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This gist demonstrates how to build a Kotlin MPP library so that the iOS sourceSet depends on and uses an iOS Framework as a dependency.

Key ideas:

We use [Carthage] to retrieve/build the iOS Framework.
We use [cinterop] to create bindings allowing us to use the iOS Framework from Kotlin
We build and publish the library using ./gradlew publishToMavenLocal
We build and publish [klib] artifacts for both the arm64 and x86_64 architectures, you can easily add arm32 if you need.
Note that the publish process also publishes a cinterop klib artifact, allowing dependents to also know about the iOS Framework headers.

You can find a gist explaining how to use such library in an iOS app [here][ios-app].

WWDC18 Notes - Session 416 - iOS Memory Deep Dive

All session list link: Here
Session Link: Here
Demo starts @ 25:30 in the video.
Download session slides: Here

This notes is written by Sheldon after watching WWDC18 session 416. You can find me with #iOSBySheldon in Github, Youtube, Facebook, etc.

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

Value semantics and pure functions: referential transparency for Swift

Author: Matthew Johnson

Swift Concurrency Manifesto

Author: Chris Lattner

Chinese Translation by Jason Yu

React & Elm inspired frameworks in Swift

This is a curated list of iOS (Swift & ObjC) frameworks which are inspired by React and Elm.

Swift frameworks

React-inspired

ReactSwift by @ColinEberhardt
https://github.com/ColinEberhardt/ReactSwift

What are Lenses? Great explanation by @mbrandonw

Files:

input.swift - sample structs for which we want helpers to be generated
lens.stencil - sourcery template to generate lenses helpers
output.swift - sample lenses helpers generated
zLens.swift - simple implementation of lenses, so you can play with it

Hints:

Usually you want to generate helpers only for certain structs in your project. To limit scope of sourcery changes, keep your relevant structs under one directory and just point sourcery to that directory instead of whole project.

	defaults write com.apple.dt.Xcode ShowDVTDebugMenu -bool YES
	sudo mkdir -p /Applications/Xcode.app/Contents/Developer/AppleInternal/Library/Xcode
	sudo touch /Applications/Xcode.app/Contents/Developer/AppleInternal/Library/Xcode/AppleInternal.plist

	# Don't forget to restart Xcode

	//
	// TalkDockViewController.swift
	// Dockee
	//
	// Created by Danny Hertz on 11/30/18.
	// Copyright © 2018 Danny Hertz. All rights reserved.
	//

	import Foundation
	import RxCocoa