Скачать или смотреть Mastering SwiftUI NavigationLink: Swipe Drag without Color Change

Discover how to prevent NavigationLink color changes during swipe drag gestures in SwiftUI, enhancing user experience in your apps.
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This video is based on the question https://stackoverflow.com/q/65206356/ asked by the user 'TheTwoNotes' ( https://stackoverflow.com/u/546237/ ) and on the answer https://stackoverflow.com/a/67193529/ provided by the user 'Kevin M. Womack' ( https://stackoverflow.com/u/15717753/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Mastering SwiftUI NavigationLink: Swipe Drag without Color Change

If you’re working on a SwiftUI application and want to allow users to swipe left or right to change views without unintentionally triggering NavigationLink color changes, you’re in the right place. This guide will walk you through the problem of unwanted UI behaviors in your navigation experience and present a practical solution to resolve it.

The Challenge: NavigationLink Behavior During Swipe Gestures

In SwiftUI, NavigationLink is a widely used component that allows us to navigate between different views seamlessly. However, when implementing swipe gestures, you may encounter an issue where the NavigationLink changes color as if it has been pressed. This can disrupt the user experience, especially when they are dragging or swiping to navigate between different views.

Here’s a quick rundown of the behavior observed:

When starting a swipe gesture on the outer view over a NavigationLink, the link momentarily changes color.

Continuing the drag does update the underlying view correctly, but the link’s state return to normal after the drag, which can be confusing for users.

The Solution: Manage Swipe Gestures and Disable Link Interaction

To tackle this problem, we can use a combination of @ State variables to manage our view’s states and conditions. Here’s how we can approach this solution effectively.

Step 1: Define State Variables

We will introduce some state variables to track the dragging state and whether the drawer is open. This will help us control the behavior of the swipe gesture.

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Step 2: Create a Conditional Offset

By scripting an offset that depends on whether a drawer row (or a similar component) is open, we can reduce the complexity of handling gestures.

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Step 3: Disable Navigation Link During Dragging

Using a .disabled() modifier, we can ensure that the NavigationLink doesn’t respond to user interactions while dragging is in progress. This is achieved by appending the following line to your NavigationLink:

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Complete Example

Here’s a cohesive example that incorporates these modifications:

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Conclusion

By implementing the above strategies, you can prevent NavigationLink color changes during drag gestures, enhancing the overall user experience. This solution is somewhat hacky, but it provides a practical way to achieve the desired effect with minimal effort.

Good luck with your app development, and feel free to experiment with these concepts in your own SwiftUI projects!