Each app comes with performance issues, crashes, and bugs to fix. Although we try our very best we will always end up with unforeseen issues. Even when your app runs smoothly on your device, all tests succeed and QA green lights your build. Therefore, we can all use some tips to be better prepared for …
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Advanced asynchronous operations by making use of generics
Asynchronous operations allow you to write long-running tasks in a distinct matter while being able to add dependencies between several tasks. Progress can be tracked, and dispatching is made easy by making use of the OperationQueue. By adding generics and the Swift result type, we can get even more out of asynchronous operations. After getting …
Asynchronous operations for writing concurrent solutions in Swift
Asynchronous operations allow executing long-running tasks without having to block the calling thread until the execution completes. It’s a great way to create separation of concern, especially in combination with creating dependencies in-between operations. If you’re new to operations, I encourage you first to read my blog post Getting started with Operations and OperationQueues in Swift. …
Getting started with Operations and OperationQueues in Swift
Operations in Swift are a powerful way to separate responsibilities over several classes while keeping track of progress and dependencies. They’re formally known as NSOperations and used in combination with the OperationQueue. Make sure first to read my article on concurrency in Swift, so you know the basics of queues and dispatching. Operations have a lot …
Concurrent vs Serial DispatchQueue: Concurrency in Swift explained
Concurrent and Serial queues help us to manage how we execute tasks and help to make our applications run faster, more efficiently, and with improved responsiveness. We can create queues easily using the DispatchQueue class which is built on top of the Grand Central Dispatch (GCD) queue. The benefit of dispatch queues is that they’re …
Dark Mode: Adding support to your app in Swift
Dark Mode was introduced in iOS 13 and announced at WWDC 2019. It adds a darker theme to iOS and allows you to do the same for your app. It’s a great addition to give to your users so they can experience your app in a darker design. In this blog post, I’ll share with …
Core Data and App extensions: Sharing a single database
Core Data got better and better over the years with improved APIs that make it easier to work with. The Apple framework allows you to save your application’s permanent data for offline use, to provide undo functionality or to simply cache data for better performance. After implementing the basics into your app like using a …
Auto Layout in Swift: Writing constraints programmatically
Auto Layout constraints allow us to create views that dynamically adjust to different size classes and positions. The constraints will make sure that your views adjust to any size changes without having to manually update frames or positions. Can you imagine a world without Auto Layout? We used to calculate frames ourselves or we used …
Mastering the assistant editor in Xcode 11
Xcode 11 was introduced during WWDC 2019 and contained improvements in the way the assistant editor works. If you’re using a second editor a lot it can be quite frustrating at first when you try to use the same workflow in Xcode 11 when files are opened in the left editor while you expected them …
5 Xcode breakpoints tips you might not yet know
Xcode breakpoints allow us to debug and find out solutions for nasty bugs. Without breakpoints, it would be a fun fest with a lot of print statements everywhere in your code. The basic principles of breakpoints we probably all know but there’s a lot more to discover! What are breakpoints in Xcode? A breakpoint can …