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//
//  UserSingleton.swift
//  
//
//  Created by Jean-David Morgenstern-Peirolo on 7/30/18.
//

import Foundation

final class UserSingleton {

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class SyncOperation: Operation {
  override func main() {
    print("Executing")
  }
}
let operation = SyncOperation()
operation.start()
print("Done")
// Outputs "Executing" then "Done"

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class AsyncOperation: Operation {
  override func main() {
    DispatchQueue.global().async {
      print("Executing")
    }
  }
}
let operation = AsyncOperation()
operation.start()
print("Done")

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let syncOperation = SyncOperation()
let queue = OperationQueue()
queue.addOperation(syncOperation)
print("Done")
// May output "Executing" then "Done" or "Done" then "Executing"

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class AsyncOperation: Operation {
  // Only required when you want to manually start an operation
  // Ignored when an operation is added to a queue.
  override var isAsynchronous: Bool { return true }
  
  // This is not the OperationQueue!
  // This is the queue we use to read and write the operation state  in a safe thread way
  private let queue = DispatchQueue(label: "async_operation_private_queue", attributes: .concurrent)
  
  // State is accessed and modified in a thread safe and KVO   compliant way.

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let first = BlockOperation {
  print("First")
}
let second = BlockOperation {
  print("Second")
}
first.start()
second.start()
print("Done")
// Output:

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let syncOperation = SyncOperation()
let asyncOperation = AsyncOperation()
let queue = OperationQueue()
queue.addOperation(syncOperation)
queue.addOperation(asyncOperation)

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let syncOperation = SyncOperation()
let asyncOperation = AsyncOperation()
let queue = OperationQueue()
queue.addOperations([syncOperation, asyncOperation], waitUntilFinished: true)
print("Done")
// Outputs "Executing" twice then "Done"

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import UIKit

/// A UILabel subclass that responds to links tap.
public class LinkableLabel: UILabel {

    // MARK: - Private
    
    private var touchedLink: URL?
    
    @objc

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public class MyView {
    let imageView = UIImageView()
    
    func setImage() {
        let frameworkBundle = Bundle(identifier: "com.myframework")
        let image = UIImage(named: "my_image", in: frameworkBundle, with: nil)
        imageView.image = image
    }
}