I am new to iPhone development.I want to start a project and want to know objective-C coding standards like naming, casting, etc.Thanks
Start by reading Apple's iOS Dev Center documentation . It contains many hauts, study guides, and technical materials.
If you are starting a new life and want to learn the basics, Ray Wenderlich has great guides, especially for people who know the language. You can try to start with this lesson that he created . Enjoy the ride :)
Google Objective-C
Some of its rules may be dubious, but it is beautifully concise and covers most keyword constructs.