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- import Foundation
- import UIKit
- struct Note {
- enum Importance: UInt {
- case unimportant = 0, normal, important
- }
- let uid: String
- var title: String
- var content: String
- var color: UIColor
- var importance: Importance
- var selfDestructDate: Date?
- init(uid: String = UUID().uuidString, title: String, content: String, color: UIColor = .white, importance: Importance, destructDate: Date? = nil) {
- self.uid = uid
- self.title = title
- self.content = content
- self.importance = importance
- self.color = color
- selfDestructDate = destructDate
- }
- }
- var a = Note(title: "Note 1", content: "Text 1", importance: .normal)
- var b = a
- DispatchQueue.global().async {
- a.color = .red
- a.title = "Note changed 1"
- a.content = "Text changed 1"
- a.importance = .important
- a.selfDestructDate = Date()
- DispatchQueue.main.async {
- sleep(2)
- print(">> a \(a)")
- }
- }
- DispatchQueue.global(qos: .utility).async {
- sleep(3)
- print(">> utility: b \(b)")
- }
- DispatchQueue.global(qos: .background).async {
- print(">> background: b \(b)")
- }
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