How to Display Your SpriteKit Score in a SwiftUI View

Описание: Discover how to effectively overlay game scores from `SpriteKit` onto your `SwiftUI` views, utilizing `ObservableObject` for seamless integration.
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This video is based on the question https://stackoverflow.com/q/70084341/ asked by the user 'Norbert' ( https://stackoverflow.com/u/12262821/ ) and on the answer https://stackoverflow.com/a/70084658/ provided by the user 'ios coder' ( https://stackoverflow.com/u/13899957/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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How to Display Your SpriteKit Score in a SwiftUI View

When building games with SpriteKit, effectively managing the score display can be somewhat challenging, especially if you're also using SwiftUI for your user interface. Many developers want to show game scores on their SwiftUI views rather than directly on the SpriteKit scene. If you're facing this challenge, you're not alone.

In this guide, we will guide you through the process of integrating SpriteKit score management with a SwiftUI view. By the end of this post, you'll have a cleanly structured solution to display your game score in real-time.

The Problem

You have a game using SpriteKit, and you want to show the player's score in a SwiftUI view instead of inside the game scene itself. You currently have a ZStack in SwiftUI that displays the score, but it does not update as the game progresses. The issue arises because the score is managed within the SpriteKit game scene without proper communication to the SwiftUI view.

The Solution

To bridge this gap, we will use the ObservableObject protocol in Swift. This allows us to create a score that may be observed by our SwiftUI view. Here’s how to implement this solution step by step.

Step 1: Modify the GameScene Class

First, let's modify your GameScene class to conform to the ObservableObject protocol. This will allow us to publish changes in the score.

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Step 2: Update the PageTwo View

Next, update your PageTwo SwiftUI view to use an instance of GameScene as an @ StateObject. This way, your view can respond to updates in the score.

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

Step 3: Testing Your Implementation

With these changes in place, you can now run your app. The score should display in the SwiftUI overlay. To increase the score, simply tap on the score text, which calls the addScore() function in your GameScene, updating the gameScore variable.

Conclusion

By using ObservableObject in combination with a SwiftUI view, you've successfully displayed a real-time score from your SpriteKit game. This not only allows for a better visual experience but also keeps your game logic clean and manageable.

If you encounter more complex interactions between SpriteKit and SwiftUI, consider exploring other SwiftUI state management techniques, like EnvironmentObject or even state variables for a more robust architecture. Happy coding!