codeactual

class ViewController: UIViewController {
    override func viewDidLoad() {
        super.viewDidLoad()
        
        Task {
            // 1️⃣❓ UIViewController is in a MainActor context, so this Task
            // will inherit that, so the following pretend expensive call will
            // be on the main thread and likely block?
            ExpensiveOperationPerformer.doExpensiveLoopAndPrint()
        }

codeactual

ANSI Escape Sequences

Standard escape codes are prefixed with Escape:

• Ctrl-Key: ^[
• Octal: \033
• Unicode: \u001b
• Hexadecimal: \x1B
• Decimal: 27

codeactual

Author: https://www.cyanhall.com/

1. The Layer Tree

Core Animation's original name is Layer Kit

Core Animation is a compositing engine; its job is to compose different pieces of visual content on the screen, and to do so as fast as possible. The content in question is divided into individual layers stored in a hierarchy known as the layer tree. This tree forms the underpinning for all of UIKit, and for everything that you see on the screen in an iOS application.

In UIView, tasks such as rendering, layout and animation are all managed by a Core Animation class called CALayer. The only major feature of UIView that isn’t handled by CALayer is user interaction.

There are four hierarchies, each performing a different role:

codeactual

//
//  TaggerView.swift
//
//  Created by Alex Hay on 21/11/2020.
//
// Simple interface for adding tags to an array in SwiftUI
// Example video: https://imgur.com/gallery/CcA1IXp
// alignmentGuide code from Asperi @ https://stackoverflow.com/a/58876712/11685049

import SwiftUI

codeactual

import SwiftUI

struct ColorText: View {
    
    // MARK:- Properties
    
    /// The attributed string to display.
    private let attributedString: AttributedString
    
    var body: some View {

codeactual

import UIKit

struct IceCream {
    let title: String
    let icon: UIImage
}

struct AppSettings {
    static var fontSize = 17.0
}

codeactual

extension Error {
    var code: Int { return (self as NSError).code }
    var domain: String { return (self as NSError).domain }
    var userInfo: [String:Any] { return (self as NSError).userInfo }

    func timeAfterWhichToRetry(retryCount: Int) -> TimeInterval? {
        // CloudKit suggests us retry too often, so slow us down as we retry a lot, up to 5 minutes
        if let suggestedTimeout = suggestedTimeAfterWhichToRetry {
            if suggestedTimeAfterWhichToRetry == 0 {
                return 0

codeactual

import SwiftUI

@main
struct testColorSchemeApp: App {
    @StateObject private var appearanceManager = AppearanceManager()

    var body: some Scene {
        WindowGroup {
            ContentView()
                .environmentObject(appearanceManager)

codeactual

//
//  RemindersAppIcon.swift
//  RemindersAppIcon
//
//  Created by David on 1/5/22.
//

import SwiftUI

struct RemindersAppIcon: View {

codeactual

//
//  PomodoroPicker.swift
//  pomodoro
//
//  Created by David Rozmajzl on 1/1/22.
//

import SwiftUI

struct PomodoroPicker<Content, Item: Hashable>: View where Content: View {