Cannot access tableview cell UISearchBarController - ios

Question

I have a custom UITableView Cell. It contains a custom button with image that shows a check box which can be tapped to show a checked and unchecked image. It works correctly, but once filtering begins using UISearchBarController tapping my custom button within a cell the image does not update properly. Are the results shown in perhaps a different tableview? The methods to update the cell are all called, but the image does not change.
What is more perplexing is: Scrolling the cell out of view and back causes the cell to be displayed correctly.
#define MAINLABEL_TAG 1
#define SECONDLABEL_TAG 2
#define CHECKBOX_TAG 3
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"Cell";
UILabel *mainLabel, *secondLabel;
UIButton *button = [UIButton buttonWithType: UIButtonTypeCustom];
PDFFile *newPDF = [_pdfDocumentFiltered.pdfFileList objectAtIndex: indexPath.row];
//compute label sizes
GLfloat heightOfName = [TextSize computeHeightWithBoldFont: newPDF.documentTitle andViewWidth: 250 andFontSize: 18];
CGFloat heightOfDescription = [TextSize computeHeight: newPDF.description andViewWidth: 250 andFontSize: 16];
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
cell.accessoryType = UITableViewCellAccessoryNone;
//set main label attributes
mainLabel = [[UILabel alloc] initWithFrame:CGRectMake(60.0, 5.0, 250.0, heightOfName)];
mainLabel.tag = MAINLABEL_TAG;
mainLabel.font = [UIFont boldSystemFontOfSize: 18.0];
mainLabel.textAlignment = UITextAlignmentLeft;
mainLabel.textColor = [UIColor blackColor];
mainLabel.autoresizingMask = UIViewAutoresizingNone;
mainLabel.numberOfLines = 9;
mainLabel.lineBreakMode = UILineBreakModeWordWrap;
[cell.contentView addSubview:mainLabel];
//set second label attributes
secondLabel = [[UILabel alloc] initWithFrame:CGRectMake(60.0, heightOfName + 10, 250.0, heightOfDescription)];
secondLabel.tag = SECONDLABEL_TAG;
secondLabel.font = [UIFont systemFontOfSize:16.0];
secondLabel.textAlignment = UITextAlignmentLeft;
secondLabel.textColor = [UIColor darkGrayColor];
secondLabel.autoresizingMask = UIViewAutoresizingNone;
secondLabel.numberOfLines = 20;
secondLabel.lineBreakMode = UILineBreakModeWordWrap;
[cell.contentView addSubview:secondLabel];
[button setFrame: CGRectMake(5.0, 0.0, 52.0, heightOfName + heightOfDescription + 15)];
[button setTag: CHECKBOX_TAG];
[button addTarget: self action: #selector(checkUncheck:) forControlEvents: UIControlEventTouchUpInside];
[cell.contentView addSubview:button];
} else {
mainLabel = (UILabel *)[cell.contentView viewWithTag:MAINLABEL_TAG];
[mainLabel setFrame: CGRectMake(60.0, 0.0, 250.0, heightOfName)];
secondLabel = (UILabel *)[cell.contentView viewWithTag:SECONDLABEL_TAG];
[secondLabel setFrame: CGRectMake(60.0, heightOfName + 10, 250.0, heightOfDescription)];
button = (UIButton *)[cell.contentView viewWithTag:CHECKBOX_TAG];
[button setFrame: CGRectMake(5.0, 0.0, 52.0, heightOfName + heightOfDescription + 15)];
}
mainLabel.text = newPDF.documentTitle;
secondLabel.text = newPDF.description;
if ([newPDF.check boolValue] == YES)
{
NSLog(#"Updating image to YES %i", indexPath.row);
[button setImage: [UIImage imageNamed: #"ButtonCheck"] forState: UIControlStateNormal];
}else{
NSLog(#"Updating Image to NO");
[button setImage: [UIImage imageNamed: #"ButtonUncheck"] forState: UIControlStateNormal];
}
cell.tag = indexPath.row;
return cell;
}
- (IBAction) checkUncheck:(id)sender
{
UIButton *sendingButton = (UIButton *) sender;
UITableViewCell *cell = (UITableViewCell *)[[sendingButton superview] superview];
PDFFile *newPDF = [_pdfDocumentFiltered.pdfFileList objectAtIndex: cell.tag];
[newPDF setCheck: [NSNumber numberWithBool: ![newPDF.check boolValue]]];
[self.table reloadData];
}

Answer 1

You should not tag the cell but you should tag the button correctly.
[button setTag: indexPath.row]; //Tag it properly
button = (UIButton *)[cell.contentView viewWithTag:indexPath.row]; //Fetch it properly
In IBAction,
- (IBAction) checkUncheck:(id)sender
{
UIButton *sendingButton = (UIButton *) sender;
PDFFile *newPDF = [_pdfDocumentFiltered.pdfFileList objectAtIndex: sendingButton.tag];
[newPDF setCheck: [NSNumber numberWithBool: ![newPDF.check boolValue]]];
[self.table reloadData];
}

Answer 2

Reloading the searchDisplayController is necessary. Not sure why but adding this line solves the problem:
[self.searchDisplayController.searchResultsTableView reloadData];
So the updated method is the following:
- (IBAction) checkUncheck:(id)sender
{
UIButton *sendingButton = (UIButton *) sender;
UITableViewCell *cell = (UITableViewCell *)[[sendingButton superview] superview];
PDFFile *newPDF = [_pdfDocumentFiltered.pdfFileList objectAtIndex: cell.tag];
[newPDF setCheck: [NSNumber numberWithBool: ![newPDF.check boolValue]]];
[self.table reloadData];
[self.searchDisplayController.searchResultsTableView reloadData];
}