UITableView only shows data from JSON when I scroll up and down - iphone

Question

UITableView only shows data from JSON array when I scroll up and down. When I load the table view it shows cells but they are blank and as I scroll up and down it then starts showing the data.
How do I show the cells with data without scrolling?
- (void)requestFinished:(ASIHTTPRequest *)request
{
if (request.responseStatusCode == 400) {
NSLog( #"Code already used");
} else if (request.responseStatusCode == 403) {
NSLog( #"Code already used");
} else if (request.responseStatusCode == 200) {
NSLog(#"%#",[request responseString]);
NSString *response = [request responseString];
const char *convert = [response UTF8String];
NSString *responseString = [NSString stringWithUTF8String:convert];
responseArray = [responseString JSONValue];
Nrows = [responseArray count];
}
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier] autorelease];
}
NSDictionary *dict = [responseArray objectAtIndex:indexPath.row];
cell.detailTextLabel.text = [dict objectForKey:#"allfeeds"];
cell.textLabel.adjustsFontSizeToFitWidth = YES;
cell.textLabel.font = [UIFont systemFontOfSize:12];
cell.textLabel.minimumFontSize = 10;
cell.textLabel.numberOfLines = 4;
cell.textLabel.lineBreakMode = UILineBreakModeWordWrap;
cell.textLabel.text = [dict objectForKey:#"allfeeds2"];
cell.selectionStyle = UITableViewCellSelectionStyleNone;
return cell;
}

Answer 1

When you finish your request and you set the array, make sure to call [self.tableView reloadData];
For performance and animation purposes, table views don't reload their data when the source changes.

Answer 2

Instead of starting the request asynchronously (non-blocking)
[request startAsynchronously];
Try doing it synchronously (blocking)
[request startSynchronously];

Answer 3

I had a similar issue and got my answer at the Apple's Developer Forums a while ago, this solved my problem:
From what you've described, I'd guess the problem is more likely to be in cellForRowAtIndexPath or wherever you do the actual configuration of a cell than in the code you've posted. A problem like yours can happen when dequeueReusableCellWithIdentifier gives you back an existing cell, but you don't reset its existing state completely.
The full question and answers can be found here (requires login): https://devforums.apple.com/message/502483#502483

Answer 4

These problems are usually caused by the UITableView cache, that dequeues his available cached UITableViewCell with the same CellIdentifier (in your case - #"Cell").
Try creating a cell identifier for each and everyone of your table's cells. You can create this variance using the NSIndexPath param in the following way :
NSString* cellIdentifier = [NSString stringWithFormat:#"Cell%d",indexPath.row];
That of course, under the assumption you're not changing the content of your cells after you load the data.