怎么用swiftui把字体调大

To adjust font size in SwiftUI, you can utilize Dynamic Type, which allows your app's text to automatically adjust to different sizes based on user preferences. Here's how you can do it:

Use Built-in Text Styles: Instead of setting a fixed font size, use system-provided text styles. For example, you can use the font modifier with a text style like .title or .body. This ensures that your text scales appropriately with the user's settings.
```
Text("Hello, World!")
    .font(.title)
```
Preview Dynamic Type in Xcode: You can test how your app looks with different text sizes using Xcode previews. Navigate to the preview canvas, click the variance button, and select dynamic type variants. This will generate previews for all text size variants.
Adjust Layouts for Larger Text: When using larger text sizes, you might need to adjust your layout to ensure readability. You can use the dynamicTypeSize environment keypath to adapt your layout dynamically.

For more detailed guidance, you can refer to the session Get started with Dynamic Type (03:11) from WWDC 2024, which covers how to scale text and use dynamic layouts effectively.