ios - Retina Display Images on iPhone -

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possible duplicate:
how accommodate iphone 4 screen resolution?

what best way include retina display images on iphone app. there issues iphone 3g or older iphone higher res images?

include hi-res version of image named "image@2x.png" (where "image.png" normal resolution). when access image using [uiimage imagenamed:@"image.png"], correct 1 chosen automatically. devices without retina display won't load hi-res version, there's no memory overhead.


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