FirstViewController.swift

//
//  FirstViewController.swift
//  TransitionButton
//
//  Created by Alaeddine M. on 11/1/15.
//  Copyright (c) 2015 Alaeddine M. All rights reserved.
//

import UIKit
import TransitionButton  // 1: First import the TransitionButton library

class FirstViewController: UIViewController {

    @IBAction func buttonAction(_ button: TransitionButton) {
        button.startAnimation() // 2: Then start the animation when the user tap the button
        button.finishAnimationDuration = 0.6
        let qualityOfServiceClass = DispatchQoS.QoSClass.background
        let backgroundQueue = DispatchQueue.global(qos: qualityOfServiceClass)
        backgroundQueue.async(execute: {

            sleep(3) // 3: Do your networking task or background work here.

            DispatchQueue.main.async(execute: { () -> Void in
                // 4: Stop the animation, here you have three options for the `animationStyle` property:
                // .expand: useful when the task has been compeletd successfully and you want to expand the button and transit to another view controller in the completion callback
                // .shake: when you want to reflect to the user that the task did not complete successfly
                // .normal
                button.stopAnimation(animationStyle: .expand, completion: {
                    let secondVC = SecondViewController()
                    self.present(secondVC, animated: true, completion: nil)
                })
            })
        })
    }
}