Скачать или смотреть Resolving Animation Deprecation Issues in SwiftUI with iOS 15

Learn how to adapt your SwiftUI animations to comply with iOS 15's changes. Discover how to properly implement animations with the new `.animation(value:)` method and resolve common issues.
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This video is based on the question https://stackoverflow.com/q/74150051/ asked by the user 'Francesco5177' ( https://stackoverflow.com/u/20012717/ ) and on the answer https://stackoverflow.com/a/74150110/ provided by the user 'grandsirr' ( https://stackoverflow.com/u/14865215/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Resolving Animation Deprecation Issues in SwiftUI with iOS 15: A Comprehensive Guide

SwiftUI has made remarkable progress in revolutionizing the way we build user interfaces across Apple platforms. However, with the release of iOS 15, certain methods, including animation, have been deprecated, causing confusion among developers. In this article, we will discuss the deprecation of the .animation() method and guide you through the proper usage of the new method, ensuring your animations remain smooth and visually appealing.

The Problem: Deprecation of .animation()

With iOS 15, the use of .animation() for adding animations in SwiftUI has been officially deprecated. If you attempt to use it like this:

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

you will see an error message indicating that it is no longer valid. Instead, Apple now encourages developers to use the updated .animation(value:) method. This can be confusing, especially when it comes to knowing what value needs to be passed to trigger the animation.

Example Scenario

Imagine you have a gallery view where images are displayed, and you want them to animate when a user interacts with a slider. Before iOS 15, you could easily apply the .animation() method to accomplish this. However, now you need to adapt your code:

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

This line will trigger an error, creating a frustrating obstacle in your development process.

The Solution: Updating to .animation(value:)

Step 1: Identify the Trigger Value

The key insight is that the new .animation(value:) method requires a Binding that will trigger the animation when it changes. Typically, this is a state variable driven by user interactions—like your selected animal or the grid layout itself.

For your specific case with the selectedAnimal, your animation should be structured like this:

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

This ensures that when selectedAnimal changes, the associated animation will activate automatically.

Step 2: Handling Animatable Arrays

If you want your grid layout to animate as well, you will need to tackle it a bit differently. Arrays are not inherently animatable in SwiftUI, which means you need to make some adjustments to your code. To make the grid layout animatable, follow these modifications:

Remove the Deprecated Animation: Delete the previous .animation() line from your code.

Update the gridSwitch Function: This function is critical as it governs how your grid update animations behave. Here’s the revised function:

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

Why This Works

The modification with isGridChanged prevents a bug where your images unexpectedly scale down upon view initialization. By using withAnimation, you make sure that changes to the grid layout are visually animated only after the initial change has been made.

Conclusion

Adapting to the changes brought by iOS 15 can initially be challenging, especially when it comes to animation methods in SwiftUI. However, by understanding the new .animation(value:) approach and implementing the correct structure, your animations can continue to provide a smooth user experience. Embrace these updates and enhance your applications by starting to implement the newer animation methods today.

Remember, keeping up with platform changes is crucial in the ever-evolving world of software development. Happy coding!