UISwitch

UISwitch displays an on/off switch.

1. Open Xcode
2. Click File
3. Click New
4. Click Project...
5. Under iOS, click Application
6. Click Single View Application
7. Click Next
8. After Product Name, type your product name
9. After Organization Name, type your organization name or leave blank
10. After Organization Identifier, type your organization identifier
11. After Language, select Swift
12. After Devices, select Universal
13. Uncheck Use Core Data
14. Click Next
15. Select a folder
16. After Source Control, uncheck Create Git repository on
17. Click Create

1. Open ViewController.swift
2. Copy and paste code

1. Open Main.storyboard
2. Click View
3. Click Utilities
4. Click Show Object Library
5. Drag Switch to View
6. Click View
7. Click Utilities
8. Click Show Connections Inspector
9. Under Sent Events, after Value Changed, drag + to View Controller
10. Click valueChanged:
11. Under Referencing Outlets, after New Referencing Outlet, drag + to View Controller
12. Click interfaceBuilderSwitch

1. Click File
2. Click Add Files to "UISwitch" ...
3. Select image
4. After Destination, check Copy items into destination group's folder (if needed)
5. After Folders, select Create groups for any added folders
6. After Add to targets, check UISwitch
7. Click Add

1. Click Product
2. Click Run

import UIKit

class ViewController: UIViewController
{
    @IBOutlet weak var interfaceBuilderSwitch: UISwitch!
    
    override func prefersStatusBarHidden() -> Bool
    {
        return true
    }
    override func viewDidLoad()
    {
        super.viewDidLoad()
        
        let onSwitch = UISwitch()
        onSwitch.addTarget(self, action: "valueChanged:", forControlEvents: UIControlEvents.ValueChanged)
        onSwitch.on = true
        onSwitch.setTranslatesAutoresizingMaskIntoConstraints(false)
        self.view.addSubview(onSwitch)
        self.view.removeConstraints(self.view.constraints())
        self.view.addConstraint(NSLayoutConstraint(item: onSwitch, attribute: NSLayoutAttribute.Top, relatedBy: NSLayoutRelation.Equal, toItem: self.interfaceBuilderSwitch, attribute: NSLayoutAttribute.Bottom, multiplier: 1, constant: 0))

        let onAnimatedSwitch = UISwitch()
        onAnimatedSwitch.addTarget(self, action: "valueChanged:", forControlEvents: UIControlEvents.ValueChanged)
        onAnimatedSwitch.setOn(true, animated: true)
        onAnimatedSwitch.setTranslatesAutoresizingMaskIntoConstraints(false)
        self.view.addSubview(onAnimatedSwitch)
        self.view.addConstraint(NSLayoutConstraint(item: onAnimatedSwitch, attribute: NSLayoutAttribute.Top, relatedBy: NSLayoutRelation.Equal, toItem: onSwitch, attribute: NSLayoutAttribute.Bottom, multiplier: 1, constant: 0))

        let thumbTintColorSwitch = UISwitch()
        thumbTintColorSwitch.addTarget(self, action: "valueChanged:", forControlEvents: UIControlEvents.ValueChanged)
        thumbTintColorSwitch.setTranslatesAutoresizingMaskIntoConstraints(false)
        thumbTintColorSwitch.thumbTintColor = UIColor.redColor()
        self.view.addSubview(thumbTintColorSwitch)
        self.view.addConstraint(NSLayoutConstraint(item: thumbTintColorSwitch, attribute: NSLayoutAttribute.Top, relatedBy: NSLayoutRelation.Equal, toItem: onAnimatedSwitch, attribute: NSLayoutAttribute.Bottom, multiplier: 1, constant: 0))

        let tintColorSwitch = UISwitch()
        tintColorSwitch.addTarget(self, action: "valueChanged:", forControlEvents: UIControlEvents.ValueChanged)
        tintColorSwitch.setTranslatesAutoresizingMaskIntoConstraints(false)
        tintColorSwitch.tintColor = UIColor.redColor()
        self.view.addSubview(tintColorSwitch)
        self.view.addConstraint(NSLayoutConstraint(item: tintColorSwitch, attribute: NSLayoutAttribute.Top, relatedBy: NSLayoutRelation.Equal, toItem: thumbTintColorSwitch, attribute: NSLayoutAttribute.Bottom, multiplier: 1, constant: 0))

        let onTintColorSwitch = UISwitch()
        onTintColorSwitch.addTarget(self, action: "valueChanged:", forControlEvents: UIControlEvents.ValueChanged)
        onTintColorSwitch.on = true
        onTintColorSwitch.onTintColor = UIColor.redColor()
        onTintColorSwitch.setTranslatesAutoresizingMaskIntoConstraints(false)
        self.view.addSubview(onTintColorSwitch)
        self.view.addConstraint(NSLayoutConstraint(item: onTintColorSwitch, attribute: NSLayoutAttribute.Top, relatedBy: NSLayoutRelation.Equal, toItem: tintColorSwitch, attribute: NSLayoutAttribute.Bottom, multiplier: 1, constant: 0))

        /*
        let offImageSwitch = UISwitch()
        offImageSwitch.addTarget(self, action: "valueChanged:", forControlEvents: UIControlEvents.ValueChanged)
        offImageSwitch.offImage = UIImage(named: "HappyFace") // no effect as of iOS7
        offImageSwitch.setTranslatesAutoresizingMaskIntoConstraints(false)
        self.view.addSubview(offImageSwitch)
        self.view.addConstraint(NSLayoutConstraint(item: offImageSwitch, attribute: NSLayoutAttribute.Top, relatedBy: NSLayoutRelation.Equal, toItem: onTintColorSwitch, attribute: NSLayoutAttribute.Bottom, multiplier: 1, constant: 0))

        let onImageSwitch = UISwitch()
        onImageSwitch.addTarget(self, action: "valueChanged:", forControlEvents: UIControlEvents.ValueChanged)
        onImageSwitch.on = true
        onImageSwitch.onImage = UIImage(named: "HappyFace") // no effect as of iOS7
        onImageSwitch.setTranslatesAutoresizingMaskIntoConstraints(false)
        self.view.addSubview(onImageSwitch)
        self.view.addConstraint(NSLayoutConstraint(item: onImageSwitch, attribute: NSLayoutAttribute.Top, relatedBy: NSLayoutRelation.Equal, toItem: offImageSwitch, attribute: NSLayoutAttribute.Bottom, multiplier: 1, constant: 0))
        */
    }
    @IBAction func valueChanged(sender: UISwitch!)
    {
        var string = "false"
        
        if (sender.on)
        {
            string = "true"
        }
        
        //let alertView = UIAlertView(title: string, message: nil, delegate: nil, cancelButtonTitle: "Cancel")
        //alertView.show()
        
        let alertController = UIAlertController(title: string, message: nil, preferredStyle: UIAlertControllerStyle.Alert)
        alertController.addAction(UIAlertAction(title: "Cancel", style: UIAlertActionStyle.Cancel, handler: nil))
        self.presentViewController(alertController, animated: true, completion: nil)

    }
}

Apple UIKit