How can I solve this delegate error? - ios

Question

I have a delegate, but it doesn't work without the other delegate line in it:
- (id)initWithData:(NSData *)data delegate:(id <ParseOperationDelegate>)theDelegate {
self = [super init];
if (self != nil) {
self.dataToParse = data;
self.delegate = theDelegate;
}
appDelegate = (XMLAppDelegate *)[[UIApplication sharedApplication] delegate];
return self;
}
It should load data in a Cell but the data isn't shown before the first scroll. What can I do?
EDIT:
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *CellIdentifier = #"productCell";
static NSString *PlaceholderCellIdentifier = #"placeholderCell";
int nodeCount = [appDelegate.products count];
if (nodeCount == 0 && indexPath.row == 0) {
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:PlaceholderCellIdentifier];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:PlaceholderCellIdentifier];
cell.detailTextLabel.textAlignment = UITextAlignmentCenter;
cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
}
cell.detailTextLabel.text = #"Loading...";
return cell;
}
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
}
if (nodeCount > 0) {
XMLProductView *listedProduct = [appDelegate.products objectAtIndex:indexPath.row];
cell.textLabel.text = listedProduct.name;
// cell.detailTextLabel.text = appRecord.artist;
if (!listedProduct.productImage) {
if (self.tableView.dragging == NO && self.tableView.decelerating == NO) {
[self startImageDownload:listedProduct forIndexPath:indexPath];
}
UIImageView *listedImage = (UIImageView *)[cell viewWithTag:1];
listedImage.image = [UIImage imageNamed:#"Placeholder.png"];
}
else {
UIImageView *listedImage = (UIImageView *)[cell viewWithTag:1];
listedImage.image = listedProduct.productImage;
}
}
return cell;
}

Answer 1

your code seems that its waiting for some event, or some files to get fetched or downloaded, so you will need to call [tableview reloadData]; when this data is downloaded,
I cant figure it out from the code, but my guts tells me this
1st:
that you are waiting for data from int nodeCount = [appDelegate.products count]; to be ready, so you will need to have some sort of delegate that gets called when this data is ready
2nd:
you are waiting for an image to get downloaded here [self startImageDownload:listedProduct forIndexPath:indexPath], so when this actually get downloaded you will need to set the image to that cell or reloadData on the table
That is what i can figure out from the code.