Counting down the dubdub

Jeroen Leenarts: Hi and welcome to the 30th episode of my podcast. My name is Jeroen Leenarts. And I've been developing software for over 18 years, I've been developing iOS apps over nine years, and I'm running Legco cash for over seven years. If you're an iOS app developer, you should listen to my podcast because we'll keep you updated on interesting articles and events. In this episode I'm going to talk about and away we coat coordinates and memory store crop UI image in Swift, implementing custom pop ups in Swift UI, integrating face ID Touch ID with Swift UI. And done is Monday morning tweets. So let's get started. I'm sitting here in the attic. And it's starting to look more and more like a proper desk. Again, I treat myself with a new 27 inch screen. And it really helps my workflow, being able to just lay out everything in front of me. I'm really looking forward to the content of the WWDC. And that's also going to be one of the articles that I'm going to mention in a bit. And by the looks of things, I will have my desk ready to go before the WWDC will start. So that's a good thing, because I don't think my family will enjoy endless videos of developer content being played back on the big television in the living room. I've also been seeing some great developments with a few community members. I'm talking about some people that I know a bit more intimate than people that are on the other side of the world. So hopefully I can share a bit more on their journeys. My my recorded interviews for the coming weeks ready to go our interviews are already recorded with Jordi brand, Philip Nemecek de fer where Dominic Williams and Orion to the freeze. I also have work scheduled with Kim Arnett, I'm really looking for some fresh faces for the future. So if you know somebody you think I should interview from a podcast or if you are somebody yourself, who would like to be interviewed for my podcast, reach out, get in touch on Twitter at app Force One. I really like digging into the backstories of my guests during an interview. And I hope you've been enjoying the results of my work as much as I have been enjoying creating the content itself. Obviously, quote, unquote, this week's articles have been a bit sparse because of my switch schedule last week. So let's start with articles that were fresh and new this week and see where we'll end up. The first article I want to talk about is about some event that will happen on June 7, Apple has announced the some of the content that will be available during the WWDC. But now we know that there will be a keynote State of the Union and the Apple design awards we'll be back. Not a lot of details yet on their webpage. But there's enough little bits of information that are interesting to just have a look at. So head on over to developer.apple.com/wwdc to one. The next article is from user love core data in memory store. It's an article about how you can use the in memory core data stack for speeding up your tests and stretch by previews. The core data stack normally use on disk SQLite as a storage back end, and that causes some extra work on running tests as you need to reset the store to a known state before each test. It's also relatively slow, which can be a pain when you're working with Swift UI previews. And in the article it will describe how you can create an in memory store instead of an SQLite based store. And what are some of the advantages and things you need to take into account when using an in memory store. So have a look at Keith Harrison's article on core data in memory store. Rob Robert Pietta writes an article on cropping your images in Swift and his article he teaches you how to crop your image in Swift, two different boundaries, including centering and circular crops like social media apps. cropping images is a common task across iOS and Mac OS apps, especially cropping user profile images in social media apps is a perfect example of this in practice. In this post, Robert presents examples of cropping images in Swift, including a center and circle crop. It's a very practical article with very useful tips that you can immediately apply when you're dealing with cropping of images in Swift, in his article item wants to highlight the key moments of implementing custom pop ups. It won't be a tutorial format, but he will add a specific layout. And he hopes it helps you when you're using overlays to map to readers and modifiers in your projects. So he starts with a little bit of design upfront, then talks a bit about modifiers and few extensions, and then the pop up layout to required animations. And he ends up with the actual source code for you for reference. The reason you want to look at this article because it takes you to the journey of actually designing something and then implementing it all by using Swift and its language features to create a convenient and concise extension are a few modifier that you can apply in your project. And the Urbanus writes an article on how you can use face ID or touch ID within swift UI. It's a nice overview of what you can do with the local authentication framework. And how you can actually use biometrics to challenge the user to actually present their biometric identification. It's an interesting article that allows you to get some details on how you can use biometrics on iOS. And there is one thing you should improve upon on this specific article in his article nd, indicates that you can evaluate a policy for device ownership, but you should actually guard the actual piece of information within the keychain, with the correct access control attributes, and I have a additional link in the show notes to some code that I wrote, that I think is a good addition onto the content that Andy has read. It requires a bit of a conceptual change compared to what Andy's doing. And he is really checking for a device policy. And what I suggest that you do is store specific information in the keychain with these access control attributes. And then you can just query and read the data from the keychain, but because these access control attributes are present on this item, it will in fact, trigger a biometric challenge to you as an end user, and thus safeguarding the data with the biometrics for the actual device. And those are the articles for this week. Except for the special one, let's pull the lever again. Swift UI in wealth biases are foggers Casa Seca, or how we started using Swift why in production code without major headaches. With the product owners Greenlight for dropping the support for iOS 12 downwards a new world of juicy possibilities emerged in the development horizon of CSR and his team. Together with iOS 13, two major new Apple frameworks were released combined and swift UI the new framework to design and develop user interfaces declaratively and with less code in this story says are wants to present the process that they followed when they started using Swift UI in their production code base to combine part of their transition went relatively smoothly, but swift UI required some more work and elbow grease. And now Don is Monday morning tweets. Steward Lynch has just released his swift UI combined open source project YouTube channel watcher, combined code has been thanks to daanish Christian Kozlovsky, has released his radio app called eater for Mac OS iOS entative. Us. Soon he will be releasing the 101 update that adds previous searches feature and improves a bit of UI. Michael Tigges is wrapping up adding a couple of in app widgets and dark mode teams for focused work app. Leo G. Dion is putting out an article on dev teams and UI design. He released an episode that he did with Josh Holtz of Fastlane tools. And he updated some articles face on CI and Swift package manager. And he's preparing for empowered apps episodes during WWDC 2021. On top of that, he's also been playing around with full stack swift app for watch iOS and Mac OS 10 stuff built on top of his video of last week, in which he built a dynamic form, but this time, he's adding some form validation using combine. But Rick is currently trying to make custom UI navigation control UI Split View control and he's having to adjust to in person schooling again, limited DFS released bluebirds app 2.0 and overall from React Native to Swift UI. Since then, limited DFS has been working on letting more people know the app, which feels much tougher than the coding part. Not much Shikata has a big day to day, he is turning a side project into a real thing called stack sift. It's a crash reporting utility for iOS Mac OS NT for us, end user and developer privacy is modular with an optional SDK. Lots of open source it supports metric it and it's a new take on analysis and grouping. You can find more info on stack sift.io They're still looking for testers at Daniel Bauer is working on his terramin app is trying to map patches and frequencies from audio get to a slider but the distance of hertz between nodes increase as you co REO will. So we'll try to create pitch reach and send average terahertz rates across each region. I I'm not even sure what I just said there. But I think Daniel knows what he's doing. And with that, we're there for this episode. If you have any feedback or comments, please DM me on Twitter at app Force One. I really look forward to your feedback, your comments, your ideas, and suggestions just let me know what you think and I will talk to you again next week