How to target iPhone 3GS AND iPhone 4 in one media query?

Question

I am trying to implement alternate layouts for both the iPad/iPhone and older iPhones as well.

I have established that the best method is to use @media

Answer 1

I'm not sure I follow your question. Did you try your queries on the iPhone 4? device-width is measured in logical pixels, not physical ones, so the iPhone 4 still fits the max-device-width: 480px criteria.

Same goes for high-end Android smartphones, which have a pixel ratio of 1.5: the Nexus One has a physical screen of 480x800, logical screen of 320x533.

Answer 2

Because the iPhone and iPod touch measure max-device-width in logical pixels rather than physical pixels even with the Retina display (as they should), the original media query used for the iPhone should be enough:

@media only screen and (max-device-width: 480px) {
    /* iPhone CSS rules here */
}

You'll only need (-webkit-min-device-pixel-ratio: 2) if you need to target the Retina display separately.

Answer 3

BoltClock's answer seems pretty good to me at the moment.

However, thinking in to the future, if Apple (or another manufacturer) releases another device with a device pixel ratio of 2, this media query would be used for this device too.

I don't think it's out of the question to assume that this will happen, and that the new device could have a much larger screen, such as an iPad with a retina display.

To make this query only applicable to the iPhone 4 and previous iPhones (and any other device of a similar size)

@media screen and (max-device-width: 480px), screen and (max-device-width: [[IPHONE_4_WIDTH]]px) and (-webkit-min-device-pixel-ratio: 2) {
    /* iPhone CSS rules here */
}

Unsure of [[IPHONE_4_WIDTH]] right now - don't have one on me, and some sites say 480, some say 960. Try replacing with both. (And let me know what you find :) )

Answer 4

I have been hunting for a way to specifically target the iPhone 3 / 3GS per the second part of the request. The most acceptable solution I've found is to tailor the media queries to the fixed parameters of an iPhone 3.

@media only screen 
    and (device-width:320px) 
    and (device-height:480px) 
    and (-webkit-device-pixel-ratio: 1) { ... }

In order to work this query requires that you use Safari's viewport meta tag to fix the browser to 100% with the following:

<meta name="viewport" content="width=device-width, initial-scale=1.0"/>

There are a small number of Android phones that will also get picked up on that query. With the Android Market showing 18.4% of active phones in the potential screen size range of 320x480, only a subset of that will match the device-pixel-ratio on the stock webkit browser. Not perfect, but better than nothing at all.

Lists of phone resolutions

• Slightly outdated but thorough: http://cartoonized.net/cellphone-screen-resolution-by-size.php
• Only 3 listed as a potential match here: http://en.wikipedia.org/wiki/Comparison_of_Android_devices
• Android Market weekly snapshot: http://developer.android.com/resources/dashboard/screens.html

All information was considered as of post date.

Also per mernen's comment #2 to his post here are the docs to target Android devices by pixel density: http://developer.android.com/guide/webapps/targeting.html#DensityCSS