Interpolate text with custom foreground style in SwiftUI

SwiftUI lets us style portions of text by interpolating Text inside another Text and applying available text modifiers, such as foregroundColor() or font().

Starting from iOS 17 we can apply more intricate styling to ranges within a Text view with foregroundStyle().

For example, we can color a word with a gradient.

Screenshot of hello world text where world is colored with linear gradient

struct ContentView: View {
    let gradient = LinearGradient(
        colors: [.blue, .green],
        startPoint: .leading,
        endPoint: .trailing
    )
    
    var body: some View {
        Text("Hello, \(Text("world").foregroundStyle(gradient))!")
            .bold()
            .font(.title)
            .textCase(.uppercase)
    }
}

And if you are interested in more advanced text styling, you can take a look at the new ShaderLibrary. In iOS 17 Metal shaders get automatically converted to ShapeStyles that then can be passed to foregroundStyle().

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