lukaskubanek

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

FWEugene

Threads

Foundation offers a Thread class, internally based on pthread, that can be used to create new threads and execute closures.

// Detaches a new thread and uses the specified selector as the thread entry point.
Thread.detachNewThreadSelector(selector: Selector>, toTarget: Any, with: Any)

// Subclass
class MyThread: Thread {

HarryUPf

Raspberry Pi SunVox Headless Synth Setup (in 10-easy-steps)

INSTRUCTIONS

STEP_01

• download and unzip stable RealtimePi distro

STEP_02

• write the extracted .img to sdcard with Etcher

STEP_03

zachloubier

# Next Youtube Video in Playlist
tell application "Google Chrome"
  repeat with t in tabs of windows
    tell t
      if URL starts with "http://www.youtube.com/watch" or URL starts with "https://www.youtube.com/watch" then
        execute javascript "
        var player = document.getElementById('movie_player') || document.getElementsByTagName('embed')[0];
        
        if (player) {
          document.getElementsByClassName('ytp-next-button')[0].click()

mackuba

Here's my own list of the interesting stuff announced during this year's WWDC, collected from the keynotes, various Apple docs, blog posts and tweets.

If you're planning to watch the videos, I really recommend this Mac app that helps you download and watch them: https://github.com/insidegui/WWDC.

OS X El Capitan

http://www.apple.com/osx/elcapitan-preview/

• split view - two apps side by side on full screen

protrolium

ffmpeg

Converting Audio into Different Formats / Sample Rates

Minimal example: transcode from MP3 to WMA:
ffmpeg -i input.mp3 output.wma

You can get the list of supported formats with:
ffmpeg -formats

You can get the list of installed codecs with:

raphaelhanneken

//
// NSImageExtensions.swift
//

import Cocoa

extension NSImage {

    /// The height of the image.
    var height: CGFloat {

SheffieldKevin

#!/usr/bin/env swift

import Foundation
import AVFoundation


if Process.arguments.count != 2 {
  println("The first and only argument should be a full path to a movie or music file.")
  exit(1)
}

fent

# If in a playlist, play the next video.
tell application "Google Chrome"
  repeat with t in tabs of windows
    tell t
      if URL starts with "http://www.youtube.com/watch" or URL starts with "https://www.youtube.com/watch" then
        execute javascript "
        var player =
          document.getElementById('movie_player') ||
          document.getElementsByTagName('embed')[0];
        var next = document.getElementsByClassName('yt-uix-button-icon-playlist-bar-next')[0];

jwilling

Is AppKit causing you frustration? Instead of just complaining about it, lets try to make it better by compiling a list of specific problems with AppKit. Leave a comment below, and I'll include it in the list.

---

##NSView##

• NSView does not have the ability to set an affine transform (rdar://15608609)
• Controls that have cells (such as NSTextField) do not respond properly when layer-backed. Take NSButton as an example. When not layer-backed, it will animate properly using the animator proxy. When layer-backed, using the animator proxy breaks focus rings (they jump to destination immediately). Currently, directly manipulating the layer of a cell-based control is not supported (and will lead to a broken interface), but is much needed. (rdar://15608822)

##NSViewController##

• NSViewController could be more useful. It has -loadView but no other lifecycle methods. (rdar://15608948)