body

Declaration

@AttributedTextFormatting.DefinitionBuilder<Self.Scope> var body: Self.Body { get }

Discussion

When you implement a custom definition, you must implement a computed body property to provide the constraints of your definition. Return a definition that’s composed of built-in definitions that SwiftUI provides, such as AttributedTextFormattingDefinition.ValueConstraint and AttributedTextValueConstraints, plus other composite AttributedTextFormattingDefinitions that you’ve already defined:

struct MyTextFormattingDefinition: AttributedTextFormattingDefinition {
    var body: some AttributedTextFormattingDefinition<
        AttributeScopes.SwiftUIAttributes
    > {
        ValueConstraint(
            for: \.underlineStyle,
            values: [nil, .single],
            default: .single)
        MyAttributedTextValueConstraint()
    }
}

Note that the order of the constraints in the result builder matters as constraints are applied in order. For details, see AttributedTextValueConstraint/constrain(_:)-(Attributes).