Lukas Kubanek lukaskubanek

Shortcut	Description	Overridable?[^1]
`Fn-A`	Navigate Dock	No
`Fn-Shift-A`	Launchpad	No
`Fn-C`	Control Center	No
`Fn-E`	Emoji & Symbols	Yes
`Fn-F`	Enter/Exit Full Screen	Yes
`Fn-H`	Desktop	No
`Fn-M`	Navigate Main Menu	Yes
`Fn-N`	Notifications	No

This is an excerpt from our internal documentation describing an issue with drawing in NSViews on macOS Big Sur.

1️⃣ Introduction

In macOS Big Sur (probably starting with β9), Apple changed the default contents format for backing layers of NSViews. Instead of an explicit CALayerContentsFormat.RGBA8Uint value, an „Automatic“ value is now used. Even though it also resolves into „RGBA8“ in our testing, it has some serious implications as it breaks assumptions our code relies on.

I first stumbled upon this issue in this tweet by Frank. It links to a thread on Apple Forums by Mark that contains valuable information as well as ideas for workarounds. The changed behavior was also confirmed by Marcin in this tweet.

2️⃣ Impact on Diagrams

Import keybase.io keys to GPG locally (→ link)
Add new email address to the public key (→ link)
Export the public key and upload it to keybase.io again (→ link)
Configure GPG for Git locally (→ link)

My Wishes for Swift 3.0

Typed errors
Property observers from outside as a replacement for KVO
Resolving the limitation in failable class initializers which require setting all stored properties before throwing an error or returning nil
Operator for reversed ranges (https://medium.com/@icex33/boundary-extension-in-swift-1f577af1aaa)
Nested types in generic types
Packages (inside frameworks, allowing cyclic dependencies)
Members for protocols tied to the protocol type (e.g. for implementing factories on the protocol types)
Abstract classes & class methods

	import SwiftUI

	extension View {

	/// A custom popover modifier that ensures the system automatically selects the best
	/// orientation for the popover's arrow, compatible with both iOS 17 and 18.
	///
	/// On iOS 17, the `arrowEdge` is treated as a hint and may be ignored if the popover does
	/// not fit. On iOS 18, the `arrowEdge` is strictly enforced, potentially causing layout
	/// issues if the content doesn't fit.

	import InterposeKit
	import UIKit
	import SwiftUI
	import SwiftUIIntrospect

	extension View {
	public func keyboardAvoidanceDisabled() -> some View {
	self.introspect(.viewController, on: .iOS(.v17)) { viewController in
	if let hostingView = viewController.parent?.view {
	if String(describing: type(of: hostingView)).hasPrefix("_UIHostingView") {

	import InterposeKit
	import SwiftUI

	/// A workaround for an issue in SwiftUI related to delayed highlighting of list rows upon user
	/// interaction, rendering it inconsistent with UIKit.
	///
	/// This fix implements the solution proposed by Léo Natan and utilizes `InterposeKit` by Peter
	/// Steinberger to modify the behavior of `UICollectionViewCell` instances used internally
	/// by SwiftUI.
	///

	/// MIT License
	///
	/// Copyright (c) 2021 Lukas Kubanek, Structured Path GmbH
	///
	/// Permission is hereby granted, free of charge, to any person obtaining a copy
	/// of this software and associated documentation files (the "Software"), to deal
	/// in the Software without restriction, including without limitation the rights
	/// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
	/// copies of the Software, and to permit persons to whom the Software is
	/// furnished to do so, subject to the following conditions:

	import XCTest

	public func XCTAssertThrowsError<T, E: Error & Equatable>(
	_ expression: @autoclosure () throws -> T,
	expected expectedError: E,
	_ message: String = "",
	file: StaticString = #filePath,
	line: UInt = #line
	) {
	XCTAssertThrowsError(try expression(), message, file: file, line: line) { error in

	// Optional Assignment

	infix operator =? { associativity right precedence 90 }

	/// Given a variable and an optional value it unwraps the optional value
	/// and if it is non-nil it assigns the value to the variable. If the value
	/// is nil it does nothing.
	public func =? <T>(inout variable: T, optionalValue: T?) {
	if let value = optionalValue {
	variable = value