I need a registration page in my application which should appear only at the first launch of the application.
I appreciate any help available .
- NSUserDefaults (for saving and loading the registered info) - https://developer.apple.com/library/ios/#documentation/Cocoa/Reference/Foundation/Classes/NSUserDefaults_Class/Reference/Reference.html
- Modal view controllers (for showing the page) -- http://developer.apple.com/library/ios/#featuredarticles/ViewControllerPGforiPhoneOS/ModalViewControllers/ModalViewControllers.html
NSUserDefaults to save the registered info, and at startup, check if that information exists. If it doesn't, show the registration controller and save the info. That way it will only appear once.
A kind soul might do a lot of guesswork about your set up and write a clearer answer, or you could update your question telling us how you have tried to implement this yourself, and how you failed doing so because of [insert reason], and how you would love some hints on that.