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I'm developing an NSTableView (cell based) app based in Xcode5 and I want to get each NSTextFieldCell's cell for determining row's height this is my code so far

- (CGFloat)tableView:(NSTableView *)tableView heightOfRow:(NSInteger)row{

    if (tableView == _tableView) {

        NSTableColumn *column = [_tableView tableColumnWithIdentifier:@"Consecutivo"];
        NSTextFieldCell *cell = [column dataCellForRow:row];



        NSInteger occurences = [Functions FindOccurencesOfText:@"\n"
                                              inWholeText:cell.stringValue];

        if (occurences > 0) { return occurences * 17; }
        else { return 17; }

    }
    else                         { return 17; }
}

but I cant get string's cell value

even if I put 

NSLog(@"text: %@", cell.stringValue);

all I get is

text:

any help I'll appreciate

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