My website displays perfectly on both iPhone 4 and iPhone 4S

In my mobile web application, I create graphics using CSS3/HTML5.

While the graphics look great on iPhone3G and iPhone3GS due to their similar pixel ratio,

they appear exactly the same on iPhone4 and iPhone4S despite the better pixel ratio of the latter.

My query is:

Is there a way to compel the iPhone4 device to utilize its pixel ratio instead of defaulting to the iPhone3G's ratio?

I notice a difference in graphics quality when saved to the device's drive and viewed in Camera Roll between iPhone3G and iPhone4. I wish to replicate this disparity on the web as well.

iphonecsshtmlmobile

Answer №1

It is a fact that the iPhone 4 boasts a 326-DPI screen, which is twice as sharp as the original iPhone screen. This enhancement results in the new device having double the width and height within the same physical screen size. Consequently, Apple opted to maintain consistent CSS, viewport, and JavaScript dimensions with the low-DPI device at 320x480 pixels, establishing a pixel ratio of 2. With this setup, every pixel displayed will actually be represented by four real pixels (equivalent to 2x zoom). As a result, your website will appear uniform across both the iPhone 3GS and iPhone 4 models. In case you wish to display high-DPI images, you can utilize a media query condition like -webkit-min-device-pixel-ratio:

<link media="all and (-webkit-min-device-pixel-ratio:2)" href="iphone4.css" type="text/css" rel="stylesheet" />

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