Comment puis-je ajouter UISegmentedControl par programmation dans swift 3.0?

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AJOUT D'UNE COMMANDE SEGMENTÉE PAR PROGRAMMATION

Mise à jour:

import UIKit
class ViewController: UIViewController {
/**
Loads the view and in our case we override default loadView to provide
custom SegmentedControl.
*/
override func loadView() {
super.loadView()
self.view.backgroundColor = UIColor.purpleColor()
println("Main view's loadView() called.")
//Initialize
      let items = ["Purple", "Green", "Blue"]
let customSC = UISegmentedControl(items: items)
customSC.selectedSegmentIndex = 0
//Set up Frame and SegmentedControl
      let frame = UIScreen.mainScreen().bounds
customSC.frame = CGRectMake(frame.minX + 10, frame.minY + 50,
frame.width - 20, frame.height*0.1)
//Style the Segmented Control
      customSC.layer.cornerRadius = 5.0  //Don't let background bleed
      customSC.backgroundColor = UIColor.blackColor()
customSC.tintColor = UIColor.whiteColor()
//Add target action method
      customSC.addTarget(self, action: "changeColor:", forControlEvents: .ValueChanged)
//Add this custom Segmented Control to our view
      self.view.addSubview(customSC)
}
/**
Handler for when custom Segmented Control changes and will change the
background color of the view depending on the selection.
*/
func changeColor(sender: UISegmentedControl) {
println("Change color handler is called.")
print("Changing Color to ")
switch sender.selectedSegmentIndex {
case 1:
self.view.backgroundColor = UIColor.greenColor()
println("Green")
case 2:
self.view.backgroundColor = UIColor.blueColor()
println("Blue")
default:
self.view.backgroundColor = UIColor.purpleColor()
println("Purple")
}
}
override func viewDidLoad() {
super.viewDidLoad()
//Do any additional setup after loading the view, typically from a nib.
  }
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
//Dispose of any resources that can be recreated.
  }
}

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