cell height depending on a label text

Question

I get the object from CoreData like this self.name = [[abc anyObject] valueForKey:@"name"] and display it:

cell.nameLabel.text = [NSString stringWithFormat:@"%@",self.name];
cell.nameLabel.numberOfLines = 0;
cell.nameLabel.lineBreakMode = NSLineBreakByWordWrapping;

How can I get the correct height for my cell to return it in - (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath;

score 2 · Accepted Answer · answered May 29 '14 at 15:02

This is the solution:

- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
    CGSize constraintSize = CGSizeMake(286.0f, CGFLOAT_MAX);
    UIFont *theFont  = [UIFont systemFontOfSize:14.0f];
    CGSize theSize;

    if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 7.0)
    {
        CGRect frame = [[self.mArray objectAtIndex:indexPath.row] boundingRectWithSize:constraintSize options:(NSStringDrawingUsesLineFragmentOrigin | NSStringDrawingUsesFontLeading) attributes:@{NSFontAttributeName:theFont} context:nil];
    theSize = frame.size;
    }
    else
    {
        theSize = [[self.mArray objectAtIndex:indexPath.row] sizeWithFont:theFont constrainedToSize:constraintSize lineBreakMode:NSLineBreakByWordWrapping];
    }

    return theSize.height;
    }

Also in - (UITableViewCell )tableView:(UITableView )tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath I used cell.label.numberOfLines = 0

If you are using more than one Label in row - in CGSizeMake(286.0f, CGFLOAT_MAX) use lower value than 286.0f (for example 150.0f)

score 1 · Answer 2 · edited May 28 '14 at 15:27

1

Just implement a static method in your UITableViewCell class that is able to calculate cell height basing on provided string and a width. Cell should know how it is constructed and how much space it will occupy.

For example:

+ (CGFloat)heightForWidth:(CGFloat)width text:(NSString *)text {

    CGFloat height = ... ;

    return height;
}

edited May 28 '14 at 15:27

Fogmeister

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answered May 28 '14 at 15:25

verges

21
2

I didn't understand it. I Have my own class for cell, and how I get 'CGFloat height = '? – davel May 28 '14 at 15:32
You accidentally the whole interesting part. – Matthias Bauch May 28 '14 at 17:28
If your cell contains only one multiline label this method would looke sth like this (just use the same label font and line breaking mode that you use for your label:`+ (CGFloat)cellHeightForTitle:(NSString *)title width:(CGFloat)width { CGFloat height = 0.0; height += 2 * verticalMargin; height += [title sizeWithFont:font constrainedToSize:CGSizeMake(width - 2*sideMargin, MAXFLOAT) lineBreakMode:lineBreakMode].height; return height; }` – verges May 29 '14 at 12:02

score 0 · Answer 3 · answered May 28 '14 at 19:02

Try to disable auto layout in your storyboard and then call sizeToFit.

cell.nameLabel.text = [NSString stringWithFormat:@"%@",self.name];
cell.nameLabel.numberOfLines = 0;
cell.nameLabel.lineBreakMode = NSLineBreakByWordWrapping;
[cell.nameLabel sizeToFit];

cell height depending on a label text

3 Answers3