Скачать или смотреть How to Conditionally Display Views in SwiftUI for Users on iOS 14

Learn how to show different views based on the user's iOS version using SwiftUI. Display specific content for users on iOS 14 and provide alternatives for other versions.
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This video is based on the question https://stackoverflow.com/q/65335960/ asked by the user 'Tanvirgeek' ( https://stackoverflow.com/u/14733367/ ) and on the answer https://stackoverflow.com/a/65336100/ provided by the user 'YodagamaHeshan' ( https://stackoverflow.com/u/9440709/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Displaying Different Content Based on iOS Version in SwiftUI

In the world of app development, ensuring a tailored user experience based on the device and its operating system is paramount. If you're working with SwiftUI and want to provide a specific user interface for those on iOS 14, while showing something else for users on other versions, this post will guide you through the solution.

The Problem

Imagine you are developing an iOS app that welcomes users differently based on their operating system version. For users on iOS 14, you'd like to display a specific message, for instance:

[[See Video to Reveal this Text or Code Snippet]]

Conversely, for users on other versions of iOS, your app should present a different message, such as:

[[See Video to Reveal this Text or Code Snippet]]

So, how can you implement this conditionally in SwiftUI? Let's explore the solution.

The Solution Explained

To display different views based on the iOS version, you can utilize the UIDevice class to check the current system version. Below, we'll break down the solution into easy-to-follow steps.

Step 1: Accessing the System Version

Swift provides a simple way to access the system version through UIDevice.current.systemVersion. This property returns a string that represents the version number of the current iOS device.

Step 2: Implementing the Conditional Logic

Here's how you can set up your SwiftUI view to conditionally display the Text based on the iOS version:

[[See Video to Reveal this Text or Code Snippet]]

Step 3: Explanation of the Code

struct ContentView: View: This defines your main view structure where you’ll specify how to render your content.

var systemVersion: This variable captures the current device's system version as a string.

var body: some View: This computed property constructs the view. It determines which Text view to show based on the system version.

if systemVersion.starts(with: "14"): This condition checks if the system version begins with "14". If it does, it shows the welcome message for iOS 14 users; otherwise, it presents the alternative message.

Conclusion

By setting up these conditions in your ContentView, you effectively customize your app's user interface for different iOS versions. This approach not only enhances user experience but also aligns your content with the capabilities and features of specific iOS versions.

Implementing such conditional display logic in your SwiftUI applications will ensure that your users feel welcomed and appropriately engaged, no matter what version they are using. Happy coding!