custom popup screen in iOS app - iphone

I am new to iOS app development.
I want to develop a popup screen, that should popup when a button is pressed. In this popup I want to show a Login screen, where user will enter username and password and will submit the credentials. I have following requirements to be fulfilled.
It should support all iOS 5.1 and upwards.
It should also support any device orientation.
It should work for both iPhone and iPad.
It is to be delivered in the form of a library .a file.
It will contain a logo(image) also.
I am not able to find out how should i proceed for this, for BB10 I have used sheets for the same purpose.
Any suggestion on how to develop this for the iOS apps.
thanks.

For your first three requirements will fulfill by adding textfields into alertview and for 4th creating library kindly see this Tutorial. Hope it'll help. Thanks.

#mayank http://code4app.net/category/popupview it contains many project for pop up view it will help you!

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Here are the steps to easily disable the home button :
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Check this out.
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