I'm not sure where you are looking. This is from WebView.h:
/*
@discussion Notifications sent by WebView to mark the progress of
loads.
@constant WebViewProgressStartedNotification Posted whenever a
load begins in the WebView, including
a load that is initiated in a subframe. After receiving this
notification zero or more
WebViewProgressEstimateChangedNotifications will be sent. The
userInfo will be nil.
@constant WebViewProgressEstimateChangedNotification Posted
whenever the value of
estimatedProgress changes. The userInfo will be nil.
@constant WebViewProgressFinishedNotification Posted when the
load for a WebView has finished.
The userInfo will be nil.
*/
extern NSString *WebViewProgressStartedNotification;
extern NSString *WebViewProgressEstimateChangedNotification;
extern NSString *WebViewProgressFinishedNotification;
,,,
/*!
@method estimatedProgress
@discussion An estimate of the percent complete for a document
load. This
value will range from 0 to 1.0 and, once a load completes, will
remain at 1.0
until a new load starts, at which point it will be reset to 0.
The value is an
estimate based on the total number of bytes expected to be received
for a document, including all it's possible subresources. For
more accurate progress
indication it is recommended that you implement a
WebFrameLoadDelegate and a
WebResourceLoadDelegate.
*/
- (double)estimatedProgress;
John
On Oct 9, 2009, at 1:55 AM, Jickae Davis wrote:
Well, I checked the WebView.h, and didn't find the estimateProgress
method and the three associated notifications.
Then I searched them in the chrome's whole solution, didn't get any
clue too.....
2009/9/28 John Sullivan <sulli...@apple.com>
The Chrome and Safari teams have chosen not to display approximate
progress bars for user interface design reasons.
You can implement a progress bar for a WebKit-based browser by using
the -estimatedProgress method in WebView.h and the associated
notifications WebViewProgressStartedNotification,
WebViewProgressEstimateChangedNotification, and
WebViewProgressFinishedNotification.
Note that any such progress bar (in any web browser, WebKit-based or
not) is only an approximation, because as a page loads resources, it
might discover additional resources that need to be loaded, so the
page cannot know in advance how much more there is to load.
John
On Sep 28, 2009, at 12:14 AM, Jickae Davis wrote:
I'm wonderring why Chrome and Safari don't add a progress bar which
indicates the progress of loading a html page.
I took a look at all the ViewMsg and ViewHostMsg in Chrome's src,
and didn't find anything related.
So, is that unimpossible to create such a progress bar?
If it's not so hard, how to achieve that?
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