UITableViewCell in iPhone 4 and iPhone 3G/GS

I am creating a custom UITableViewCell class in my iPhone app, but I am unclear how to state the dimensions given that the iPhone 2G/3G/3GS and iPhone 4 have different resolution screens.

Clearly, when I programmatically add an element, I'll use calculated coordinates based on the screen resolution, but when I am in interface builder, it draws the dimensions in for me at 3G coordinates (which is the type of device I have开发者_运维技巧).

Does anyone know how to deal with this?

Many thanks, Brett

You're confusing points and pixels. Everything in UIKit deals in points, which on all iPhones is 320x480. On an iPhone 4 1 point == 2 pixels as can be seen from the [[UIScreen mainScreen] scale]