Load Only Few Cell When Table View DidScroll in ios - ios

Question

I made an application that use JSON Data and WebServices containing more pages when I scroll the UITableView. This fetches and displays the next set of data. Next page consists of 10 sets of data. But I only want to show 5 of them. How is it possible? If possible, please share the code.
Here's my code :
-(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];
});
}
And fetch data method code :
-(void)fetchedData:(NSData *)responsedata
{
if (responsedata.length > 0)
{
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
{
return 1;
}
And Remaining Code is :
{
[super 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];
SDWebImageManager.sharedManager.imageDownloader.maxConcurrentDownloads = 3;
SDWebImageManager.sharedManager.imageDownloader.executionOrder = SDWebImageDownloaderLIFOExecutionOrder;
dispatch_async(kBgQueue, ^{
data = [NSData dataWithContentsOfURL: url];
[self performSelectorOnMainThread:#selector(fetchedData:) withObject:data waitUntilDone:YES];
});
}
}
-(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];
}
{
[cell.spinner startAnimating];
NSDictionary *dict = [self.imageArray objectAtIndex:indexPath.section];
NSString *img2=[dict valueForKey:#"post_image"];
[cell.imagePhoto sd_setImageWithURL:[NSURL URLWithString:[img2 stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]] placeholderImage:[UIImage imageNamed:#"Setting.png"] options:SDWebImageHighPriority completed:^(UIImage *image, NSError *error, SDImageCacheType cacheType, NSURL *imageURL)
{
[cell.spinner stopAnimating];
cell.spinner.hidesWhenStopped=YES;
}];

Answer 1

Take a temparary array alloc and try to add the data from the server to this arrray.
Now I do the implementation for this.
-(void)scrollViewDidScroll:(UIScrollView *)scrollView
{
if([mTenarray count]==0) {
pageNum = pageNum + 1;
[self getData];
} else {
[self.imageArray addObjectsFromArray:mTenarray];
[mTenarray removeAllObjects];
[self.newsTable reloadData];
}
}
-(void)fetchedData:(NSData *)responsedata
{
if (responsedata.length > 0)
{
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.mTenarray addObjectsFromArray:arr];
NSArray *mfivedatarray = [self.mTenarray subarrayWithRange:NSMakeRange(0, 5)];
[self.imageArray addObjectsFromArray:mfivedatarray];
self.mTenarray // remove first five objects
[self.newsTable reloadData];
NSLog(#"images,%#",self.imageArray);
}
}
[self.spinner stopAnimating];
self.spinner.hidesWhenStopped=YES;
}
In some place I wrote the concept to implement