vialyx

struct Segue {
    var identifier: String
}

extension UIViewController {
    
    func perform(segue: Segue, sender: Any? = nil) {
        performSegue(withIdentifier: segue.identifier, sender: sender)
    }
    

vialyx

if segue.identifier == "signup",
   let vc = segue.destination as? OBSignupViewController {
      vc.email = emailTF.text
}

vialyx

class ViewController: UIViewController {

    var model: Model = Model()

    override func loadView() {
        super.loadView()

        let button = UIButton(frame: CGRect(x: 60, y: 100, width: 200, height: 100))
        button.setTitle("Start Fitbit Auth", for: UIControl.State())
        button.backgroundColor = .red

vialyx

class Model: AuthHandlerType {

    var session: NSObject? = nil
    var contextProvider: AuthContextProvider?

    func auth(_ completion: @escaping ((String?, Error?) -> Void)) {
        guard let authUrl = Constants.authUrl else {
            completion(nil, nil)

            return

vialyx

struct Constants {

    static let authUrl = URL(string: "https://www.fitbit.com/oauth2/authorize")
    static let responseType = "code"
    static let clientId = "{YOUR_CLIENT_ID}"
    static let redirectScheme = "vialyx://" // YOU MUST DEFINE THAT SCHEME IN PROJECT SETTIGNS
    static let redirectUrl = "\(redirectScheme)fitbit/auth"
    static let scope = ["activity", "heartrate", "location", "nutrition", "profile", "settings", "sleep", "social", "weight"]
    static let expires = "604800"

vialyx

import SafariServices
import AuthenticationServices

typealias AuthHandlerCompletion = (URL?, Error?) -> Void

class AuthContextProvider: NSObject {

    private weak var anchor: ASPresentationAnchor!

    init(_ anchor: ASPresentationAnchor) {

vialyx

//
//  ViewController.swift
//  ActivityViewController
//
//  Created by Maksim Vialykh on 2019-02-21.
//  Copyright © 2019 Vialyx. All rights reserved.
//

import UIKit

vialyx

import UIKit

class AnimatedTabBarController: UITabBarController {

    override func viewDidLoad() {
        super.viewDidLoad()
        delegate = self
    }

}

vialyx

import UIKit

class AnimatableTableViewCell: UITableViewCell, HighlightAnimatable {
    
    var settings: HighlightAnimatableSettings {
        var settings = HighlightAnimatableSettings()
        settings.transform = .init(scaleX: 0.70, y: 0.70)
        settings.duration = 0.3
        return settings
    }

vialyx

import UIKit

class AnimatableButton: UIButton, HighlightAnimatable {

    override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
        super.touchesBegan(touches, with: event)
        highlight(true)
    }
    
    override func touchesEnded(_ touches: Set<UITouch>, with event: UIEvent?) {