iOS My First iPhone OS Application

I followed "Your First iPhone OS Application" on Apple Development Site, I only change target from "iPhone" to "iPad", anything else is the same as guide.

Now I got screen the color is only part of left top corner about 1/4 of iPad screen, what happened?

How can I let view to scale to fit size of iPad?

No, I didn"t know that, just used default.
Now how can I modify it for iPad?

dejo said:

Since you're not too far into your project, I'd say start over.

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Thanks for your suggestion, I will try again.

dejo said:

P.S. That tutorial is geared towards creating an iPhone app. There may be other things you need to adjust in order to make it an iPad tutorial.

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Do you know where I can find a similar guide for iPad?

I restarted and I got image as below, there is a white line on the bottom of screen, is it right?