Mobile Strategy & Product Dev. - iRush
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sponsors
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Mobile Strategy & Product Developemnt.
Andrew W. Donoho, Donoho Design Group, L.L.C.
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Who Am I?
I Head a Small iPhone Development Consulting Practice.I also Write iPhone Code Myself.Former Technology Strategy Analyst.Award Winning Mac OS App & HW Dev.
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The iRush
is almost over.
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The iFairy
retired.
<http://www.flickr.com/photos/bronwyn_2007/>
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It’s About
the Business.
L.Gnome <http://www.flickr.com/photos/lgnome/>
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100+ Million Devices
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Lester: <http://en.wikipedia.org/wiki/User:Lester>
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Feb. 2010Sunday, August 8, 2010
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What About Developing for:
Nokia S60?
BlackBerry?
Android?
Pré?
Market Size and Development Costs
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Which One?
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Which One?
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View Coordinate Systems
Coordinates in UIKit are based on a coordinate system whose origin is in the top-left corner and whosecoordinate axes extend down and to the right from that point. Coordinate values are represented usingfloating-point numbers, which allow for precise layout and positioning of content and allow for resolutionindependence. Figure 2-3 (page 55) shows this coordinate system relative to the screen, but this coordinatesystem is also used by the UIWindow and UIView classes. This particular orientation was chosen to make it
easier to lay out controls and content in user interfaces, even though it differs from the default coordinatesystems in use by Quartz and Mac OS X.
Figure 2-3 View coordinate system
Standard coordinates
y
x
(0,0)
As you write your interface code, be aware of the coordinate system currently in effect. Every window andview object maintains its own local coordinate system. All drawing in a view occurs relative to the view’slocal coordinate system. The frame rectangle for each view, however, is specified using the coordinate systemof its parent view, and coordinates delivered as part of an event object are specified relative to the coordinatesystem of the enclosing window. For convenience, the UIWindow and UIView classes each provide methods
to convert back and forth between the coordinate systems of different objects.
Although the coordinate system used by Quartz does not use the top-left corner as the origin point, for manyQuartz calls this is not a problem. Before invoking your view’s drawRect: method, UIKit automatically
configures the drawing environment to use a top-left origin. Quartz calls made within this environment drawcorrectly in your view. The only time you need to consider these different coordinate systems is when youset up the drawing environment yourself using Quartz.
For more information about coordinate systems, Quartz, and drawing in general, see “Graphics andDrawing” (page 85).
View Architecture and Geometry 552009-01-06 | © 2009 Apple Inc. All Rights Reserved.
CHAPTER 2
Window and Views
320h x 480vSunday, August 8, 2010
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What about Android?
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Moto Droid
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HTC Hero Pro 2
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Moto Cliq & RIM Storm 2
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Group Decision:Market Data or
Active Workshop?
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iTunes:It’s a Channel,
Not a Marketing Engine
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The iFairy
retired.
<http://www.flickr.com/photos/bronwyn_2007/>
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You still have to create durable
demand.
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There is still lots of money being made.
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Maybe the
iFairy didn’t retire.
<http://www.flickr.com/photos/bronwyn_2007/>
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WorkshopDefine the market and market size.Matching the Tech. to the opportunity.Make the platform choices to serve that opportunity.Validate your technology choice.Go to market.
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Define the MarketWant help with their Twitter stream.
They have no time. They are overwhelmed.
ch@tter (view in Feb. 2010)70+ million Twitter users.Strong iPhone Community.Entrenched Competitors.
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Pick The PlatformTweetfall & Screen Real EstateDesktop or Slate? Value prop was based upon making Twitter stream more fun.Always on network. ==> iPadIn April, we hoped for 1 million iPad users in 30 days.
(3 million in 60 days. WoW!)
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Match the Technology
iPad screen ==> large visualization.We’re just starting here.
Database ==> allows for more complex analysis.
New algorithm’s are coming.
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Validate Your ChoicesFollow Lean Startup MethodologiesImplement Early, (on cardboard if you have to.)
Interviews are critical.
Standing offer to listen to your design ideas and buy you a beer to boot.
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Go To MarketMVP “whisper” campaign. (Too quiet)PR session here are useful.Build in techniques to directly engage your customers.Offer to follow our @chatter_onlineEncourage folks to write a review.
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What was that about the Business?
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Questions?Contact: Andrew W. Donoho, Donoho Design Group, L.L.C.
+1 (512) 750-7596
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sponsors
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