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;
}