Trouble figuring out the UITableViewCell multiline ability - iphone

Question

Got pretty far with this one but am hanging on the part where I read out the string information.
I made a cell that receives data from an external xml file, it all works fine but some cell contain to much text which I want to display over multiple lines. Also no problem. But the tricky part is the dynamic height of my cell. I configured this in the heightForRowAtIndexPath: method, but I need to know the amount of text(rows) the cell contains, and I am stuck on the part how to connect that to my cellText(string) variable.
Any help would be welcome :-)
Here is my code:
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"CellIdentifier";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil)
{
cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleValue2 reuseIdentifier:CellIdentifier] autorelease];
cell.selectionStyle = UITableViewCellSelectionStyleBlue;
}
// Set the text in the cell for the section/row.
NSString *endDate = [XMLParser stringFromDate:[XMLParser dateFromString:stage.end]];
int endDateLength = endDate.length;
NSString *endTime = [NSString stringWithFormat:#"%#", [endDate substringFromIndex:endDateLength -7]];
NSString *startDate = [XMLParser stringFromDate:[XMLParser dateFromString:stage.start]];
int startDateLength = startDate.length;
NSString *startTime = [NSString stringWithFormat:#"%#", [startDate substringFromIndex:startDateLength -7]];
NSString *date = [XMLParser stringFromDate:[XMLParser dateFromString:stage.start]];
int dateLength = date.length;
NSString *dateString = [NSString stringWithFormat:#"%#", [date substringToIndex:dateLength -7]];
NSString *cellText = nil;
NSString *cellExplainText = nil;
//Pre title arrays
dateTitleArray = [[NSArray alloc] initWithObjects:#"Dag", #"Start tijd", #"Eind tijd", nil];
nameTitleArray = [[NSArray alloc] initWithObjects:#"Naam", #"Graad",nil];
addressTitleArray = [[NSArray alloc] initWithObjects:#"Dojo", #"Straat", #"Plaats",nil];
infoTitleArray = [[NSArray alloc] initWithObjects:#"Kosten", #"Contact", #"Details", nil];
dateArray = [[NSArray alloc] initWithObjects: dateString, startTime, endTime, nil];
nameArray = [[NSArray alloc] initWithObjects: stage.teacher, stage.grade, nil];
addressArray = [[NSArray alloc] initWithObjects: stage.dojo, stage.street, stage.city, nil];
infoArray = [[NSArray alloc] initWithObjects: stage.cost, stage.contact, stage.details, nil];
switch (indexPath.section)
{
case 0:
cellExplainText = [dateTitleArray objectAtIndex:indexPath.row];
cellText = [dateArray objectAtIndex:indexPath.row];
break;
case 1:
cellExplainText = [nameTitleArray objectAtIndex:indexPath.row];
cellText = [nameArray objectAtIndex:indexPath.row];
break;
case 2:
cellExplainText = [addressTitleArray objectAtIndex:indexPath.row];
cellText = [addressArray objectAtIndex:indexPath.row];
break;
case 3:
cellExplainText = [infoTitleArray objectAtIndex:indexPath.row];
cellText = [infoArray objectAtIndex:indexPath.row];
break;
default:
break;
}
[dateTitleArray release];
[nameTitleArray release];
[addressTitleArray release];
[infoTitleArray release];
[dateArray release];
[nameArray release];
[addressArray release];
[infoArray release];
cell.textLabel.text = cellExplainText;
cell.detailTextLabel.text = cellText;
cell.detailTextLabel.lineBreakMode = UILineBreakModeWordWrap;
cell.detailTextLabel.numberOfLines = 0;
cell.detailTextLabel.font = [UIFont fontWithName:#"Helvetica" size:14.0];
return cell;
}
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
NSString *cellTextSize = ????????????;
UIFont *cellFont = [UIFont fontWithName:#"Helvetica" size:14.0];
CGSize constraintSize = CGSizeMake(280.0f, MAXFLOAT);
CGSize labelSize = [cellTextSize sizeWithFont:cellFont constrainedToSize:constraintSize lineBreakMode:UILineBreakModeWordWrap];
return labelSize.height + 12;
}

Answer 1

- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath{
CGSize maxSize = CGSizeMake(urMaxSize);
CGSize cellSize = [itemName sizeWithFont:[UIFont systemFontOfSize:15]
constrainedToSize:maxSize lineBreakMode:UILineBreakModeWordWrap];
return cellSize.height;
}
itemName is the text u want to fill it with. I guess it is [infoTitleArray objectAtIndex:indexPath.row] and corresponding array information based on index. You can get the section also in this method so you can get the string.
If you want to use your method
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
NSString *cellText;
switch (indexPath.section)
{
case 0:
cellText = [dateTitleArray objectAtIndex:indexPath.row];
break;
case 1:
cellText = [nameTitleArray objectAtIndex:indexPath.row];
break;
case 2:
cellText = [addressTitleArray objectAtIndex:indexPath.row];
break;
case 3:
cellText = [infoTitleArray objectAtIndex:indexPath.row];
break;
default:
break;
}
UIFont *cellFont = [UIFont fontWithName:#"Helvetica" size:14.0];
CGSize constraintSize = CGSizeMake(280.0f, MAXFLOAT);
CGSize labelSize = [cellText sizeWithFont:cellFont constrainedToSize:constraintSize lineBreakMode:UILineBreakModeWordWrap];
return labelSize.height + 12;
}

Answer 2

I would suggest you to store in an array your cellText/cellTextExplained values, so that in heightForRowAtIndexPath: you can retrieve them:
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath*)indexPath
{
NSString *cellText = [self.cellTextArray:objectAtIndex:indexPath.row];
//-- rest of your code here
UIFont *cellFont = [UIFont fontWithName:#"Helvetica" size:14.0];
CGSize constraintSize = CGSizeMake(280.0f, MAXFLOAT);
CGSize labelSize = [cellTextSize sizeWithFont:cellFont constrainedToSize:constraintSize lineBreakMode:UILineBreakModeWordWrap];
return labelSize.height + 12;
}