Detecting a tap on a UILabel using UITapGestureRecognizer not performing action - iphone

Question

Edit:
Thanks everyone, but this has gotten to be too general as it is clear there are deeper issues at hand. I'm going to try to delete this question. I appreciate all of your help!
We have a large UITableViewCell with a UILabel inside and we want to detect the user's single tap or touch on that label. We're adding a UITapGestureRecognizer inside of our subclassed UITableViewCell:
CGRect frame = CGRectMake(0, 10, 150, 20);
self.titleLabel = [[UILabel alloc] initWithFrame:frame];
self.titleLabel.text = self.title;
self.titleLabel.userInteractionEnabled = YES;
UITapGestureRecognizer *singleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(expandButtonTapped:)];
singleTap.numberOfTapsRequired = 1;
singleTap.numberOfTouchesRequired = 1;
[self.titleLabel addGestureRecognizer:singleTap];
[cell.contentView addSubview:self.titleLabel];
We've also tried setting the target to the cell's UITableViewController, but same result, the action doesn't get performed. When checking the debugger, the gesture is indeed there and attached to the label.
Edit: After more investigating, if we add a normal UIButton to the cell, it cannot be clicked. Doing more investigating, but here is the cellForRowAtIndexPath method:
- (UITableViewCell*)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
if (![self.metaDataSections count]) {
return nil;
}
ACMTableCellMetaData *metaData = [self metaDataForIndexPath:indexPath];
UITableViewCell *cell = [self.tableView dequeueReusableCellWithIdentifier:metaData.reuseIdentifier];
if (cell == nil) {
cell = [metaData createCell];
cell.selectionStyle = UITableViewCellSelectionStyleNone;
}
cell = [metaData updateCellWithCellForReuse:cell];
return cell;
}
The createCell method:
- (UITableViewCell *)createCell
{
UITableViewCell *cell = [super createCell];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:self.reuseIdentifier];
cell.frame = CGRectMake(CGRectGetMinX(cell.contentView.frame),
CGRectGetMinY(cell.contentView.frame),
CGRectGetWidth(cell.contentView.frame),
ACM_TABLE_CELL_HEIGHT);
[self setupExpandButtonInCell:cell];
}
return cell;
}
updateCell method:
- (UITableViewCell *)updateCellWithCellForReuse:(UITableViewCell *)cell {
UILabel * titleLabel = (UILabel *)[cell.contentView viewWithTag:TITLE_TAG];
titleLabel = self.titleLabel;
self.cell = [super updateCellWithCellForReuse:cell];
return self.cell;
}
I clipped out some code that I don't believe affects anything. The didSelectRowAtIndexPath that is being over ridden in the the subclassed tableview doesn't have anything that would prevent user taps. But strangely, if I put a break point there, it never gets hit when tapping the cells. So I believe there are other issues at play here. We can't see why this is the case however.

Answer 1

If you are writing this code in class, which inherits UITableViewCell, then instead of
[cell.contentView addSubview:self.titleLabel];
use
[self addSubView:self.titleLabel];
make sure to implement
-(void)expandButtonTapped:(parameter type)parameter{
}
in the same class.

Answer 2

I forgot to mention about
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"Cell";
TableCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if(!cell)
{
cell = [[TableCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:#"Cell"];
}
// Configure the cell...
return cell;
}