics
Algebra Programming
x+2=4 x = 2;
Tip: End every programming statement with a semicolon.
myNumber = 3;
Tip: Write your variables in camel case.
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23. Vocabulary
• Class: Type of an object. Also Car
where you write all your code.
• Instance: A specific allocation
of a class
• Methods: Functions that an checkFuel closeDoor
instance performs
• Variable: Quantity visible to all amountOfFuel numberOfDoors
methods in the class
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24. Declaring a Variable
We cannot simply do:
pictureWidth = 8;
pictureHeight = 5;
myPictureArea = pictureWidth * pictureHeight;
We have to do it like this:
int pictureWidth = 8;
int pictureHeight = 5;
float myPictureArea = pictureWidth * pictureHeight;
Tip: Add data types to every variable.
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25. Data Types
Name Type Example
void Void Nothing
int Integer -1,0,2
float Floating point number -0.352, 3.1231
Double precision floating
double 0.5251251251251520
point number
NSString * String What is NSString?
id * id anything
BOOL Boolean 0,1, TRUE, FALSE, YES, NO
Tip: You require asterisks for variables that point to something else.
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26. Demo
Do follow along
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27. Recap
• .h file - summary of methods and variables
• .m file - implementation of methods
• .xib file - drawing and connections
• Properties - things that we are able to control and
access (think variables)
• Action methods - functions, usually to run
algorithms or code (think functions)
• Converting between different data types
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28. Submission
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29. Publishing
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30. Publishing
• Register for $99 iOS Developer Program
(http://developer.apple.com/programs/ios)
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31. Publishing
• Register for $99 iOS Developer Program
(http://developer.apple.com/programs/ios)
• Test on your device
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32. Publishing
• Complete steps (setting plist, build and archive)
• http://developer.apple.com/devcenter/ios/index.action
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33. Publishing
• Prepare app at iOS Provisioning Portal
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34. Publishing
• Upload apps on iTunes Connect
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35. Marketing
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36. Marketing
• Timing
• Competitors, market stability, events
• Public relations
• Blog posts, reviews, early adopters, contests,
press releases
• Serendipity
• Do not use black hat methods (e.g. fake reviews)
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37. Maintenance
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38. Maintenance
• Regularly send updates
• Each update refreshes the reviews in App Store
• Add new features, in-app purchases
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39. Useful Tools
• AppAnnie: Download tracking
• Flurry: Event and audience statistics
• Airbrake: Error tracking
• Parse: Server in the cloud
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40. Next Steps
• Check out our classes on pragmaticlab.com
• Sign up for our mailing list
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43. Thank you!
sidwyn@pragmaticlab.com
Stay up-to-date with our courses:
http://pragmaticlab.com/mailing-list
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