Very nice iOS Development Resources

Blog which shows how to draw graphs in Objective-C:

http://www.sitepoint.com/creating-a-graph-with-quartz-2d/

Blog which shows database operations using SQLite library in iOS:

http://www.tutorialspoint.com/ios/ios_sqlite_database.htm

Steps to port an iPhone application to work on iPad:

http://www.raywenderlich.com/1111

Blog which shows the implementation of UICollectionViewController

http://nscookbook.com/2013/02/ios-programming-recipe-14-implementing-a-uicollectionviewcontroller/

Important links for beginning development of iOS Applications

A blog giving full details of running an app on a device:

http://www.raywenderlich.com/8003/how-to-submit-your-app-to-apple-from-no-account-to-app-store-part-1
http://www.raywenderlich.com/8045/how-to-submit-your-app-to-apple-from-no-account-to-app-store-part-2
http://www.raywenderlich.com/8045/

It is possible to get an app running on a device before actually submitting it for approval.

Another blog showing how to get an app running on a real device:
http://docs.appcelerator.com/titanium/2.0/#!/guide/Deploying_to_iOS_devices

Another blog for the steps to follow:
http://mobile.tutsplus.com/tutorials/iphone/how-to-test-your-apps-on-physical-ios-devices/

Blog which gives the steps to test iOS apps on jail-broken devices:
http://techtalktone.wordpress.com/2011/12/05/testing-your-ios-apps-on-a-jailbroken-device-2/