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Those who create responsive design for iPhone may be aware of the viewport scaling bug in iPhone Safari. The bug occurs when you set the viewport width to device-width and rotate the phone to landscape view.
iPhone Safari Viewport Scaling Bug
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» Web Development for the iPhone :: CSS, JavaScript and XHTML Explained
The iPhone 4 features a vastly superior display resolution (614400 pixels) over previous iPhone models, containing quadruple the 153600-pixel display of the iPhone 3GS.
Designing for iPhone 4 Retina Display: Techniques and Workflow - Smashing Magazine
Four years ago, (eight months before the original iPhone was announced) Dave Hyatt wrote about high DPI web sites on the Surfin’ Safari blog:
Targeting the iPhone 4 Retina Display with CSS3 Media Queries - WaltPad
So, um, maybe you heard: there’s a new iPhone out. For my money (and I shelled out plenty for it), the phone’s best feature is the new “Retina display,” the eye-popping high-resolution screen.
Designing for iPhone 4's Retina Display
For three generations of the iPhone, Apple kept the screen consistent (320x480 pixels and 3.5 inches diagonal).
Designing for the Retina Display (326ppi)
iPhone - Safari Screen Dimensions & Layout | iPhone Compatible
Cheat Sheet: iPod Touch, iPhone e iPad Web App Design
Durante lo sviluppo di App o Web App per dispositivi come iPod Touch , iPhone e iPad è necessario seguire alcune convenzioni dovute alle dimensioni dello schermo, la risoluzione, la grandezza della status bar, ecc. iOS Design Cheat Sheet è una raccolta delle specifiche più importanti, e permette a programmatori e web designer di avere sempre a portata di mano tutte queste informazioni in un unico documento. iOS Cheat SheetMaking a webapp for the iPhone is a lot like making a normal web site, but with a few quirks to abide by. In this article, I’ll give you a wide variety of tips, covering things such as: “must-haves”, usability guidelines, testing/debugging, pitfalls, and performance issues.

