We all love SwiftUI for its declarative approach and the ability to quickly prototype a UI. Its simplicity has a few drawbacks though, for example we don’t have full access to the actual view in the hierarchy. One of the problems is taking a screenshot of a particular View. If we deal with UIKit, getting
A nice addition to SwiftUI at WWDC21 is the new refreshable modifier to refresh view contents. This new feature is powered by maybe the biggest announcement at WWDC21: the new async/await pattern introduced in Swift 5.5.While this isn’t an article about this specific topic is important to know that what we’re going to see here
My third article about the new features added to SwiftUI at WWDC21 is a mix between two of them I’ve already covered in my previous posts. This time my goal is to draw an analog clock with the new Canvas view. Since I’m building a clock I’ll need a way to refresh my SwiftUI view
At WWDC21 Apple introduced TimelineView, a new SwiftUI View that update itself according to a schedule instead of relying on state variables. It may be useful in some scenario, for example if you want to refresh a view only every X seconds, or if you want to animate something providing new frames at a given
In this article I’ll show you how to integrate ARKit in a SwiftUI app. With this simple app, you’ll be able to tap on two points of the AR scene and calculate the distance between them. As usual, the code is available on GitHub. ARKit view Let’s start with ARKit. The example is quite simple,
UPDATE: WWDC21 introduced refreshable, a view modifier to implement pull to refresh in a List, see the example at the end. This article is still valid if you want to target iOS 13 and 14 as the new modifier is only iOS 15 compatible. Pull down to refresh a list is something quite common for
I really like SwiftUI but there is something that I’m not fond of, the fact that in order to push a new view into the stack you need to create it inside NavigationLink. Imagine you have view A and after pressing a button you can either go to view B or C. You can have
This post is about my first macOS app built with SwiftUI. I needed a utility to browse local images instead of using the Finder, I’m sure there are plenty of great alternatives out there but I thought I’d better make one to finally write a macOS app with SwiftUI. Last time I needed to make
This article is about one of the new features of iOS 14: Widgets. I’ll show you how to write a simple widget in SwiftUI, and how to update the widget data from your iOS app.As usual, all the code is available on GitHub. Intro What is a Widget? Is an extension to your app, showing
This article is about one of welcome additions to SwiftUI in 2020: LazyVGrid and LazyHGrid. As the name suggest, you can compose vertical and horizontal grid layout in a lazy way with those views. If you’re interested in lazy layout, check out my previous article on the topic. The sample project In this article I’ll
Using lists is very common in an iOS app. UITableViews are great and have been there from the very beginning, so you can find tons of articles about infinite scrolling. But what about SwiftUI?You don’t have UITableView, but you can use List. Although you can achieve a similar result you don’t have the concept of
Back in July I wrote a post about Navigation in SwiftUI trying to explain the difference between NavigationLink and DynamicNavigationDestinationLink. The latter has been deprecated, so the article is now useless, you can still find it here https://www.gfrigerio.com/navigation-in-swiftui-deprecated/I updated the repository on GitHub to remove the deprecated code and provide a few examples of various
Almost every iOS app needs to display images, you can have them in your app’s bundle or you load them from an external URL, and that’s what this article is all about.As usual you can find the source code on GitHub at this link Building the UI In the example I’m presenting a list of
One of the topics I wanted to explore about SwiftUI was how to integrate CoreData in it, and I want to describe two approaches you can follow: a direct one using property wrappers and another one by having a class hide the existence of Core Data to the user.I usually prefer the latter, as it
If you came across this blog post and you’re happy because you didn’t think it was possible to use NSAttributedString in SwiftUI I have a bad news: it isn’t supported yet. Text in SwiftUI accept a String and there isn’t the equivalent of attributedText you can find in UILabel. So what is this article about?
Progress bars and activity indicators is something we tend to use a lot in iOS applications and it is nice to customise them instead of using all the time the standard UIActivityIndicatorView.I think SwiftUI makes it really easy to build this kind of views and I implemented 4 of them in my sample GitHub project
UPDATE: DynamicNavigationDestinationLink has been deprecated so most of this article is useless. I wrote a new one and updated the GitHub repository In this post I want to explain the difference between NavigationLink and DynamicNavigationDestinationLink in SwiftUI with a quick example and point out the differences between them.You can find the sample code on GitHub
SwiftUI was one of my favourite announcements during WWDC 2019 alongside Combine. At the time I’m writing this post, mid July, beta 4 has just been released and although it isn’t yet stable I think SwiftUI is starting to get interesting. I think it will be hard to drop iOS 12 support soon, but SwiftUI