Wave shape with red button on top of it
Animating a custom wave shape in SwiftUI
@StateObject and MVVM in SwiftUI
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 …
Separating code with Swift packages in Xcode
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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Picker and segmented control in SwiftUI on iOS
Picker is used for presenting a selection consisting of multiple options. UISegmentedControl which is known from UIKit is just a different picker style in SwiftUI. Let's take a quick look on how to create a form with two items: picker with default style and picker with segmented style. Creating a from Form should be typically …
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Using SwiftUI previews for UIKit views
SwiftUI provides wrappers for UIViewController and UIView on iOS. Same wrappers are also available for AppKit views on macOS. Let's see how to use those wrappers for rendering UIKit views in SwiftUI previews and therefore benefiting from seeing changes immediately. Note that even when a project can't support SwiftUI views because of the minimum deployment …
Signal Path 2.0 for iOS and macOS is available now!
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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Setting an equal width to text views in SwiftUI
Let's take a look on how to set an equal width to multiple views where the width equals to the widest Text() view in SwiftUI. SwiftUI does not have an easy to use view modifier for this at the moment, therefore we'll add one ourselves. Example use case is displaying two text bubbles with width …
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Validating string in TextField with NumberFormatter in SwiftUI
I was looking into creating a view which has TextField with NumberFormatter. Typed text would show up in a separate label and when trying to enter non-numbers, the TextField would reject those characters. Although TextField component in SwiftUI has generic initialiser init(_:value:formatter:onEditingChanged:onCommit:) it does not seem to do what we need. Value binding does not …
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Revealing content behind keyboard in SwiftUI
By default SwiftUI view content gets behind a keyboard when editing text. Therefore let's create a view modifier which can be easily added to any SwiftUI view and enables revealing content behind the keyboard with animation. In the end we will fix this broken looking view where TextField is behind the keyboard. SwiftUI view with …
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MVVM and @dynamicMemberLookup in Swift
View models in MVVM are responsible of making the model suitable for presenting by a view. Quite often model objects themselves have properties which can be directly presented by the view. SE-0195 added dynamic member lookup types. Using @dynamicMemberLookup we can add all the model object's properties to the view model itself. Result, model.name is …
