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PONSURLConnection and NSURLConnectionDelegate work on different thread
 

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    <p>as descripted in the title, I did some NSURLConnection like this. But I found that the delegate method couldn't get run. Anyone knows how to deal with it ? </p> <p>edit: my delegate works on the main thread, while NSURLConnection works on an operation queue. Now the case is :NSURLConnection works fine, but delegate won't run.</p> <p>edit 2: I used the class method [NSURLConnection connectionWithRequest: delegate:]</p> <p>here is on my main queue</p> <pre><code> NSOperationQueue *queuePhoto = [[NSOperationQueue alloc] init]; NSInvocationOperation *invocationOperationPhotos = [[NSInvocationOperation alloc] initWithTarget:self selector:@selector(transferToServerAddimages:) object:arrayOfASection]; // [invocationOperationPhotos addObserver:self forKeyPath:@"isExecuting" options:0 context:invocationOperationPhotos]; // [invocationOperationPhotos addObserver:self forKeyPath:@"isCancelled" options:0 context:invocationOperationPhotos]; // [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(&lt;#selector#&gt;) name:@"isExecuting" object:nil]; [invocationOperationPhotos setQueuePriority:NSOperationQueuePriorityHigh]; [queuePhoto addOperation:invocationOperationPhotos]; [mutableArrayPhotoQueue addObject:queuePhoto]; [invocationOperationPhotos release]; [queuePhoto release]; </code></pre> <p>here is my NSURLConnnection:</p> <pre><code>- (void) transferToServerAddimages:(NSArray *) arrayToAdd { NSLog(@"[NSOperationQueue currentQueue]: %@", [NSOperationQueue currentQueue]); NSString *murphoAppPrefix = [[AppDelegate sharedAppDelegate] murphoAppPrefix]; // setting up the request object now NSString *urlString = [murphoAppPrefix stringByAppendingString:@"addPhotos.php"]; NSMutableURLRequest *request = [[[NSMutableURLRequest alloc] init] autorelease]; [request setURL:[NSURL URLWithString:urlString]]; [request setHTTPMethod:@"POST"]; /* add some header info now we always need a boundary when we post a file also we need to set the content type */ // set header value , some random text that will never occur in the body NSString *boundary = @"---------------------------14737809831466499882746641449"; NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@",boundary]; [request addValue:contentType forHTTPHeaderField: @"Content-Type"]; /* now lets create the body of the post */ NSMutableData *body = [NSMutableData data]; // email part [body appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]]; [body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"email\"\r\n\r\n%@", self.trip.whoCreate.email] dataUsingEncoding:NSUTF8StringEncoding]]; // password part [body appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]]; [body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"password\"\r\n\r\n%@", self.trip.whoCreate.psw] dataUsingEncoding:NSUTF8StringEncoding]]; // image part NSInteger subCount=0; for (NSDictionary *aDict in arrayToAdd) { // belonging part [body appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]]; [body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"r_whichShortTrip%d\"\r\n\r\n%@", subCount, [aDict objectForKey:@"r_whichShortTrip"]] dataUsingEncoding:NSUTF8StringEncoding]]; [body appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]]; [body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"uniqueId%d\"\r\n\r\n%@", subCount, [aDict objectForKey:@"uniqueId"]] dataUsingEncoding:NSUTF8StringEncoding]]; [body appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]]; [body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"createdTime%d\"\r\n\r\n%@", subCount, [aDict objectForKey:@"createdTime"]] dataUsingEncoding:NSUTF8StringEncoding]]; UIImage *imageFile = [aDict objectForKey:@"image"]; NSData *imageData = UIImageJPEGRepresentation(imageFile, 1.0); NSString *imageName = [[URLConnect createUUID] stringByAppendingString:@".jpg"]; [body appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]]; [body appendData:[[NSString stringWithFormat: @"Content-Disposition: form-data; name=\"image%d\"; filename=%@\r\n", subCount, imageName] dataUsingEncoding:NSUTF8StringEncoding]]; [body appendData:[[NSString stringWithString:@"Content-Type: application/octet-stream\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]]; [body appendData:[NSData dataWithData:imageData]]; [body appendData:[@"\r\n" dataUsingEncoding:NSUTF8StringEncoding]]; UIImage *thumbnail = [aDict objectForKey:@"thumbnail"]; NSData *thumbnailData = [NSData dataWithData:UIImageJPEGRepresentation(thumbnail, 1)]; NSString *thumbnailName = [[URLConnect createUUID] stringByAppendingString:@".jpg"]; [body appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]]; [body appendData:[[NSString stringWithFormat: @"Content-Disposition: form-data; name=\"thumbnail%d\"; filename=%@\r\n", subCount++, thumbnailName] dataUsingEncoding:NSUTF8StringEncoding]]; [body appendData:[[NSString stringWithString:@"Content-Type: application/octet-stream\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]]; [body appendData:[NSData dataWithData:thumbnailData]]; [body appendData:[@"\r\n" dataUsingEncoding:NSUTF8StringEncoding]]; } [body appendData:[[NSString stringWithFormat:@"\r\n--%@--\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]]; // setting the body of the post to the reqeust [request setHTTPBody:body]; // now lets make the connection to the web [NSURLConnection connectionWithRequest:request delegate:self]; </code></pre> <p>}</p> <p>here is my delegate:</p> <pre><code>- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error { [[[AppDelegate sharedAppDelegate] mArrayOfFailedConnection] addObject:connection]; [connection cancel]; connection = nil; } - (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response { NSLog(@"response: %@", response); } - (void)connectionDidFinishLoading:(NSURLConnection *)connection { NSLog(@"connection: %@", connection); } </code></pre>
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    1. COPlease paste some code
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    2. COIf your thread has no run loop the NSURLConnection won't work.
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    3. COhave u added this line [connection startConnection];
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