Johnny Tseng JohnnyTseng

Re-signing an .ipa file for iOS distribution

There are several apps I currently have to re-sign. They are apps built by various outside vendors who do not want to share the source code, but we want the apps published from our account and we do not want to give them our certificate or access to publish the apps on our behalf. ¯\_(ツ)_/¯ These are the steps I use to re-sign them. I've decided to keep the steps manual because, frankly, it's an error-prone process, something done infrequently, and a moving target. Some detail always seems to shift with every major Xcode release or App Store change.

These steps are current as of iOS 14 and Xcode 12. They assume you already have your Distribution Certificate installed in Keychain.

I'm going to use an example named "Matt's App.ipa". If you need to provide instructions to a vendor to deliver this file to you properly, I've included what I use below.

Automatic build versions from git in Xcode (and other goodies)

Installation procedure for pre-build actions to automatically populate Xcode Info.plist with dynamic data.

1. Xcode Scheme pre-action

Edit Xcode Scheme and add a pre-action script. Copy the contents of preaction.sh into the pre-action script box.

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

本文件主要係提供使用公共運輸整合流通服務平臺（Public Transport Data eXchange）各項資料服務加值業者，在程式開發過程中常見問題的處理方式及資料使用的注意事項，使開發者能更快速地掌握PTX APIs的資料特性，並避免在旅運加值應用上資料運用錯誤。

【平臺使用會員分級說明】

交通部公共運輸整合資訊流通服務平臺會員將分為網站會員及API會員，API會員將細分為一般會員、進階會員、專案用戶；請詳見下列會員權益說明。

更多申請會員FAQ請參閱連結。

Generics in Swift

泛型程式設計（Generic Programming） 是經典的程式設計典範之一，不論是老牌的 C++，還是潮潮的 TypeScript，都能一睹泛型的風采。近年來，程式設計吹的是 static typing 風，泛型又開始被廣泛討論。

本篇將簡單介紹泛型的背景，再來理解並學習 Swift 語言的泛型寫法。

（撰於 2017-05-08，基於 Swift 3.1）

Buy NGINX Plus: https://www.nginx.com/products/

SaaS:

Scalyr: https://www.scalyr.com/
Logentries: https://logentries.com/
Librato: https://www.librato.com/
SenverDensity: https://www.serverdensity.com/
Scout: https://scoutapp.com/
Datadog: https://www.datadoghq.com/

Extracting Emoji From Slack!

Slack doesn't provide an easy way to extract custom emoji from a team. (Especially teams with thousands of custom emoji) This Gist walks you through a relatively simple approach to get your emoji out.

If you're an admin of your own team, you can get the list of emoji directly using this API: https://api.slack.com/methods/emoji.list. Once you have it, skip to Step 3

HOWEVER! This gist is intended for people who don't have admin access, nor access tokens for using that list.

Follow along...

Wil Turner, Brook Callhan: Speakers

##3 Main components/concepts that enable UI Testing:##

UITesting
- Find and interact w/ UI elements
- Validate UI properties and state
UIrecording
- Updated test reports to include UI testing data
- UI testing is enabled by XCTest and UI Accesibility

	#!/bin/bash

	if [ $# -lt 1 ]; then
	echo "Usage: $0 [enable\|disable]"
	exit 1
	fi

	plistLoc="/private/var/root/Library/Preferences/com.apple.CoreBrightness.plist"

	currentUserUID=$(dscl . -read /Users/$(whoami)/ GeneratedUID) # Get the GeneratedUID for the current user