Julien Di Marco lifely

SwiftUIHostingConfiguration

In iOS 16, Apple added UIHostingConfiguration, making it straightforward to use a SwiftUI view in instances of UICollectionViewCell and UITableViewCell. This gist shows how UIHostingConfiguration can be backported to iOS 14 by implementing a type that conforms to UIContentConfiguration.

Starting from iOS 16, we can use SwiftUI views in an instance of UICollectionView or UITableViewCell like this:

cell.contentConfiguration = UIHostingConfiguration {
    ExampleCellContentView(color: Color(item.color), text: item.text)
}

ℹ️ This article is also available on his blog.

Fundamentals

Layout and Drawing are two different things:

Layout defines only the positions and sizes of all views on screen.
Drawing specifies how each view is rendered (how it looks).

ANSI Escape Sequences

Standard escape codes are prefixed with Escape:

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

Diff output of two lldb commands

Setup

Copy the contents of the last snippet (lldbinit) from the gist page, and paste into your .lldbinit file. This makes the ksdiff macro known inside lldb.
Put file ksdiff.py in ~/.lldb/
sudo pip install temp
Restart Xcode debug session

Example

(lldb) ksdiff ;

iOS app introspection

Jailbreak in 2025
Create Provisioning Profile in XCode

	@available(iOS 15.0, *)
	struct TwinkleView:View {

	private func position(in proxy: GeometryProxy, sparkle:Sparkle) -> CGPoint {
	let radius = min(proxy.size.width, proxy.size.height) / 2.0
	let drawnRadius = (radius - 5) * sparkle.position.x
	let angle = Double.pi * 2.0 * sparkle.position.y

	let x = proxy.size.width * 0.5 + drawnRadius * cos(angle)
	let y = proxy.size.height * 0.5 + drawnRadius * sin(angle)

	// MARK: - TCAView
	public protocol TCAView: View where Body == WithViewStore<ScopedState, ScopedAction, Content> {
	associatedtype ViewState
	associatedtype ViewAction

	associatedtype ScopedState
	associatedtype ScopedAction

	associatedtype Content

	#!/usr/bin/ruby

	require 'set'

	# Constants
	OUTPUT_BULLET = "•"
	OUTPUT_BULLET_COLORS = [9, 3, 2, 75, 99]

	# Help information
	HELP_COMMANDS = ["-h", "--help", "help"]

	class FirebaseCoordinator {
	static let shared = FirebaseCoordinator()
	static let initialize: Void = {
	/// We modify Google Firebase (and eventually Analytics) to load the mac-specific plist at runtime.
	/// Google enforces that we have a file named "GoogleService-Info.plist" in the app resources.
	/// This is unfortunate since we need two different files based on iOS and Mac version
	/// One solution is a custom build step that copies in the correct file:
	/// https://stackoverflow.com/questions/37615405/use-different-googleservice-info-plist-for-different-build-schemes
	/// However, this is basically impossible since Catalyst doesn't set any custom build variables, so detection is extremely difficult.
	/// We swizzle to modify the loading times.

	import UIKit
	import AVKit

	class VideoView: UIView {

	// video layer that will stream the url
	private let videoLayer = AVPlayerLayer()

	// pan gesture used for scrubbing
	private let panGesture = UIPanGestureRecognizer()