Swiftui multiple previews g. But do you know all the ways or techniques to use these Previews? SwiftUI is the best choice for creating new apps, the preferred choice for visionOS apps, and required for watchOS apps. Jun 6, 2023 · If you want to preview your UIView or UIViewController, you need to wrap it as SwiftUI view with UIViewRepresentable or UIViewControllerRepresentable. SwiftUI previews allow you to look at your SwiftUI views inside Xcode without running the app in the simulator. Assuming you have a SwiftUI View named ContentView. Think of @EnvironmentObject as a smarter, simpler way of using @ObservedObject on lots of views. This guide covers everything a developer needs to know to maximize productivity gains using previews for UI development, testing, and collaboration Oct 14, 2019 · Working on a large iOS codebase often involves a lot of waiting. To create multiple previews for a single SwiftUI View, create a Struct that uses a PreviewProvider protocol and within its previews static var, return a group of Views. For SwiftUI previews you can now easily see your view in different variations such as color scheme, orientation, and Feb 24, 2024 · SwiftUI – Hacking with Swift forumsI have been doing some older tutorials on the web and noticed how some coders "shrink" the Preview window (s) to only show the exact content in a View. The default preview that shows when we create a new SwiftUI view is already amazing as it allows us to quickly change things like the color scheme, orientation May 4, 2023 · How to open Preview in Xcode Basic Usages What is Xcode Preview Xcode Preview was a feature in Xcode that can generates previews for a SwiftUI view, UIView, or UIViewController without a need to build and run the whole app. This needs to be provided with the exact name of a device as seen in Xcode’s destination menu, e. This week, we will talk about enhancing Previewable and PreviewModifier types, allowing us to build reusable preview environments. Find out how to preview multiple files at once, how to manage data flow for previews, and how to use sample data while previewing. Nov 26, 2024 · The power of previews in Xcode 26 Nov 2024 Previews in Xcode become more powerful every year. As an example, here's a When you use SwiftUI previews during development, you can quickly create apps that are more flexible and maintainable. dark) } } If you want to see both light and dark mode side by side, place multiple previews in a group, like this: Create a new Xcode project that uses SwiftUI. In Xcode 15, we can easily create previews with new and more concise syntax using the #Preview macro. Multiple Configurations: Test different Jun 11, 2024 · SwiftUI Jul 08, 2024 • 2 min read @Previewable: Dynamic SwiftUI Previews Made Easy Xcode 16 introduced the @Previewable macro for SwiftUI Previews, allowing you to use dynamic properties inline in previews. Jun 15, 2022 · This year at WWDC22 there was an awesome developer feature announced for Xcode. Instead of having to start the simulator we can now create custom views and see them in the preview with the content staying up-to-date as we make changes. Enhance your development workflow with Xcode show preview for SwiftUI and UIKit views. However, within Xcode’s Preview feature, such groups are treated in a special way, as the system will create a separate preview for each group member — which in turn enables us to easily preview multiple view configurations Nov 13, 2024 · Xcode 16 introduced the Previewable macro, making it easier to preview SwiftUI views with bindings. Discover why previews crash & how to fix it. Learn how it works via derived code, dynamic replacement, and XPC. This tutorial is based on our Localization tutorials linked below. xcassets, to create rich and efficient UI previews. This speeds up development but where do you keep your preview data? If you’re not careful your view code can become cluttered with sample data. From providing multiple previews and setting dynamic layouts to offering various contexts and localization support, it’s a powerful tool in a SwiftUI developer’s toolkit. You use one of the preview macros — like Preview(_:body:) — to tell Xcode what to display. For more information about Xcode templates, see Creating an Xcode project for an app. Mar 12, 2025 · Multiple Device Previews: SwiftUI Previews lets you view your UI from the perspective of many different devices and screen sizes at the same time. Its declarative programming model and approach to interface construction makes it easier to create and maintain your app’s interface on multiple platforms simultaneously. Can anyone help me with the steps to achieve that? Sep 12, 2023 · What is Multiple Preview? Multi Preview in Xcode is a powerful feature that allows developers to simultaneously preview multiple states or variations of a SwiftUI view within the Xcode interface. Add a preview macro to your interface file When you Jun 27, 2023 · Using the #Preview Swift Macro you can create previews more quickly for all your SwiftUI, UIKit, and AppKit views. Includes tips on data management for previews. previewDevice() modifier. When I add multiple Buttons, or multiple Texts, it creates two separate previews, but when I run the Dec 16, 2023 · Mastering Previews in SwiftUI 5 & iOS 17 In SwiftUI, a preview is a real-time, interactive representation of our user interface (UI) that is displayed in Xcode’s design canvas. Feb 18, 2025 · One of the best features of SwiftUI Previews is the ability to show multiple variations of your design. We can specify an array of devices and create preview in each of the device like this : # if DEBUG import SwiftUI @available (iOS 13, *) struct InfoVCPreview: PreviewProvider { static var devices = ["iPhone SE", "iPhone 11 Pro Max"]. Features Sep 19, 2024 · How to use SwiftUI previews with SwiftData If you’ve ever used SwiftData in your projects, you might have found it challenging to use SwiftUI previews effectively. I am just following apple's SwiftUI tutorial. Apr 16, 2025 · To use SwiftUI Previews effectively, developers should create multiple previews for different states of a view. Sep 27, 2023 · I couldn't find a way to preview my SwiftUI views on multiple devices using the new XCode 15's #Preview macro. If you include more than one preview in a source file, the canvas provides controls that enable you to select which to display when that source file is active. Preview Data The tight integration Xcode provides between the declaration of a SwiftUI view and its preview gives you fast feedback as you Aug 28, 2021 · Explore reasons for SwiftUI preview crashes with Core Data, learn to avoid them, and reliably preview views in Xcode. ---This video is based on th Mar 10, 2021 · Mastering SwiftUI previews 10 Mar 2021 This week, I want to talk about one of the most powerful Xcode features, SwiftUI previews. Oct 3, 2023 · # Preview is a new macro in SwiftUI, which displays live preview in swiftUI without having to run the simulator each time you make a change in the view. You can also preview UIKit views and controllers by wrapping them in SwiftUI. For example: Mar 21, 2021 · My SwiftUI preview is showing one view as 3 different preview screens and it should be one screen with the combined views What am I doing wrong? Thank you! See images attached of 3 separate prev Feb 25, 2020 · Xcode’s SwiftUI preview shall we us display our designs in multiple screen sizes at the identical time the usage of the . It was working with XCode 14 and was showing side-by-side previews on the canvas, each For more information about Xcode templates, see Creating an Xcode project for an app. 0 (15A240d) IOS 17 Workstation - MacBook Pro 14 inch 2021 with M1 Pro CPU Summary: I have been using the Observable Object protocol with no issues, including previews. This is useful when creating responsive layouts or testing different themes. What if you then want to Snapshot these previews so that you can make sure that future changes don’t break existing views? Let’s walk through one way of doing this. Explore the canvas, previews, and the SwiftUI template code. Sep 1, 2024 · Xcode Previews utterly transform how iOS and iPadOS developers build world-class app user interfaces. Sep 13, 2021 · The data is provided in a static array ion DailyScrum. 4 For data that should be shared with many views in your app, SwiftUI gives us the @EnvironmentObject property wrapper. Today we will learn about all the powerful features of previews in Xcode. Apr 6, 2020 · Today I learned that you can actually create multiple Xcode screen previews in SwiftUI. Jun 21, 2019 · I know we can open multiple previews of different screens at the same time in SwiftUI. When you create a custom View with SwiftUI, Xcode can display a preview of the view’s content that stays up-to-date as you make changes to the view’s code. “iPhone 14”. Previews in Xcode are not about SwiftUI; you can use them even with UIKit. The canvas labels the different previews with the line number where the preview appears in source. This means your design can be made to fit well across a wide range of iOS devices, including iPhones and iPads with various screen sizes, and even in different orientations. The problems is definitely due to the lack of conformance to Identifiable, but I wonder if there is a way to achieve the same result by creating a Group from multiple previews in a for loop or ForEach without the Identifiable constraint. SwiftUI is deeply integrated into Xcode, making it almost trivial to build user interfaces using SwiftUI. But Apple didn't stop there. Perfect for enhancing productivity in iOS projects. Add previews to your SwiftUI, UIKit, and AppKit views using the preview macro. Sep 26, 2023 · Learn how to use Xcode Preview: Show, edit, and preview SwiftUI code seamlessly. I have managed to workout how to do the same, but they appear to be able to go one step further than me. To preview multiple localizations, add additional previews to your code and set the locale environment value for each. It may be an xCode change as they are not necessarily using xCode 15 in the older videos, as I am now While PreviewProvider is primarily used for generating quick previews of SwiftUI views, its utility extends much beyond that. Assemble your app’s core content When someone launches your app, your app needs to initialize itself May 9, 2024 · SwiftUI Previews allow you to generate the view as its being developed. You typically specify one of your app’s custom views and optionally any inputs, model data, modifiers, and enclosing views that the custom view needs for normal operation. The localizations appear in the SwiftUI preview. Aug 31, 2020 · One of the great features of SwiftUI is the Xcode support for previewing views without launching the simulator. Xcode Preview was introduced at the same time when Apple introduced the SwiftUI framework in WWDC 2019. In the PreviewProvider, create a Group and init multiple ContentView () children inside of it. But now with Sep 30, 2023 · Updated for Xcode 16. To better identify the previews in the canvas, you can give them names. A ViewBuilder that produces a SwiftUI view to preview. Learn how to efficiently display multiple previews for your card views in SwiftUI using the `ForEach` construct with test data. For more details about adding previews, see Previewing your app’s interface in Xcode. Feb 4, 2022 · 1 I noticed that I can do this: struct HomeView_Previews: PreviewProvider { static var previews: some View { HomeView() HomeView() HomeView() } } The type is some View, which is a single view. This lets us share model data anywhere it’s needed, while also ensuring that our views automatically stay updated when that data changes. But with Xcode 11, our wait is finally over — and it’s all thanks to SwiftUI. Dec 17, 2024 · Xcode does weird things with to make SwiftUI previews possible, especially with #Preview. ---This video is based on the May 18, 2021 · Visual Setup Being able to display side-by-side previews means that we don’t need to scroll through multiple previews to confirm our changes didn’t introduce regressions on different color schemes or layout directions. This wishes to be supplied with the exact name May 23, 2023 · Explore SwiftUI preview's mechanism and limitations. preferredColorScheme(. May 30, 2025 · For example, this shows a preview using dark mode: struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView(). May 24, 2020 · Just like standard SwiftUI views, multiple preview views can be grouped into a single container using the Group API. This practice allows for comprehensive testing of UI components under various conditions, such as light and dark modes, different device sizes, and specific data inputs. However, if you want some sample model data you need to tread a little more carefully, including creating your data using an in-memory data store. For example, it generates an arbitrarily named macro at the global scope without declaring any names on the macro declaration and the new structure is hidden from user code - Xcode takes any preview-code and handles it separately, but only if it's written in an expected place within the raw file/AST May 30, 2025 · Xcode’s SwiftUI preview lets us show our designs in multiple screen sizes at the same time using the . This is particularly helpful with rows of a List as the List will also show those views with the correct list styling and metrics. The API is intuitive and the framework's learning curve is gentle. 4 SwiftData makes basic Xcode previews trivial, because they work immediately as long as you don't try to insert any data – any properties created using the @Query macro will quietly return no results. The more previews you can fit, the less likely you are to overlook UI inconsistencies. Introduced in Xcode 11 as part of the new SwiftUI framework, previews provide an interactive design environment right within the Xcode editor. You’ll be able to make richer and more dynamic previews of your SwiftUI views without the need to wrap any state inside child views. Jun 11, 2025 · You might already be able to use SwiftUI Previews, and now it can even be used to preview UIKit. Rather than In today's video I show you some basic tips and tricks to help you utilize SwiftUI Previews. This is super helpful as it allows you to quickly customize the previews with different settings to verify the view responds correctly. Display the SwiftUI preview To show the preview, select a file that contains a preview macro in the Project navigator and, if necessary, choose Editor > Canvas to show the SwiftUI's declarative syntax makes it straightforward to describe the user interface you have in mind. Why can I return 3 HomeView s here? (I don't think this is inside a resultBuilder block because it's clearly a getter function body here, or am I wrong?) Dec 1, 2022 · Updated for Xcode 16. May 19, 2024 · Why Use SwiftUI Previews? SwiftUI Previews provide several benefits: Immediate Feedback: See the results of your changes instantly without running the app. Now we can show multiple previews in the May 4, 2024 · No. Oct 14, 2025 · Learn practical techniques for SwiftUI Previews to speed up interface iteration, reduce build times, and visualize app changes instantly. Overview With Swift previews, you can make changes to your app’s views in code, and see the result of those changes quickly in the preview canvas. PreviewDevice () modifier. SwiftUI previews Jan 12, 2023 · Since the introduction of SwiftUI Previews have been one of the biggest updates. To preview and interact with views from the canvas in Xcode, and to use all the latest features described throughout the tutorials, ensure your Mac is running macOS Sonoma or later. Apr 14, 2020 · SwiftUI Previews can be used to display a view in dark mode, different localizations, different text sizes, all at the same time! Oct 21, 2024 · In this article, we’ll explore how to effectively use SwiftUI’s Preview Content, including the Preview Content group and Preview Assets. By annotating dynamic properties like @State in a #Preview body with @Previewable, we can pass them as bindings to views directly. Jun 13, 2023 · If I wanted to create a preview for a SwiftUI view that contains a @Binding I would have previously written something like this: struct SpecialButton_Preview: PreviewProvider { static var previ Creates a preview of a SwiftUI view. Dec 21, 2022 · Learn how to create interactive previews for SwiftUI views that make use of @Binding Oct 27, 2023 · SwiftUIPreviewLayouts is a Swift package for generating multiple SwiftUI previews for various device layouts and multitasking modes, specifically for iOS. For example if your Learn how to effectively utilize the `# Preview` macro in Xcode 15 to showcase multiple variants of your SwiftUI views with ease. Discover ways to improve the preview experience by making small tweaks to your project. Dec 20, 2020 · I am working with SwiftUI and wrote the following example to present an issue I'm experiencing. Then configure how you want your previews to display using the preview canvas controls, or programmatically in code. 1: Preview multiple behaviors of your app We normally use one preview to visualize the current view we are working on, but you can create as many previews as you need for the same view! Why is that useful? Well, let's see the following example: Nov 14, 2024 · A single #Preview is helpful for quickly showing what your app will look like on a single device, and switching to another device is relatively easy with the menu at the bottom of the preview pane, but often, it is easier to define more than one preview as follows: SwiftUI lets you define many previews as seen above. Display the SwiftUI preview To show the preview, select a file that contains a preview macro in the Project navigator and, if necessary, choose Editor > Canvas to show the Oct 1, 2023 · Xcode Version 15. Keyboard shortcuts, Accessibility Inspector, multiple previews with various attributes for testing and Jun 7, 2020 · Previewing multiple devices It would be handy if we can preview how our UI looks like in multiple devices at once. Sep 24, 2022 · Second, for multiple previews of the same view but with different inputs, you can make a single preview of a List or VStack that contains those different configurations.