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Learn four techniques of unit testing concurrent code in Swift using the XCTest framework: mocking, test before & after, XCTestExpectation, busy assertion.

This week, let’s take a look at a technique that can let us leverage Swift’s type system to perform data validation at compile time — removing potential sources of ambiguity, and helping us preserve type safety throughout our code base — by using phantom…

Learn when to use a Set, NSOrderedSet or an Array based on the differences like performance, uniqueness of elements and the order of elements.

Some LLDB and Instruments magic to help everyone debug like a real pro. Second edition!

How to create a more complex custom operator

Some of the lesser-known features and tricks of Xcode

Siri Shortcuts offer the ability to perform certain app functionalities in the background. Get to know how to implement them!

Not all Swift things are developed in Xcode -- things like the Swift Compiler or Apple's SourceKit-LSP work better through other means, and these means usually end up having you use lldb manually. Without Xcode to assist you, some of these tricks can prevent…

Provides an example project and walkthrough for saving and syncing a single Core Data Entity with CloudKit using NSPersistentCloudKitContainer

Dark theme is one of the most requested features over the past few years. Both Apple and Google made a dark theme an essential part of UI…

In todays tutorial we will be learning how to create a floating action button using SwiftUI. I have wanted to make a floating action…

Full tutorial using different libraries — TesseractOCRiOS, SwiftOCR, and Google MLVision | Can we beat Google?

ViewModifiers play a significant role in SwiftUI. Most of the functions called on a View are ViewModifiers. It is the primary way of modifying the view instance in SwiftUI. In this post, we will take a look at some ready to use ViewModifiers, and then we…

There might be case where your app have a database containing preset static information that won’t be modified, added or deleted by user. The database will only be used for querying or searching, how do we embed a database prepopulated with data into the…

This week, let’s take a look at convenient, but sometimes divisive language feature — computed properties — and how they can let us build really elegant convenience APIs, how to avoid accidentally hiding performance problems when deploying them, and a few…

Here's my quick guide to creating Swift packages with Xcode.

In many of us, we’re iOS developers who are desire to reduce your app’s loading time. Many and many articles were written to gave you some tricks & tips to improve it, you can check it here Slow App Startup Times, Someday I go through this WWDC video Optimizing…

This week, let’s take a look at how subscripting works in Swift, and a few different ways to incorporate it into the way we design APIs — including some brand new capabilities that are being added in Swift 5.1.