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I know there is 960 x 640 screen resolution on iPhone4 and 480 x 320 on iPhone3 GS. Does that mean number of max pixels or number of points? I’m actually using points because I’m using functions like CGPointMake and I would like to know what is the max of points. But I’m a little bit confused about how many of them there are and how I should design my code when programming on iPhone3, iPhone4 and maybe above versions.
Those resolutions are in pixels. Almost all of the time, you should be dealing with points. iPhone screens are 320 x 480 points. The right thing happens on a retina display: CGPointMake(160, 240) will always be the center of the screen.