UIScrollView in custom table cell at cellForRowAtIndex path not working - iphone

Question

I'm trying to implement a UIScrollView in each cell of `UITableView'. I wrote my code based on Apple's custom Scrollview project: https://developer.apple.com/library/ios/#samplecode/Scrolling/Listings/ReadMe_txt.html
Each table cell's UIScrollView scrolls through a set of labels, which are initialized in the cellForRowAtIndexPath method. Each label's text is set after initialization to equal a string from an array.
Everything works correctly until I scroll down to the 4th table cell. The UIScrollView in this cell has the same exact labels as the first cell. The same first 3 set of labels or the first 3 scrollViews keep repeating after the first 3 cells. The strange part is, when I log the label.text after it is set, the output shows the correct label.text of what should be displaying in the respective cell.
- (void)layoutScrollLabels: (float)arrayCount
{
UIView *view = nil;
NSArray *subviews = [cell.popularLinkScrollView subviews];
// reposition all image subviews in a horizontal serial fashion
CGFloat curXLoc = 0;
for (view in subviews)
{
if ([view isKindOfClass:[UILabel class]] && view.tag >= 0)
{
CGRect frame = view.frame;
frame.origin = CGPointMake(curXLoc, 0);
view.frame = frame;
curXLoc += (kScrollObjWidth);
}
}
[cell.popularLinkScrollView setContentSize:CGSizeMake((arrayCount * kScrollObjWidth), [cell.popularLinkScrollView bounds].size.height)];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"Custom Cell";
cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[CustomCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
NSDictionary *dictionary = [parseDataArray objectAtIndex:indexPath.row];
NSArray *popularLinkTitleArray = [dictionary objectForKey:#"popularLinkTitleArray"];
cell.popularLinkScrollView.clipsToBounds = YES;
kScrollObjHeight = cell.popularLinkScrollView.frame.size.height;
kScrollObjWidth = cell.popularLinkScrollView.frame.size.width;
NSUInteger i;
for (i = 0; i < popularLinkTitleArray.count; i++)
{
NSString *string = [NSString stringWithFormat:#"%#", [popularLinkTitleArray objectAtIndex: i]];
UILabel *label = [[UILabel alloc] init];
label.text = [NSString stringWithFormat:#"%#", string];
label.backgroundColor = [UIColor clearColor];
label.numberOfLines = 5;
NSLog(#"%#", label.text);
// setup each frame to a default height and width, it will be properly placed when we call "updateScrollList"
CGRect rect = label.frame;
rect.size.height = kScrollObjHeight;
rect.size.width = kScrollObjWidth;
label.frame = rect;
label.tag = i; // tag our images for later use when we place them in serial fashion
[cell.popularLinkScrollView addSubview:label];
}
[self layoutScrollLabels:popularLinkTitleArray.count];
}
return cell;
}

Answer 1

You should not add label as a subview to popularLinkScrollView in cellForRowAtIndexPath. If the count of labels is required to be dynamic, try this code before your for loop in cellForRowAtIndexPath.
for (UIView* subView in cell.popularLinkScrollView.subviews)
[subView removeFromSuperview];