UILabel in UITableViewCell not drawing until cell is at top of screen - iphone

Question

I have strange problem with UILabel in a UITableViewCell. It does not appear until I pull the screen down so that the UITableViewCell is at the top. Here is a video of the problem.
http://youtu.be/apTJd1Y4RZk
HEre is the code when the cell is created.
TVC_Location_View_Text *cell = (TVC_Location_View_Text *) [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
NSArray *topLevelObjects = [[NSBundle mainBundle] loadNibNamed:#"TVC_Location_View_Text" owner:nil options: nil];
for(id currentObject in topLevelObjects) {
if([currentObject isKindOfClass:[UITableViewCell class]]) {
cell = ((TVC_Location_View_Text *) currentObject);
break;
}
}
}
UIFont *cellFont = [UIFont fontWithName:#"Helvetica" size:15.0];
CGSize constraintSize = CGSizeMake(300.0f, MAXFLOAT);
CGSize labelSize = [self.sLocationText sizeWithFont:cellFont constrainedToSize:constraintSize lineBreakMode:UILineBreakModeWordWrap];
CGRect rect = CGRectMake(10, 10, labelSize.width, labelSize.height);
UILabel* labelText = [[UILabel alloc] initWithFrame:rect];
[labelText setFont:cellFont];
[labelText setLineBreakMode:UILineBreakModeWordWrap];
[labelText setNumberOfLines:0];
[labelText setBackgroundColor:[UIColor clearColor]];
[labelText setTextColor:appDelegate.colorDarkText];
[cell addSubview:labelText];
[labelText setText:self.sLocationText];
return cell;

Answer 1

Creation of the UILabel should be inside the creation of the cell itself
This is an issue, i dont know if it will resolve your bug, but it still is a bug,
Please change your code to
TVC_Location_View_Text *cell = (TVC_Location_View_Text *) [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
UILabel* labelText;
if (cell == nil) {
NSArray *topLevelObjects = [[NSBundle mainBundle] loadNibNamed:#"TVC_Location_View_Text" owner:nil options: nil];
for(id currentObject in topLevelObjects) {
if([currentObject isKindOfClass:[UITableViewCell class]]) {
cell = ((TVC_Location_View_Text *) currentObject);
break;
}
}
labelText = [[UILabel alloc] initWithFrame:rect];
[labelText setFont:cellFont];
[labelText setLineBreakMode:UILineBreakModeWordWrap];
[labelText setNumberOfLines:0];
[labelText setBackgroundColor:[UIColor clearColor]];
[labelText setTextColor:appDelegate.colorDarkText];
labelText.tag = 111;
[cell addSubview:labelText];
}
labelText = (UILabel*)[cell viewWithTag:111];
UIFont *cellFont = [UIFont fontWithName:#"Helvetica" size:15.0];
CGSize constraintSize = CGSizeMake(300.0f, MAXFLOAT);
CGSize labelSize = [self.sLocationText sizeWithFont:cellFont constrainedToSize:constraintSize lineBreakMode:UILineBreakModeWordWrap];
CGRect rect = CGRectMake(10, 10, labelSize.width, labelSize.height);
[labelText setText:self.sLocationText];
return cell;
Try this code, and see if it works out

Answer 2

You should use -[UITableViewDelegate willDisplayCell:forRowAtIndexPath:] delegate method.
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
TVC_Location_View_Text *cell = (TVC_Location_View_Text *) [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
UILabel* labelText;
if (cell == nil)
{
NSArray *topLevelObjects = [[NSBundle mainBundle] loadNibNamed:#"TVC_Location_View_Text" owner:nil options: nil];
for(id currentObject in topLevelObjects)
{
if([currentObject isKindOfClass:[UITableViewCell class]])
{
cell = ((TVC_Location_View_Text *) currentObject);
break;
}
}
labelText = [[UILabel alloc] initWithFrame:rect];
[labelText setFont:cellFont];
[labelText setLineBreakMode:UILineBreakModeWordWrap];
[labelText setNumberOfLines:0];
[labelText setBackgroundColor:[UIColor clearColor]];
[labelText setTextColor:appDelegate.colorDarkText];
labelText.tag = 111;
[cell addSubview:labelText];
}
return cell;
}
- (void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath
{
UILabel* labelText = (UILabel*)[cell viewWithTag:111];
UIFont *cellFont = [UIFont fontWithName:#"Helvetica" size:15.0];
CGSize constraintSize = CGSizeMake(300.0f, MAXFLOAT);
CGSize labelSize = [self.sLocationText sizeWithFont:cellFont constrainedToSize:constraintSize lineBreakMode:UILineBreakModeWordWrap];
CGRect rect = CGRectMake(10, 10, labelSize.width, labelSize.height);
[labelText setText:self.sLocationText];
}