AVCaptureTorchMode - Flashlight / Torch function

1. Drag a button to the storyboard. Make the text as "OFF".

2. Control-drag the button to ViewController.swift and make it an IBAction:

    @IBAction func myButton(sender: AnyObject) {

    }

3. Complete the code as below:

import UIKit

import AVFoundation

class ViewController: UIViewController {

    @IBAction func myButton(sender: AnyObject) {

        

        let myDevice = AVCaptureDevice.defaultDeviceWithMediaType(AVMediaTypeVideo)

        

        if (myDevice.hasTorch) {

            myDevice.lockForConfiguration(nil)

            if (sender.titleLabel!?.text == "ON")

            {

                myDevice.torchMode = AVCaptureTorchMode.Off

                sender.setTitle("OFF", forState:  UIControlState.Normal);

            }

            else

            {

                myDevice.torchMode = AVCaptureTorchMode.On

                sender.setTitle("ON", forState:  UIControlState.Normal);

            }

            myDevice.unlockForConfiguration()

        } else {

            let alertView = UIAlertView()

            alertView.message = "No Flash Detected!"

            alertView.addButtonWithTitle("OK")

            alertView.show()

        }

    }

    override func viewDidLoad() {

        super.viewDidLoad()

        // Do any additional setup after loading the view, typically from a nib.

    }

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Flashlight / Torch in Android