Swift port of NSTextFieldCell subclass to vertically align text. Original code here: http://stackoverflow.com/questions/1235219/is-there-a-right-way-to-have-nstextfieldcell-draw-vertically-centered-text

VerticallyCenteredTextFieldCell.swift

// Makes the text in an NSTextFieldCell vertically centered. Works with single line, non-editable cells.
// Maybe doesn't work with others.
// Stolen from this stackoverflow question: 
// http://stackoverflow.com/questions/1235219/is-there-a-right-way-to-have-nstextfieldcell-draw-vertically-centered-text

import Cocoa

class VerticallyCenteredTextFieldCell: NSTextFieldCell {

	override func titleRect(forBounds rect: NSRect) -> NSRect {
		var titleFrame = super.titleRect(forBounds: rect)
		let titleSize = self.attributedStringValue.size()
		titleFrame.origin.y = rect.origin.y + (rect.size.height - titleSize.height) / 2.0
		return titleFrame
	}
	
	override func drawInterior(withFrame cellFrame: NSRect, in controlView: NSView) {
		let titleRect = self.titleRect(forBounds: cellFrame)
		self.attributedStringValue.draw(in: titleRect)
	}
	
}