AttributedTextFormatting.ValueConstraint

struct · iOS 26.0+ · SDK 27.1

struct ValueConstraint<Scope, AttributeKey> where Scope : AttributeScope, AttributeKey : AttributedStringKey, AttributeKey.Value : Sendable

A text formatting definition that constrains the value of a single attribute to the members of a set. struct MyTextFormattingDefinition: AttributedTextFormattingDefinition { var body: some AttributedTextFormattingDefinition< AttributeScopes.SwiftUIAttributes > { // Allow no underline or the `.single` underline style. If // a text has any other underline style, it is corrected // to the default value `.single` ValueConstraint( for: \.underlineStyle, values: [nil, .single], default: .single) } }

Members (0)

This type has no directly callable members in this snapshot. See the framework’s skipped declarations for unsupported APIs.

All SwiftUICore types →