setScrollable not working for NSTextFieldCell

I want my each table cell to be scrollable since its editable.I am using

        self.nsChildTextFi开发者_StackOverflow中文版eldObj = [[NSTextFieldCell alloc] init];
        [self.nsChildTextFieldObj setControlView:self.controlView];
        [self.nsChildTextFieldObj setBackgroundStyle:self.backgroundStyle];
        [self.nsChildTextFieldObj setScrollable:YES];
        [self.nsChildTextFieldObj setFont:[NSFont fontWithName:appDelegate.selectedFont size:appDelegate.selectedFontSize]];
        [self.nsChildTextFieldObj setEditable:NO];

but my table view cell is not scrolling .Please help!

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I think you can make use of sizeWithFont method.

Use it with every keypress or upon paste and change the height of self.nsChildTextFieldObj dynamically.