On Oct 5, 2009, at 12:51 PM, jon wrote:
i have a webView loading, and need to wait until it is finished
loading...
so far i've set up this notification in the wakeFromNib:
NSNotificationCenter *center = [NSNotificationCenter
defaultCenter];
[center addObserver:self
selector:@selector(webViewProgressFinished:)
name:WebViewProgressFinishedNotification object:offScreenWebView];
and then i have a selector/method like so, with nothing in it,
because i'm not sure what to put in it yet...
- (void)webViewProgressFinished:(NSNotification*)notification
{
NSInteger i = 1;
}
and then i have a the main method that is running along, and at a
certain point below i need to wait for that notification to fire...
Or that method to fire... same thing...
i need a little push in the correct direction, because i really am
stumped in whether to use some sort of NSRunLoop, or NSEvent, or
what would it be?
URLToLoad = [NSURL URLWithString:theUrlString];
[offScreenWebView setFrameLoadDelegate:self];
[[offScreenWebView mainFrame] loadRequest:[NSURLRequest
requestWithURL:URLToLoad]];
[[NSRunLoop currentRunLoop] runUntil... we get that darn message?];
here is where i need to wait until i get that message, or that that
method is fired...
I seem to have the selector firing correctly i believe ... but i
don't know how to wait until it fires?
that is what i have so far...
and help would be appreciated greatly...
thanks,
Jon.
In general you don't want to wait for, uh what did you say? a selector
to fire? You start an asynchronous operation (like loadRequest) and
let the current run loop notify you. Exit the method after you do your
loadRequest. When you get the notification, do your thing to finish it
in webViewProgressFinished -- do the thing that you were waiting to do.
I could be wrong but I think you might actually be blocking the
notification by doing the sit 'n spin bit with [[NSRunLoop
currentRunLoop] runUntil... we get that darn message?];
Is there a reason you have to loop and wait for it to finish instead
of doing more work in the notification method? If there is then maybe
you should use a lock to synchronize the threads instead of waiting.
You might want to tell us more about what you're trying to do.
Matt
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