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iPhone and iPad Tutorial: a few things to consider before developing your app

Posted by Dr. Burton on June 10, 2010 in iPad, iPhone, Mobile |

Before you dive to deep in developing for the iPhone, iPod Touch, or the iPad, you do need to take a few minutes to consider the environment for which you  are developing.  I have put a short tutorial together so that you can see all of these things in one place.
[tubepress video=”FsuI7pAhLXE”]

  • Based on Objective-C
  • More info at http://developer.apple.com/iphone/library/documentation/Cocoa/Conceptual/ObjectiveC
  • Only one application running at a time (multi-tasking implemented in OS 4)
  • Only one window
  • Size is fixed to the size of the iPhone screen.
  • Limited Access -Your application will run in its own sandbox
  • Limited Response Time
    • Apps need to be ‘snappy’ (less than 5 seconds)
  • Limited Screen Size
    • 480 x 320 pixels  (iPhone, 3G, & 3GS)
    • 960 x 640 (iPhone 4G)
    • 1024 x 768 (iPad)
  • Limited System Resources
  • 128 mb RAM,  4GB storage  (more like 64mb)
  • Missing Cocoa Tools – No garbage collection

Building an app:

Model – View –Controller  (MVC) is the method used for developing a mobile app with Xcode:
  • Model holds your application’s data
  • View holds the window, controls and other UI
  • Controller Binds the model and view together and decides how to handle user input

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