Скачать или смотреть How to Pass Data from ViewController to SwiftUI View

Struggling to pass data from your ViewController to a SwiftUI view? This guide walks you through the process of sharing parsed CSV data in an ARKit app.
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How to Pass Data from ViewController to SwiftUI View: A Step-by-Step Guide

When developing an iOS app that integrates ARKit, passing data between a traditional UIViewController and a SwiftUI view can be challenging. If you're facing issues in sharing data from your view controller, especially after parsing a CSV file—worry not! This guide will provide you with a clear solution so you can utilize the data in your SwiftUI views effectively.

Understanding the Problem

In the context of an app using ARKit to detect images, the goal is to display a SwiftUI view that varies based on which image is detected. Here’s the specific problem you might be encountering:

You're downloading a CSV file containing relevant data.

You parse this data within the viewDidLoad method of your ViewController.

Now, you need to pass this parsed data to your SwiftUI view to customize what is being displayed.

Let’s dive into how to achieve that.

Step-by-Step Solution

Step 1: Create a Property for the Parsed Data

To begin with, you need to create a new property in your ViewController to hold the parsed CSV data. This will allow you to access the data across your methods. Here’s how you do it:

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Step 2: Assign the Parsed Data

Next, once you have successfully parsed the CSV data in your closure, assign that data to the property you just created.

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Step 3: Pass the Data to Your SwiftUI View

With the data now stored in self.datos, you need to pass it to the SwiftUI view when you create it. Update your imageController method as follows:

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

Step 4: Update the SwiftUI View

Now that you are passing datos to your SwiftUI view, you will have to modify your SwiftUI view to accept this new property:

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

Step 5: Displaying the Data

Now, the ImageView struct can dynamically display the relevant data based on the detected image. It checks if datos is available and renders it accordingly.

Conclusion

By following these steps, you can successfully pass data from your UIViewController to a SwiftUI view. This opens up numerous possibilities for creating dynamic, data-driven interfaces in your iOS applications.

Recap of Key Steps:

Create a property to hold your data in the ViewController.

Assign data from your parsed CSV file to this property.

Pass the data to your SwiftUI view when creating it.

Make sure the SwiftUI view can accept and display the data.

With this guide, you're well on your way to seamlessly integrating your ARKit project with SwiftUI while keeping your data flowing where you need it.