UItableView load data on scroll

Question

In my app I am getting the data from the web-service and I have to display it in UITableView. But the condition here is I have to display only 10 records initially,then once

Answer 1

Just insert the new data into your datasource see below

If you're using xml - check out XMLReader - turn XML into an NSDictionary this sample code below uses AFNetworking (which is non blocking) https://github.com/AFNetworking/AFNetworking/

- (void)scrollViewDidEndDragging:(UIScrollView *)scrollView willDecelerate:(BOOL)decelerate
{
    if (!decelerate)
    {
        [self fetchMoreData];
    }
}

- (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView
{
    [self fetchMoreData];
}


- (void)fetchMoreData
{

    if ([resultArray count] > 0)
    {
       NSArray *visiblePaths = [myTableView indexPathsForVisibleRows];
       NSIndexPath *lastRow = [visiblePaths lastObject];

        // Check whether or not the very last row is visible.
        NSInteger numberOfSections = [myTableView numberOfSections];
        NSInteger lastRowSection = [lastRow section];
        NSInteger lastRowRow = [lastRow row];
        NSInteger numberOfRowsInSection = [myTableView numberOfRowsInSection:lastRowSection];

        if (lastRowSection == numberOfSections - 1 &&  
            lastRowRow== numberOfRowsInSection - 1) {

            DLog(@"it's the last row");
            if ([resultArray count]%10 == 0) { // use a divider based on your pagination
               [self fetchNextPage];
            }

        }
    }
}


-(void)getFeeds{
    ENTER_METHOD;

    [resultArray removeAllObjects];
    //reset this
   NSString *url = [NSString stringWithFormat:@"/webserviceurl.xml?offset=0"];
    [httpClient getPath:url parameters:nil success:^(AFHTTPRequestOperation *operation, id responseObject) {

        [self parseFeedsXMLString:operation.responseString];
        //  offset = offset + 10; // ONLY if there's results increment

    } failure:^(AFHTTPRequestOperation *operation, id responseObject){
        NSString *detailError=nil;
     }];

}

-(void)fetchNextPage{

    NSString *url = [NSString stringWithFormat:@"/webserviceurl.xml?offset=%d",offset];
    [httpClient getPath:url parameters:nil success:^(AFHTTPRequestOperation *operation, id responseObject) {


        DLog(@"operation.responseString:%@",operation.responseString);
        [self parseNextFeedsXMLString:operation.responseString];
       // offset = offset + 10; // ONLY increment if there's results 


    } failure:^(AFHTTPRequestOperation *operation, id responseObject){

    }];

}



- (void)parseFeedsXMLString:(NSString *)xmlString
{

    NSError *parseError = nil;
    NSDictionary *xmlDictionary = [XMLReader dictionaryForXMLString:xmlString error:&parseError];
    DLog(@"xmlDictionary:%@",xmlDictionary);
    resultArray = [[NSMutableArray arrayWithArray:[[xmlDictionary objectForKey:@"feed"] objectForKey:@"entry"]]retain];

    [myTableView reloadData];
}

-(void)parseNextFeedsXMLString:(NSString *)xmlString
{

    NSError *parseError = nil;
    NSDictionary *xmlDictionary = [XMLReader dictionaryForXMLString:xmlString error:&parseError];
    DLog(@"xmlDictionary:%@",xmlDictionary);
    //[resultArray insertObject:e atIndex:[resultArray count]];

    NSMutableArray *results  = [NSMutableArray arrayWithArray:[[xmlDictionary objectForKey:@"feed"] objectForKey:@"entry"]];

    if ([results count]) {
        page++;
        for (NSDictionary  *dict in results) {
            [resultArray insertObject:dict atIndex:[results count]];
        }

    }
    [myTableView reloadData];
}