Скачать или смотреть How to Fix Can't Add Stroke to Shape in SwiftUI Error

Learn how to resolve the error when trying to add a dashed stroke to a Rectangle in SwiftUI. This guide provides a clear solution with code examples for better understanding.
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This video is based on the question https://stackoverflow.com/q/75611817/ asked by the user 'blabus' ( https://stackoverflow.com/u/187980/ ) and on the answer https://stackoverflow.com/a/75612038/ provided by the user 'workingdog support Ukraine' ( https://stackoverflow.com/u/11969817/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Understanding the Issue: Stroke in SwiftUI

SwiftUI is a powerful framework for building user interfaces across all Apple platforms. However, like any tool, it has its quirks and sometimes can produce errors that can be a bit confusing. One common issue that developers face is the inability to add a stroke to a shape, specifically when working with rectangles.

In this post, we'll explore the problem you encountered when trying to add a dashed stroke to a Rectangle. The error message reads:

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

This can be perplexing, especially if you assume that Rectangle is a type of Shape. Let’s break down a solution to this issue.

Solution: Properly Adding Stroke and Fill to a Rectangle

To achieve both a dashed stroke and a fill color for your rectangle, you can use a different approach than what you initially attempted. Here’s the corrected code to include both the stroke and fill attributes effectively:

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

Breakdown of the Code

Stroke Border:

.strokeBorder(style: StrokeStyle(lineWidth: 4, dash: [15.0])): This line is used to add a border (stroke) to the Rectangle. The StrokeStyle parameter allows you to set the lineWidth and define the dash pattern.

Corner Radius:

.cornerRadius(4): This method rounds the corners of the rectangle, providing a smoother visual appearance.

Background Fill:

.background(Rectangle().fill(Color("Dark Gray"))): Since strokeBorder also applies to the shape itself, we need to set a separate background color. This line creates another Rectangle and fills it with Dark Gray.

By organizing your code this way, you effectively use SwiftUI’s capabilities to add both visual elements to your Rectangle, avoiding the compilation error you faced earlier.

Conclusion

If you encounter issues adding strokes to shapes in SwiftUI, remember that separating the fill and stroke components into distinct layers is often the solution. By using the background modifier wisely, you can create visually appealing UI elements while avoiding compiler errors like the one shown.

Now you are ready to create custom shapes in your SwiftUI applications without running into errors. Happy coding!