Implementing SwipeActions in SwiftUI: A Guide to Switching from .onDelete

Discover how to effectively transition from `.onDelete` to `.swipeAction` in SwiftUI, solve common issues, and enhance your list management experience.
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This video is based on the question https://stackoverflow.com/q/72635824/ asked by the user 'Michael' ( https://stackoverflow.com/u/14426684/ ) and on the answer https://stackoverflow.com/a/72635937/ provided by the user 'Asperi' ( https://stackoverflow.com/u/12299030/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Implementing SwipeActions in SwiftUI: A Guide to Switching from .onDelete

When working with lists in SwiftUI, developers often rely on the .onDelete method to enable deletion of items through swipe actions. However, as we look to create a more refined user experience, integrating .swipeAction has become increasingly popular. This guide will guide you through the process of transitioning to .swipeAction, while addressing common issues that arise, such as handling indexes and avoiding scope errors.

Understanding the Problem

The issue at hand is a common scenario where you have a ForEach loop managing a dynamic array, and in the past, you utilized the .onDelete method to facilitate item deletions. You aim to employ .swipeAction instead, intending to implement a slightly different approach without requiring the full swipe.

The challenge arises when trying to convert the logic from .onDelete, which uses an IndexSet, to the .swipeAction, which requires handling individual item indexes. Many users encounter errors like "Cannot find 'indexSet' in scope" when they attempt to make this switch.

Transitioning to .swipeAction

To implement .swipeAction, you will be replacing the .onDelete method in your existing ForEach loop. Here's how to achieve it:

Step 1: Modifying the ForEach Loop

In your initial code, you have something like this with .onDelete:

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

When switching to .swipeAction, we need to handle the deletion at a single index level. Here's how to adjust your code:

Step 2: Using Single Index in Button

Instead of relying on the indexSet, you directly specify the index of the item you wish to delete. Modify your existing swipe actions like so:

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

Explanation of the Code

value: In your ForEach, value represents the index of the current item in the scan2Clip.saveList.

Remove Action: The button's action will directly call remove(at: value), which removes the item at the specified index when the user swipes and taps the delete button.

Final Implementation Example

Here's how your overall List should appear after modifications:

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

Conclusion

Managing item deletions in SwiftUI is straightforward once you grasp the nuances of .swipeAction versus .onDelete. By following the steps outlined above, you can seamlessly transition your code, providing a more user-friendly interface with enhanced capabilities. Embrace these changes and don't hesitate to experiment with the features SwiftUI has to offer to make your apps more dynamic!