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A while ago I wrote about using MVVM in a SwiftUI project. During the WWDC’20 Apple announced @StateObject property wrapper which is a nice addition in the context of MVVM. @StateObject makes sure that only one instance is created per a view structure. This enables us to use @StateObject property wrappers for class type view …
Xcode 12 comes with Swift toolchain 5.3 which brings resource and localisation support to Swift packages. Nice thing is that Swift package support only depends on the toolchain's version and does not have additional OS requirements. At the same time, let's keep in mind that OS requirements come from the code we actually add to …
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I am happy to announce that Signal Path 2.0 is available now for macOS and iOS. Signal Path uses Apple's universal purchase offering - buy it once for both platforms. Signal Path 2.0 on the App Store Past, present, and future I spent a lot of time architecting both apps in a way that they …
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XCTMetric enables creating tests with measure blocks collecting information about CPU, memory and disk. In this post we'll write UI-tests measuring a button tap what triggers writing to disk, allocating larger amount of memory and applying filters what requires CPU to do more work. It should be noted that XCTMetric can also be used in …
Instead of initializing SwiftUI views with dependencies, SwiftUI also offers other ways for injecting dependencies. This time let's take a look on EnvironmentKey which defines a key for inserting objects to environment and vise-versa. We need to create a EnvironmentKey, adding an object to environment and then getting the object in SwiftUI view. Creating EnvironmentKey …
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Let's build a container where we can store collections of items conforming to a protocol. All the collections are identified by a case in enum. For making the container reusable, we'll use protocols as requirements on keys and items in collections. Moreover, the container should be archivable and unarchivable. Creating a reusable container Container's implementation …
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iOS and macOS got a new framework in WWDC'19 named LinkPresentation. LinkPresentation enables fetching URL previews. Adding LPLinkView for presenting preview LPLinkView is a view subclass meant for rendering LPLinkMetadata. LPLinkMetadata contains information about the link: title, icon, image, video. https://gist.github.com/laevandus/62c9d1d2987652cb0af149aaa4f38985 Adding LPLinkView to stack view Fetching previews with LPMetadataProvider Instances of LPLinkMetadata are fetched …
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