iOS 6 - Apple rilascia la beta 3 agli sviluppatori, ecco il change-log (7/7)

iOS 6 - Apple rilascia la beta 3 agli sviluppatori, ecco il change-log

17 Luglio 2012 | Max Capitosti

Safari & WebKit

WebKit on iOS now supports the requestAnimationFrame and cancelAnimationFrame
methods in JavaScript, as described here http://www.w3.org/TR/animation-timing/.

Note that because the specification is still at the Working Draft state, these
methods have the webkit prefix, so they are window.webkitRequestAnimationFrame,
window.webkitCancelAnimationFrame.

The default app cache quota has been increased from 5MB to 25MB.

The JPEG subsampling threshold was increased from 2 MP (megapixels) to 5 MP
on all supported hardware except iPhone 3GS and iPod touch (4th gen).

Support has been added for <input type='file'> tags in web
forms. Users can upload existing photos and videos from their photo library
or take a picture or video using the camera. Previously this form control was
always disabled.

With Safari 6.0 on OS X, developers can now use the Web Inspector (web development
tool) with attached iOS devices and iOS Simulator. Developers can use the Web
Inspector to debug Safari and the UIWebView class in their own apps built and
run from Xcode. This replaces the Debug Console banner in Safari.

In iOS 6 and later, web data (SQL Web Storage and LocalStorage) from a UIWebView
object can be stored in a directory that will be backed up. To enable backing
up this data, set the WebKitStoreWebDataForBackup key to YES in your app's user
defaults. This should be done only if your app relies on web content data that
cannot be reloaded. If your UIWebView object opens links to arbitrary web content,
this key should be set to NO. Toggling the value of this key will not preserve
existing web view data.

In iOS 6 and later, Safari no longer registers for the common feed: RSS/ATOM
scheme. Apps that can view those types of feeds are encouraged to register for
that URL scheme.

WebKit no longer always creates hardware-accelerated layers for elements with
the -webkit-transform: preserve-3d option. Authors should stop using this option
as a way to get hardware acceleration.

Experimental CSS3 Flexbox support will be disabled. Please switch from using
-webkit-flexbox and -webkit-inline-flexbox to -webkit-box and -webkit-inline-box.

As of iOS 6, embedded YouTube URLs in the form of http://www.youtube.com/watch?v=oHg5SJYRHA0
will no longer work. These URLs are for viewing the video on the YouTube site,
not for embedding in web pages. Instead, the format that should be used is described
in https://developers.google.com/youtube/player_parameters.

In iOS 6, the keyboardDisplayRequiresUserAction property was added to the
UIWebView class. The property defaults to YES, which means that calling focus()
on a form element will not bring up the keyboard. By changing the property to
NO, a JavaScript call to focus() on a form element will focus the element and
automatically bring up the keyboard.

As of iOS 6, calling focus() on a form element in a web app will focus the
element.

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