Hi,
well i have search a lot for iphone material to get started ,
but i found most of the stuff that divided either in iphone development or in learning objective C only.
Can someone please send me links/ebooks/articles/videos where once can learn objective c and iphone together ?
It is arguably better if you learn objective-c before delving into the iphone framework (Cocoa Touch and associated frameworks). The iphone sdk is built around objective-c and a firm understanding of the language is absolutely essential for understanding the documentation about how to use the iphone sdk.
Having said that, an excellent book that teaches objective-c and then provides an introductiojn to iphone programming is Kochan's Programming in Objecitve-C This will get you up and running with objective-c in a minimal amount of time, after which you can start with Beginning iPhone 3 Development for a thorough coverage of the main iphone sdk paradigms.
There are online courses on iPhone application development on iTunesU which, to my knowledge, are aimed specifically at students that have no prior Objective-C experience. I can recommend the course at RWTH Aachen University but I have heard good things about the Stanford course as well.
I don't think you have looked very hard. Just look at the sidebar on this question and you will find plenty of questions/answers already on this site. For example, http://stackoverflow.com/questions/1939/how-to-articles-for-iphone-development-objective-c.