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Category: SwiftUI

Gradient text in SwiftUI

If we want to spice up the user interface, then we can make some titles in the app to use gradient colours. In WWDC’21 Apple introduced an API for making gradient text styles easy to create. The .foregroundStyle() view modifier takes in a type which conforms to ShapeStyle protocol. One of these types are gradient types in SwiftUI. Therefore, creating a fun gradient text is a matter of creating a text and applying a foregroundStyle view modifier with a gradient on it. The new view modifier is great, but it… Read more Gradient text in SwiftUI

Focusing views in SwiftUI

WWDC’21 introduced APIs for managing focus in SwiftUI. When dealing with multiple focusable views, we can create an enum for representing these and use the new @FocusState property wrapper along with focused() view modifier, where each of the focusable view binds its focus to an enum case. This can look like this: In this example we have FormEntry enum which represents focusable elements in the view. Each of the view has a focused() view modifier, which binds the current focus state to the text field if it matches with the… Read more Focusing views in SwiftUI

Tab view in SwiftUI

TabView is a container view which enables navigating between multiple flows by selecting one of the items on the tab bar. Tapping on a tab item replaces the visible view with a view associated with the item. Tab view is set up by creating views which have tab items attached. Tab items are created with the tabItem() view modifier, which supports setting a text and an image. In addition, there is a badge() view modifier if we would like to show a badge on top of the item. Tab view… Read more Tab view in SwiftUI

Structuring platform specific code in SwiftUI

Xcode provides a cross-platform app template in SwiftUI which can be built for macOS and iOS. This template includes a Shared folder which is meant for code used both on macOS and iOS. Many SwiftUI types and functions work both on macOS and iOS but along with developing an app we’ll encounter cases where we need to specialize per platform. When I was building a multiplatform app then the very first thing I encountered was list styles. On macOS I wanted to use a different list style than on iOS… Read more Structuring platform specific code in SwiftUI

Sidebar layout on macOS in SwiftUI

A common UI layout on macOS has a sidebar and detail view side by side. The sidebar contains a list of items, where the selected item is displayed on the right and displays details of it. One would expect that creating such a view hierarchy in SwiftUI should be pretty easy to set up. In this post, we’ll take a look at how to create a basic view with sidebar which supports selection. Building the layout We’ll build a simple sample app which shows a list of fruits in the… Read more Sidebar layout on macOS in SwiftUI

Image converter with AsyncSequence

WWDC’21 brought us a new protocol named AsyncSequence. As the name stands, it represents a sequence of asynchronous elements. For trying out the new API we’ll build a tiny ThumbnailSequence which takes in a list of image names and by iterating the sequence, we’ll get back scaled thumbnails for those image names one by one. The image scaling runs on a background thread. The AsyncSequence protocol comes with two associated types: Element and AsyncIterator. Element represents the type which is produced by the sequence, and AsyncIterator is the type responsible… Read more Image converter with AsyncSequence

Exploring AttributedString and custom attributes

WWDC’21 brought new APIs for creating attributed strings. AttributedString is a new value type which provides a type-safe API for dealing with attributes, its also localizable, supports limited amount of Markdown syntax, and can be even archived and unarchived thanks to the Codable support. In this blog post, we’ll take a look at the new API and will compose some attributed strings. In addition to AttributedString type, there are many supporting types. For example, AttributeContainer is a collection of attributes which can be applied to the attributed string with one… Read more Exploring AttributedString and custom attributes