paskowski

import UIKit

class BlurImageOperation: Operation {

    var outputImage: UIImage?

    override func main() {
        guard let imageProvider = dependencies.first as? ImageProvider,
            let providedImage = imageProvider.providedImage else { return }

paskowski

blurImageOperation.completionBlock = {
            DispatchQueue.main.async {
                self.bluredImageImageView.image = blurImageOperation.outputImage
                self.bluringActivityIndicator.stopAnimating()
            }
        }

paskowski

import UIKit

class MonoImageOperation: Operation {

    var inputImage: UIImage?
    var outputImage: UIImage?

    init(inputImage: UIImage) {
        self.inputImage = inputImage
    }

paskowski

import UIKit

let printerOperation = BlockOperation()

printerOperation.addExecutionBlock { print("I") }
printerOperation.addExecutionBlock { print("am") }
printerOperation.addExecutionBlock { print("printing") }
printerOperation.addExecutionBlock { print("block") }
printerOperation.addExecutionBlock { print("operation") }

paskowski

import UIKit

class ViewController: UIViewController {

    @IBOutlet weak var imageView: UIImageView!

    override func viewDidLoad() {
        super.viewDidLoad()

        let image = UIImage(named: "image-1.jpg")

paskowski

import Foundation

class AsyncOperation: Operation {
    public enum State: String {
        case ready, executing, finished

        fileprivate var keyPath: String {
            return "is" + rawValue.capitalized
        }
    }

paskowski

extension AsyncOperation {

    override var isAsynchronous: Bool {
        return true
    }

    override var isExecuting: Bool {
        return state == .executing
    }

paskowski

import UIKit

class AsyncImageDownloadOperation: AsyncOperation {

    var downloadedImage: UIImage?

    override func main() {
        let defaultSession = URLSession(configuration: .default)
        guard let imgUrl = URL(string: "https://unsplash.com/photos/M9O6GRrEEDY/download?force=true") else { return }
        let dataTask = defaultSession.dataTask(with: imgUrl) { (data, response, error) in

paskowski

// Copyright (C) 2024 Gwendal Roué
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//