How to pop up a UIView like alert on another UIView?

Hi I am new to iPhone development,

I want to Pop up Login page view on an existing view.My application is navigation based application.

Just like alert popsup on a view, in the same manner i wa开发者_StackOverflow中文版nt to pop-up my login page. Please help...

Thanks in advance:)

Regards Aparna

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just add:

[self presentModalViewController:loginViewController animated:YES];

when the login button is pressed, where loginViewController is the controller of the required view to be presented modally.