Set height of UITableView which contain dynamic Cell Height

sohan vanani Published at Dev

sohan vanani

I have taken UITableView into UIScrollView now I want to set static height to tabelview and set contentSize to ScrollView because UITableView calling cellForRowAtIndexPath every time when I scroll tableview.

I am setting tableviewcell size dynamically using below code.

Now question is: How and where i can set total height to tableview and content size to my scrollview?

-(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
    NSMutableDictionary *itemDataDic = [resultArray objectAtIndex:indexPath.row];
    UIFont *cellFont = [UIFont fontWithName:@"Helvetica" size:15.0];
    CGSize constraintSize = CGSizeMake(275.0f, MAXFLOAT);
    CGSize labelSize = [[itemDataDic objectForKey:@"offer_title"] sizeWithFont:cellFont constrainedToSize:constraintSize lineBreakMode:NSLineBreakByWordWrapping];

    if (labelSize.height > 30.00f)
    {
        totalHeight = totalHeight + 325;
        return 325;
    }
    else
    {
        totalHeight = totalHeight + 306;
        return 306;
    }
}

Tuncer Tırnavalı

'heightForRowAtIndexPath' is called many times for a cell, therefore, totalHeight is calculated wrong in this way.

You need to calculate the height of your table on init and when the data has been changed.

-(void) reloadAndResizeTable
{
    CGFloat totalHeight = .0f;
    for (NSMutableDictionary* itemDataDic in resultArray) {
        UIFont *cellFont = [UIFont fontWithName:@"Helvetica" size:15.0];
        CGSize constraintSize = CGSizeMake(275.0f, MAXFLOAT);
        CGSize labelSize = [[itemDataDic objectForKey:@"offer_title"] sizeWithFont:cellFont constrainedToSize:constraintSize lineBreakMode:NSLineBreakByWordWrapping];

        if (labelSize.height > 30.00f)
        {
            totalHeight = totalHeight + 325.0f;
            return 325;
        }
        else
        {
            totalHeight = totalHeight + 306.0f;
            return 306;
        }
    }
    CGRect frame = [yourTableView frame];
    [yourTableView setFrame:CGRectMake(frame.origin.x, frame.origin.y, frame.size.width, totalHeight)];
    [yourTableView reloadData];
}

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