iOS - UILabel inside tableview cell - iphone

Question

I'm very much new to iphone development and strucked at a point. Actually my need is I'm displaying some results in a UITableView and I'm displaying then UILables of UITableView's cell..
How can I make the UILabel's to adjust the content according to the text. Actually text is not static .It may be changing at run time.So I need to set dynamic size to a UILabel .Ans secondly suppose if the text is null then it should not show any space and immediately the next UILabel should start .How can I make it possible ?
Here is my code..
self.tableView=[[UITableView alloc] initWithFrame:CGRectMake(0,150,320,800) style:UITableViewStylePlain];
self.tableView.delegate=self;
self.tableView.dataSource=self;
self.tableView.scrollEnabled = NO;
[self.view addSubview:self.tableView];
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
if(currentHtmlElement==#"3")
{
static NSString *CellIdentifier=#"Cell";
UITableViewCell* cell=[tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if(cell == nil)
{
cell = [[[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier]autorelease];
}
NSMutableDictionary *d = (NSMutableDictionary *) [arr2 objectAtIndex:indexPath.row];
cell.accessoryType= UITableViewCellAccessoryDetailDisclosureButton;
UILabel *name1= [[UILabel alloc]initWithFrame:CGRectMake(10, 5, 320, 40)];
name1.font=[UIFont boldSystemFontOfSize:16];
[name1 setTextAlignment:UITextAlignmentLeft];
[name1 setText:[d valueForKey:#"Name"]];
name1.tag = 111;
[cell addSubview:name1];
[name1 release];
UILabel *codetype=[[UILabel alloc]initWithFrame:CGRectMake(10, 45, 320,15)];
codetype .font=[UIFont boldSystemFontOfSize:12];
[codetype setTextAlignment:UITextAlignmentLeft];
[codetype setText:[d valueForKey:#"Code"]];
codetype.tag=112;
[cell addSubview:codetype];
[codetype release];
UILabel *id=[[UILabel alloc]initWithFrame:CGRectMake(10, 68, 320,10)];
id .font=[UIFont fontWithName:#"arial" size:12];
[id setTextAlignment:UITextAlignmentLeft];
[id setText:[d valueForKey:#"ID"]];
id.tag=113;
[cell id ];
[id release];
UILabel *address=[[UILabel alloc]initWithFrame:CGRectMake(10, 85, 320,10)];
address .font=[UIFont fontWithName:#"arial" size:12];
[address setTextAlignment:UITextAlignmentLeft];
[address setText:[d valueForKey:#"address"]];
line2.tag=114;
[cell addSubview: address];
[address release];
UILabel *city = [[UILabel alloc]initWithFrame:CGRectMake(10, 105, 320, 10)];
city .font=[UIFont fontWithName:#"arial" size:12];
[city setTextAlignment:UITextAlignmentLeft];
[city setText:[d valueForKey:#"City"]];
city.tag=115;
[cell addSubview:city ];
[city release];
}
Here I have set all the UILabels to static size.But what I need is dynamic size.and suppose if the address label is null then it should not show any space and next label i.e city should start immediately next after id ..How is it possible?

Answer 1

I did this task in my code.... you can use this code and do changes according to your code....and let me know if you get any problem.
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath;
{
NSMutableDictionary *dicNotification =[[NSMutableDictionary alloc]initWithDictionary: [myNotification objectAtIndex:indexPath.row]];
//code to get notification text height
NSString *text = [dicNotification objectForKey:#"message"];
CGSize constraint = CGSizeMake(175, 100.0f);
CGSize size = [text sizeWithFont: [UIFont fontWithName:#"Verdana" size:12] constrainedToSize:constraint lineBreakMode:UILineBreakModeWordWrap];
return size.height;
}
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil)
{
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier];
//label for message
UILabel *lblMsg = [[UILabel alloc] initWithFrame:CGRectZero];
lblMsg.tag = 12;
lblMsg.backgroundColor = [UIColor clearColor];
[lblMsg setFont:[UIFont fontWithName:#"Verdana" size:12]];
[lblMsg setLineBreakMode:UILineBreakModeWordWrap];
[cell addSubview:lblMsg];
}
NSMutableDictionary *dicNotification =[[NSMutableDictionary alloc]initWithDictionary: [myNotification objectAtIndex:indexPath.row]];
//get the message height set frame height to imageView(BubbleMid & Top) & labelMSG
NSString *txt = [dicNotification objectForKey:#"message"];
CGSize constraint = CGSizeMake(175, 2000.0f);
CGSize size = [txt sizeWithFont: [UIFont fontWithName:#"Verdana" size:12] constrainedToSize:constraint lineBreakMode:UILineBreakModeWordWrap];
//set frame height to labelMsg
UILabel *lblMsg = (UILabel *)[cell viewWithTag:12];
lblMsg.frame = CGRectMake(15,25, 175, size.height);
[lblMsg setNumberOfLines:size.height/16];
//set labelMsg text
lblMsg.text = [dicNotification objectForKey:#"message"];
return cell;
}

Answer 2

The thing is that you must use heightForRowAtIndexPath. The problem is that it is called prior to cellForRowAtIndexPath, therefore the text is not in the component and you can not simply adjust the component size to the text. So, what you do is calculate the text size using a sizeWithFont.
In case of normal/standard text
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
//here you get your text string
NSString* theText = ... ;
//then calculate the size. systemFontOfSize depends on your font size
//yourLabelWidth must be known and usually depends on scree size or if the tableview has an index
CGSize textSize = [theText sizeWithFont:[UIFont systemFontOfSize:14] constrainedToSize:CGSizeMake(yourLabelWidth, MAXFLOAT) lineBreakMode:NSLineBreakByWordWrapping];
return textSize.height;
}
In the case of attributed text
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
//here you get your text string
NSAttributedString* theText = ...;
//then calculate the size.
//yourLabelWidth must be known and usually depends on scree size or if the tableview has an index
CGRect rectSize = [theText boundingRectWithSize:CGSizeMake(yourLabelWidth, MAXFLOAT) options:NSStringDrawingUsesLineFragmentOrigin context:NULL];
return rectSize.size.height;
return textSize.height;
}

Answer 3

you can make UILable adjust content with bellow code
CGSize sizeToMakeLabel = [name1.text sizeWithFont: name1.font];
name1.frame = CGRectMake(name1.frame.origin.x, name1.frame.origin.y,
sizeToMakeLabel.width, sizeToMakeLabel.height);
and here set second lable like bellow..
UPDATE
if([[d valueForKey:#"address"] isEquelToString:#""]){
UILabel *city=[[UILabel alloc]initWithFrame:CGRectMake(10, idLable.frame.origin.y + id.frame.size.height+10 , 320,15)];
city .font=[UIFont fontWithName:#"arial" size:12];
[city setTextAlignment:UITextAlignmentLeft];
[city setText:[d valueForKey:#"City"]];
city.tag=115;
[cell addSubview:city ];
CGSize sizeToMakeLabel = [city.text sizeWithFont: city.font];
city.frame = CGRectMake(city.frame.origin.x, city.frame.origin.y,
sizeToMakeLabel.width, sizeToMakeLabel.height);
}
else{
UILabel * address =[[UILabel alloc]initWithFrame:CGRectMake(10, idLable.frame.origin.y + id.frame.size.height+10 , 320,15)];
address .font=[UIFont fontWithName:#"arial" size:12];
[address setTextAlignment:UITextAlignmentLeft];
[address setText:[d valueForKey:#"address"]];
line2.tag=114;
[cell addSubview: address];
CGSize sizeToMakeLabel = [address.text sizeWithFont: address.font];
address.frame = CGRectMake(address.frame.origin.x, address.frame.origin.y,
sizeToMakeLabel.width, sizeToMakeLabel.height);
}
and so on for every label..
follow this logic for whole label
i hope this help you...