Re: How to use [NSURL loadResourceDataNotifyingClient:usingCache:] ?

[Yen-Ju Chen]

 Thanx a lot. It works.
 But I notice it doesn't work in the background.
 Is it supposed to be non-blocking ?
 I did something like this:

 [url loadResourceDataNotifyingClient: self Cache: YES];
 NSLog(@"....");

 And it always print "...." after the url finishes loading all the data.

 Yen-Ju

> From: Richard Frith-Macdonald <richard@brainstorm.co.uk>
> To: "Yen-Ju Chen" <yjchenx@hotmail.com>
> CC: help-gnustep@gnu.org
> Subject: Re: How to use [NSURL loadResourceDataNotifyingClient:usingCache:] 
> ?
> Date: Tue, 25 Mar 2003 10:10:33 +0000
>
>
> On Monday, March 24, 2003, at 09:54  pm, Yen-Ju Chen wrote:
>
> > Hi,
> >
> >  I try to use [NSURL loadResourceDataNotifyingClient:usingCahce:],
> >  but it doesn't work at all.
> >  I implement both -URLHandleResourceDidBeginLoading:
> >  and -URLResourceDidBeginLoading: in the client.
> >  But they are never called.
> >  Does it work in GNUstep ? Or am I doing something wrong ?
>
> You are doing something wrong ...
>
> 1. The -URLHandleResourceDidBeginLoading: method is sent to the NSURL 
> object, not to its client.  So implementing this in the client will have no 
> effect.  If you want the method to be called you need to make your object a 
> client of an NSURLHandle rather than an NSURL.
>
> 2. The -URLResourceDidBeginLoading: method is not part of the URLClient 
> protocol, so NSURL clients should not and do not get sent a method 
> notifying them when loading starts.  This is presumably because the only 
> way to make an object a client of an NSURL is by sending the NSURL instance 
> a -loadReasourceDataNotifyingClient:usingCache: method.  ie your code 
> already knows that loading has just begun, so it can tell the client that 
> itsself.  I can't think of any other reason why Apple would have decided 
> not to put a method like that in the protocol.


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