OksanaFedorchuk

extension Date {
    
    func daysBetweenDates(start: Date, end: Date) -> Int {
        let days = Calendar.current.dateComponents([.day], from: start, to: end).day!
        let returnDays = days+1
        return returnDays
    }
    
    func secondsBetweenDates(start: Date, end: Date) -> Int {
        let seconds = Calendar.current.dateComponents([.second], from: start, to: end).second!

OksanaFedorchuk

import UIKit

protocol StoryboardIdentifiable {
    static var storyboardIdentifier: String { get }
}

extension StoryboardIdentifiable where Self: UIViewController {
    static var storyboardIdentifier: String {
        return String(describing: self)
    }

OksanaFedorchuk

extension UIView {
    //adding subview to a view, animated
    func animateIn(view: UIView) {
        self.backgroundColor = .clear
        self.addSubview(view)
        view.transform = CGAffineTransform(scaleX: 1.2, y: 1.2)
        view.alpha = 0
        
        UIView.animate(withDuration: 0.3) {
            view.transform = CGAffineTransform(scaleX: 1.0, y: 1.0)

OksanaFedorchuk

import UIKit

class ProgressBar: UIView {
    
    // MARK: -  Properties
    
    @IBInspectable var color: UIColor = .gray {
        didSet { setNeedsDisplay() }
    }