Programmatically add a vertical slider to a ViewController and adjust for orientation changes

verticalSlider.swift

//
//  ViewController.swift
//
//  Created by Geoff Armstrong on 3/31/15.
//  Copyright (c) 2015 Geoff Armstrong. All rights reserved.
//

import UIKit

class ViewController: UIViewController {
    var slider: UISlider!
    
    //MARK: - Override functions
    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
		
		//Initialize slider as 0, then update once we have the frame properties.
        slider = UISlider(frame: CGRectZero)
        //Rotate to a vertical slider
        slider.transform = CGAffineTransformMakeRotation(CGFloat(-M_PI_2))
        slider.value = 0.5
        slider.addTarget(self, action: "sliderChanged:", forControlEvents: .ValueChanged)
        slider.continuous = false
        slider.hidden = true
    }
    
    override func viewWillAppear(animated: Bool) {
    	//Now that we have a frame, set the slider frame
        let xPos = view.frame.maxX - view.frame.width * 0.1
        let yPos = view.frame.minY + view.frame.height * 0.1
        let width = view.frame.width * 0.1
        let height = view.frame.height * 0.8
        let sliderFrame = CGRect(x: xPos, y: yPos, width: width, height: height)
        slider.frame = sliderFrame
        slider.hidden = false
    }

    //This is called after the rotation, thus it has the correct size
    override func viewWillLayoutSubviews() {
    	//Update the slider
        let xPos = view.frame.maxX - view.frame.width * 0.1
        let yPos = view.frame.minY + view.frame.height * 0.1
        let width = view.frame.width * 0.1
        let height = view.frame.height * 0.8
        let sliderFrame = CGRect(x: xPos, y: yPos, width: width, height: height)
        slider.frame = sliderFrame
    }

    func sliderChanged(sender: UISlider) {
        //Use the value from the slider for something
    }
    
}