Toggle Button using setTitle()

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

class ViewController: UIViewController {

    @IBAction func myButton(sender: AnyObject) {

        

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

        {

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

        }

        else

        {

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

        }

    }

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Toggle Button in Android