November 10th, 2011
This small plugin for Joomla! add a message inviting iPhone/iPad users to add the web application to the home screen. It also optimize your site by adding all meta that are recognized by Apple iOS browser: autorize resize, screen ratio, startup picture, web app optimize rendering and much more.
The code is compatible with iPhone/iPod touch, iPhone4 and iPad. On older devices the “add” icon is a “+” while on iOS 4.2 it has been replaced with . The script detects the OS version and displays the appropriate icon. The message appears after 2 seconds (customizable) from page load, and is destroyed after 20 seconds (also customizable). The balloon enters and exits the screen with a quick configurable animation: drop from top, bubble from bottom or fade in/out. Additionally it also let you choose a custom icon for your blog when a visitor adds your website to start screen.
Custom Startup images
Specifying a startup image is available in iOS 3.0 and later. On iOS, similar to native applications, you can specify a startup image that is displayed while your website application launches. This is especially useful when your web application is offline. By default, a screenshot of the web application the last time it was launched is used.
It is possible to override the default message to invite user to add your site to their home screen. In order to be able to support all your visitor locales, you’ll have to edit manually the file /media/plg_system_add2home/add2home.js
Use the viewport meta key to improve the presentation of your web content on iOS. Typically, you use the viewport meta tag to set the width and initial scale of the viewport.
For example, if your webpage is narrower than 980 pixels, then you should set the width of the viewport to fit your web content. If you are designing an Safari on iOS-specific web application, you should set the width to the width of the device.
“email” describes the properties supported by the viewport meta key and their default values. When providing multiple properties for the viewport meta key, you should use a comma-delimited list of assignment statements.
When referring to the dimensions of a device, you should use the constants described in “number” instead of hard-coding specific numeric values. For example, use device-width instead of 320 for the width, and device-height instead of 480 for the height in portrait orientation.