Tableview滚动时不会加载更多数据

Question

i make an application that contain five view with segment controller my Views Name is NEWS,INTERVIEW,REVIEW,GALLERY etc.Here NEWS and INTERVIEW View Controller contain tableview with JSON Data Parsing when my application run then First load NEWSView when i first scroll it then it load more data but when segment InterviewViewController and First scroll it and then scroll a NEWS Table then it not load a more data please give me solution my Code is

- (void)viewDidLoad
 {
pageNum=0;
self.imageArray =[[NSMutableArray alloc]init];
NSURL * url=[NSURL URLWithString:[NSString stringWithFormat:@"http://www.truemanindiamagazine.com/webservice/news.php?page=%d",pageNum]];
[self.newsTable setShowsHorizontalScrollIndicator:NO];
[self.newsTable setShowsVerticalScrollIndicator:NO];
[super viewDidLoad];
dispatch_async(kBgQueue, ^{
    data = [NSData dataWithContentsOfURL: url];
    [self performSelectorOnMainThread:@selector(fetchedData:) withObject:data waitUntilDone:YES];
});
[self.spinner startAnimating];

}
-(void)fetchedData:(NSData *)responsedata
{
NSError* error;
self.json = [NSJSONSerialization JSONObjectWithData:responsedata options:kNilOptions error:&error];
if ([[_json objectForKey:@"data"] isKindOfClass:[NSArray class]])
{
    NSArray *arr = (NSArray *)[_json objectForKey:@"data"];
    [self.imageArray addObjectsFromArray:arr];
    [self.newsTable reloadData];
    NSLog(@"images,%@",self.imageArray);
}
[self.spinner stopAnimating];
self.spinner.hidesWhenStopped=YES;
}
-(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return self.imageArray.count;
}
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
if (self.imageArray == nil || self.imageArray.count <1)
{
    return 0;
}
else
{
    return 1;
}
}
-(CustumCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *Cellidentifier=@"Cell";
CustumCell *cell=[tableView dequeueReusableCellWithIdentifier:Cellidentifier];
if (cell ==nil)
{
    NSArray *nib = [[NSBundle mainBundle] loadNibNamed:@"CustumCell" owner:self options:nil];
    cell = [nib objectAtIndex:0];
}
{
    NSDictionary *dict = [self.imageArray objectAtIndex:indexPath.section];
    NSString *img2=[dict valueForKey:@"post_image"];
    [cell.imagePhoto sd_setImageWithURL:[NSURL URLWithString:img2] placeholderImage:[UIImage imageNamed:@"Hisoka.jpg"]];


    NSString *title=[dict valueForKey:@"post_title"];
    cell.headLabel.text=title;

    NSString *contents=[dict valueForKey:@"post_content"];
    if([contents isKindOfClass:[NSString class]])
    {
        cell.descriptionLabel.text = contents;
    } else
    {
        cell.descriptionLabel.text =  @"";
    }
    NSDateFormatter * dateFormatter = [[NSDateFormatter alloc]init];
    [dateFormatter setDateFormat:@"yyyy-MM-dd hh:mm:ss"];
    NSString *date=[dict valueForKey:@"post_date"];
    NSDate * dateNotFormatted = [dateFormatter dateFromString:date];
    [dateFormatter setDateFormat:@"d-MMM-YYYY"];
    NSString * dateFormatted = [dateFormatter stringFromDate:dateNotFormatted];
    cell.dateLabel.text=dateFormatted;


}
return cell;
}
-(void)scrollViewDidScroll:(UIScrollView *)scrollView
{
pageNum = pageNum + 1;
[self getData];
}
-(void)getData {
NSURL * url=[NSURL URLWithString:[NSString stringWithFormat:@"http://www.truemanindiamagazine.com/webservice/news.php?page=%d",pageNum]];
dispatch_async(kBgQueue, ^{
    data = [NSData dataWithContentsOfURL:url];
    [self performSelectorOnMainThread:@selector(fetchedData:) withObject:data waitUntilDone:YES];
});
}

-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
NSDictionary *dictionary=[self.imageArray objectAtIndex:indexPath.section];
NSString *url=[dictionary valueForKey:@"link"];
[[UIApplication sharedApplication]openURL:[NSURL URLWithString:url]];
}
-(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
return 80;
}

Answer 1

Add this scrollView Delegate method. Inside it add you code:

Note: Do not give multiple request with getData method .(After get the request result after that only give other result- do it in your own idea)

-(void)scrollViewDidEndDragging:(UIScrollView *)scrollView willDecelerate:(BOOL)decelerate
{
  NSInteger currentOffset = scrollView.contentOffset.y;
    NSInteger maximumOffset = scrollView.contentSize.height- scrollView.frame.size.height;
    if (maximumOffset - currentOffset <= 0) {

     // do your code here.
     [self getData];

    }
}


-(void)getData {
NSURL * url=[NSURL URLWithString:[NSString stringWithFormat:@"http://www.truemanindiamagazine.com/webservice/news.php?page=%d",pageNum]];
dispatch_async(kBgQueue, ^{
    data = [NSData dataWithContentsOfURL:url];
    [self performSelectorOnMainThread:@selector(fetchedData:) withObject:data waitUntilDone:YES];
});
}