Скачать или смотреть SwiftUI: Switching Views with NavigationView Made Easy

Learn how to switch views in SwiftUI using NavigationView effectively. This guide provides step-by-step instructions for implementing a comments feature in your app.
---
This video is based on the question https://stackoverflow.com/q/68248282/ asked by the user 'BubH' ( https://stackoverflow.com/u/16257854/ ) and on the answer https://stackoverflow.com/a/68249547/ provided by the user 'lorem ipsum' ( https://stackoverflow.com/u/12738750/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: SwiftUI - Switching views with NavigationView

Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/l...
The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license.

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---
SwiftUI: Switching Views with NavigationView Made Easy

When developing an app using SwiftUI, managing and navigating between different views is crucial for creating a seamless user experience. If you’ve ever found yourself needing to switch views but faced issues with layout glitches or empty screens, you’re not alone. In this guide, we’ll tackle a common scenario: switching from a PostView to a CommentView while overcoming typical challenges encountered with SwiftUI's NavigationView.

Problem Overview

The Scenario

Imagine you are building a social media app where users can view posts and leave comments. You have two key views:

PostView: Displays a list of posts.

PostRow: A single post entry that includes a button for navigating to the comments on that specific post.

As you attempt to implement a button in your PostRow to switch to a CommentView, you might run into issues:

Adding NavigationView to PostRow leads to failed loading of posts.

Placing NavigationView in PostView can result in visual glitches.

This confusion stems from the SwiftUI's view management and state handling. The good news is, there is a structured approach that you can follow to resolve these issues.

Solution: Implementing View Switching

Step 1: Define Enum for View Types

First, we will define an enumeration that will represent the different views in your app.

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

This enum helps in categorizing the views you want to switch between.

Step 2: Create ParentView for Navigation Management

Next, create a ParentView that will manage which view to currently display based on user interaction.

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

@ SceneStorage: This property wrapper allows the view to retain the state even when the view is reloaded, making it a perfect choice for navigation.

Step 3: Create the Comments View

Within your ParentView, handle the display of the comments.

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

This view allows going back to the posts directly, enhancing navigation for the user.

Step 4: Implement the Posts View

Now, let’s implement the view where posts are displayed.

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

Step 5: Create PostRow View with Navigation Button

Finally, let’s create the PostRow where the button to navigate to comments is placed.

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

Step 6: Preview Your Parent View

Don’t forget to include a preview of your ParentView to see if it works as expected!

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

Conclusion

By organizing your code this way, you can effectively switch between views in your SwiftUI app without encountering issues related to navigation and layout. The use of @ SceneStorage allows for maintaining the state, and the enum clearly separates view types, making your code cleaner and more manageable.

Feel free to experiment with this approach to enhance your app’s navigation flow and user experience!