WIP and has a bug

adjust-insets-for-keyboard.swift

// ...

override func viewDidLoad()
{
	super.viewDidLoad()

	// Thanks http://stackoverflow.com/a/27665207
	NSNotificationCenter.defaultCenter().addObserverForName(
		UIKeyboardWillChangeFrameNotification,
		object: nil,
		queue: nil,
		usingBlock: { notification in
			let userInfo = notification.userInfo!
			let animationDuration = userInfo[UIKeyboardAnimationDurationUserInfoKey]!.doubleValue
			let animationCurve = userInfo[UIKeyboardAnimationCurveUserInfoKey]!.unsignedIntValue

			let frameEnd = userInfo[UIKeyboardFrameEndUserInfoKey]!.CGRectValue()
			let convertedFrameEnd = self.view.convertRect(frameEnd, fromView: nil)
			let keyboardChopsBottom = max(0, self.view.frame.height - convertedFrameEnd.origin.y)

			println("keyboard covers bottom \(keyboardChopsBottom) of view")

			UIView.animateWithDuration(
				animationDuration,
				delay: 0,
				options: UIViewAnimationOptions(UInt(animationCurve)),
				animations: {
					self.view.layoutIfNeeded()
				},
				completion: nil
			)
		}
	)
}

override func viewWillDisappear(animated: Bool)
{
	super.viewWillDisappear(animated)

	NSNotificationCenter.defaultCenter().removeObserver(self)
}

// ...