Dynamically add objects to UITableView cell

Question

![enter image description here][2]I have a table view,in which I am using my custom cell that contains user's profile picture,status label, time stamp label, username label, no of comments label and a comment button. When no of comments i.e"4 comments" is tapped, I ha ve to show comments in the corresponding cell along with username, user profile picture etc below the original post. How do I dynamically add these objects into cell when the app is running? or there is some else solution please tell. table for 2 posts is shown in right of image. Tapping no of comments left of the image should be shown. Here is the code for table cell:

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {



    static NSString *CellIdentifier = @"MyCell";
    TableCell *cell = (TableCell *) [tableView dequeueReusableCellWithIdentifier:CellIdentifier];

    if (cell == nil) {
        NSArray* topLevelObjects = [[NSBundle mainBundle] loadNibNamed:@"TableCell" owner:self   options:nil];
        for (id currentObject in topLevelObjects) {
            if ([currentObject isKindOfClass:[UITableViewCell class]]) {
                cell = (TableCell *)currentObject;
                break;
            }
        }
    }

    // Configure the cell.
    User *user = [postTableData objectAtIndex:indexPath.row];
    NSLog(@"pic:%@",user.profilePictureURL);
    cell.profilePicture.image = [UIImage imageNamed:@"avatar.png"];
    cell.profilePicture.layer.cornerRadius = cell.profilePicture.frame.size.height /2;
    cell.profilePicture.layer.masksToBounds = YES;
    cell.profilePicture.layer.borderWidth = 0;

    cell.userName.text = user.name;
    cell.status.text = user.status;
    cell.dateForStatus.text = user.datePosted;
    [cell.countComments setTitle:user.countOfComments forState:UIControlStateNormal];
    cell.selectionStyle = UITableViewCellSelectionStyleNone;
    [cell.contentView.layer setBorderWidth:6.0f];
    [cell.contentView.layer setBorderColor:[[UIColor alloc] initWithRed:233/255.0 green:236/255.0 blue:233/255.0 alpha:1.0].CGColor];
    cell.commentButton.tag=indexPath.row;
    [cell.commentButton addTarget:self action:@selector(commentButtonPressAction:) forControlEvents:UIControlEventTouchUpInside];
    return cell;
    ![enter image description here][3]}

see this link to know about custom cell appcoda.com/customize-table-view-cells-for-uitableview It will help you. — Mani
– Mani, Commented Mar 12, 2014 at 8:46

Horst · Accepted Answer · 2014-03-12 09:05:01Z

1

I guess you are trying to expand the cell.

You can call these few lines to update the cell, including the height.

[tableView beginUpdates];
[tableView reloadRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationAutomatic];
[tableView endUpdates];

So just set a flag to show comments in cellForRowAtIndexPath.

//AFTER_YOUR_SETTING
if(showComment){
    [cell loadCommentMethod];
}

And also, in heightForRowAtIndexPath

if(showComment){
    return [CellClass publicMethodForCalHeight:dataAtIndexPath];
} else {
    return kDefaultCellHeight;
}

answered Mar 12, 2014 at 9:05

Horst

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2 Comments

Ali Hassan Over a year ago

this one looks closer,

Ali Hassan Over a year ago

how do i get indexpath?? I have indexpath.row

Avt · Accepted Answer · 2014-03-12 09:26:01Z

1

Change your button action method:

- (void)onButtonTaped:(id)sender
{
    UIButton *button = sender;
    UILabel *newLabel = [ [ UILabel alloc] initWithFrame:CGRectMake (0, 100, 200, 50)];
    newLabel.text = @"Your new text here";
    [button.superview addSubview:newLabel];
}

But label will be visible only until cell will be visible on screen. When cell will be recreated label will be deleted. To keep label you still need to change

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath

edited Mar 12, 2014 at 9:26

answered Mar 12, 2014 at 8:51

Avt

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1 Comment

Ali Hassan Over a year ago

This method is called when the tableview is loaded first time, not when label inside the table cell is tapped.

Andrey Chernukha · Accepted Answer · 2014-03-12 09:31:26Z

1

I'm not sure if it works but you can try this. Override touchesBegan: on your cell:

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
     UITouch *touch = [touches anyObject];
     CGPoint point = [touch locationInView:self];    
     CGRect rect = [noComments frame];

     if (CGRectContainsPoint(rect, point))
     {
        UILabel *label = ... // the label you need to add.
       [self addSubview:label];
     }
}

edited Mar 12, 2014 at 9:31

answered Mar 12, 2014 at 8:48

Andrey Chernukha

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3 Comments

Ali Hassan Over a year ago

This one is a little fine. Problem is, it adds object when whole cell is tapped from any where in the cell.

Andrey Chernukha Over a year ago

@AliHassan you need to add objects when a certain area in the cell is tapped?

Ali Hassan Over a year ago

yup,when no of comments is tapped

Adithya · Accepted Answer · 2014-03-12 08:53:00Z

0

You can make use of the method insertRowsAtIndexPaths:withRowAnimation: of the UITableView. You can refer this link for a tutorial. Also refer the Apple docs

answered Mar 12, 2014 at 8:53

Adithya

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2 Comments

Ali Hassan Over a year ago

This will add new cell. I need to objects in the cell. is this possible?

Adithya Over a year ago

Actually I would suggest, instead of adding objects (I'm not sure what objects you are referring to) add cells itself. Create a new custom cell and insert cells as many comments you have. You can also provide decent animation during the show/hide comment process which are readily available in the form of UITableViewRowAnimations

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