Swift blog posts, tutorials, tips, and tricks

Custom subscripts in Swift explained with code examples

Custom subscripts in Swift allow you to write shortcuts to elements from collections or sequences and can be defined within ...
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Mar 31, 2020 • 4 min read Swift

NSFetchedResultsController extension to observe relationship changes

Apple provides us with great classes like the NSFetchedResultsController to interact with Core Data databases in our apps. The API ...
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Mar 24, 2020 • 8 min read Core Data Swift

Testing private methods and variables in Swift

Testing private methods and variables is often something we run into when writing tests for our applications. You could think ...
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Mar 17, 2020 • 6 min read Swift

How to mock Alamofire and URLSession requests in Swift

Mocking data requests that are triggered by either Alamofire or URLSession is something we all run into when we start ...
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Mar 10, 2020 • 6 min read Swift

Creating a command line tool using the Swift Package Manager

A command-line tool can be very useful for automating common tasks to boost developer productivity. While developing iOS applications we ...
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Mar 03, 2020 • 7 min read Swift

Authentication with signed requests in Alamofire 5

With more than 30k stars on Github, you can tell that Alamofire is a popular framework to use for iOS ...
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Feb 25, 2020 • 5 min read Swift

Swift Package Manager framework creation in Xcode

Swift Package Manager is Apple's answer for managing dependencies. We're all familiar with tools like CocoaPods and Carthage but it's ...
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Feb 04, 2020 • 6 min read Swift

Unique values in Swift: Removing duplicates from an array

Removing duplicates to get unique values out of an array can be a common task to perform. Languages like Ruby ...
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Jan 28, 2020 • 3 min read Swift

JSON Parsing in Swift explained with code examples

JSON parsing in Swift is a common thing to do. Almost every app decodes JSON to show data in a ...
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Jan 21, 2020 • 5 min read Swift

Ranges in Swift explained with code examples

Ranges in Swift allow us to select parts of Strings, collections, and other types. They're the Swift variant of NSRange ...
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Jan 14, 2020 • 4 min read Swift

EXC_BAD_ACCESS crash error: Understanding and solving it

Building apps all goes well in the beginning. You're developing an app from scratch, it's stable, and runs perfectly fine ...
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Jan 07, 2020 • 4 min read Swift

SwiftLee 2019 in review: Top Swift Development blog posts

You know it's been a great year if you have the feeling that it went really fast. After looking back ...
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Dec 31, 2019 • 5 min read Swift