UnderscoreDavidSmith

@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)

IanKeen

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

    associatedtype ScopedState
    associatedtype ScopedAction

    associatedtype Content

steipete

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.

chosa91

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).

freshking

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()

fnky

ANSI Escape Sequences

Standard escape codes are prefixed with Escape:

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

catlan

Diff output of two lldb commands

Setup

1. 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.
2. Put file ksdiff.py in ~/.lldb/
3. sudo pip install temp
4. Restart Xcode debug session

Example

(lldb) ksdiff ;

rustymagnet3000

Static / Dynamic iOS app inspection

• Jailbreak in 2023
• Get decrypted IPA off a Jailbroken device
• Get App Store iPAs
• Dump KeyChain
• Inspect files inside ipa
• Inspect sandbox data on Jailbroken device

tclementdev

libdispatch efficiency tips

The libdispatch is one of the most misused API due to the way it was presented to us when it was introduced and for many years after that, and due to the confusing documentation and API. This page is a compilation of important things to know if you're going to use this library. Many references are available at the end of this document pointing to comments from Apple's very own libdispatch maintainer (Pierre Habouzit).

My take-aways are:

• You should create very few, long-lived, well-defined queues. These queues should be seen as execution contexts in your program (gui, background work, ...) that benefit from executing in parallel. An important thing to note is that if these queues are all active at once, you will get as many threads running. In most apps, you probably do not need to create more than 3 or 4 queues.

• Go serial first, and as you find performance bottle necks, measure why, and if concurrency helps, apply with care, always validating under system pressure. Reuse

douglashill

// Douglas Hill, February 2018

import Foundation

/// Returns a localised string with the key as an enum case so the compiler checks it exists.
/// The enum should be automatically generated using UpdateLocalisedStringKeys.swift.
public func localisedString(_ key: LocalisedStringKey) -> String {
    return Bundle.main.localizedString(forKey: key.rawValue, value: nil, table: nil)
}