Creating a login screen to link up to a form in an iOS app

I wish to create a login screen which only shows in the app once and basically it would just have a "Username" and Password" field. When the "Login" button is pressed, I would like the data from the "Username" and "Password" fields to be input into a form and then submit the data to an action (such as "/index.phtml?d=187209&destination_page=187224").

How can I do this, what's the best way of doing it? Seen all the questions on SO but none o开发者_StackOverflowf them are what I need...

Thanks!

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This is a very broad question and will likely be voted down. But generally speaking you need to look at this and this. It's a very easy framework to incorporate into your code. I highly recommend it.