Get The SDK (Software Development
Kit) For iPhone:
After you become an official iPhone app
developer, you can download the SDK for iPhone. The version of SDK
you need to download depends on the operating system you currently
have. The SDK contains all documentations, sample codes etc. The
download may even take few hours.
Get Xcode:
Download XCode as Apple opines that
Xcode is a full-featured IDE built around a smooth workflow that
merges the editing of source code with the build and compile steps
through to a graphical debugging experience - Without leaving the
view of source code. This downloading of XCode may also need huge
time.
Learn Objective C and Program Your
Application
As an iPhone apps developer, you should
get the basics of Objective - C right. Once you learn the basics you
can program your application. It also helps to take screenshots. Some
applications can be built in hours while some may need months of
time.
Test Your Application And Also Get
It Tested By Others:
The SDK also offers you an iPhone
simulator so that you can test your application in it. You can
eliminate some bugs by testing your application.
There may be some bugs that you may not
be able to trace out but others will be able to. Get your application
tested in the app community.
Get Your Application Approved:
After
tracing out all bugs, you can submit your application to itunes to
get it approved. The process of getting it approved may take some
time.