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POfetch JSON data asynchronously
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copied!<p>I want to fetch JSON data asynchronously. The data is set up in a way that one request will bring only 8 records. I need to send the requests repeatedly until the response becomes empty or returns less than 8 records. </p> <p>Currently, I have these methods in myviewcontroller.m class:</p> <pre><code>(void)myCallback:(id)sender { MyDataRequest *objMyDataRequest = [[[MyDataRequest alloc] init] autorelease]; objMyDataRequest.myRequiredVariableToGetAuthTokenDataResponse = classOfMyCallBack.someVariable; // Initiate getAuthToken request [objWishListRequest initiateGetAuthTokenRequest:self requestSelector:@selector(getAuthTokenDataResponse:)]; } </code></pre> <p>Now here is the definition of getAuthTokenDataResponse:</p> <pre><code>(void) getAuthTokenDataResponse:(NSData *)data { NSString *stringResponse = [[NSString alloc] initWithData:data encoding:NSASCIIStringEncoding]; SBJsonParser *parser=[[SBJsonParser alloc]init]; NSDictionary *objDictionaryForStringResponse = [parser objectWithString:stringResponse]; [stringResponse release]; [parser release]; MyListRequest *objMyListRequest = [[[MyListRequest alloc] init] autorelease]; objMyListRequest.myRequiredValueToGetMyDataResponse = [objDictionaryForStringResponse objectForKey:@"Data"]; // Initiate GetMyDataResponse request [objMyListRequest initiateGetMyDataRequest:self requestSelector:@selector(getMyDataResponse:)]; } (void) getMyDataResponse:(NSData *)data { NSString *stringResponse = [[NSString alloc] initWithData:data encoding:NSASCIIStringEncoding]; SBJsonParser *parser=[[SBJsonParser alloc]init]; NSDictionary *objGetMyDataRootDictionary = [parser objectWithString:stringResponse]; [stringResponse release]; [parser release]; NSDictionary *dataElements=[objGetMyDataRootDictionary objectForKey:@"Data"]; Wish *objMyData; for (NSDictionary* objGetMyDataRootDictionary in dataElements) { objMyData = [[Wish alloc]init]; //add different elements from dataElements into member variables of object objWish [self.myDataArray addObject:objMyData]; [objMyData release]; } [self.myDataTableView reloadData]; } </code></pre> <p>This method lies in MyDataRequest class:</p> <pre><code>(void)initiateGetMyDataRequest:(id)requestDelegate requestSelector:(SEL)requestSelector{ // Set the delegate and selector self.delegate = requestDelegate; self.callback = requestSelector; NSString* unescapedUrlString = [NSString stringWithFormat:@"http://test.mytesturl.com/core.svc/alldata/My/get/All/?token=%@&search=&page=1",myRequiredtokenparameter]; [self request:url]; } </code></pre> <p>I need to send multiple requests to the same url (with different parameter value i.e. value of page number) to fetch the results. How may I achieve it given the above scenario? The calls must be asynchronous. </p> <p>How should I make the actual flow between all these calls? How may I get the data of "all the pages" asynchronously?</p>

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