Expose custom views and modifiers in the Xcode library.
15 types
20 callable entries
7 skipped
74% entry coverage
Generated from iOS SDK 27.1. Availability is shown on each declaration; permissions and entitlements still apply.
ColorResource
struct · iOS 17.0+
ImageResource
struct · iOS 17.0+
LibraryContentBuilder
struct · iOS 14.0+
LibraryContentProvider
protocol · iOS 14.0+
LibraryItem
struct · iOS 14.0+
LibraryItem.Category
struct · iOS 14.0+
Preview
struct · iOS 17.0+
Preview.ViewTraits
enum · iOS 17.0+
PreviewArguments
struct · iOS 26.0+
PreviewBodyBuilder
struct · iOS 18.0+
PreviewLayout
enum · iOS 13.0+
PreviewMacroBodyBuilder
struct · iOS 17.0+
PreviewRegistry
protocol · iOS 17.0+
PreviewTrait
struct · iOS 17.0+
PreviewUnavailable
struct · iOS 17.0+
static fixedLayout(width: number, height: number): Promise<PreviewTrait<Preview_ViewTraits>>@MainActor static func fixedLayout(width: CGFloat, height: CGFloat) -> PreviewTrait<T>Center the preview in a fixed size container with the given dimensions. This is the same as ``PreviewLayout/fixed(width:height:)``.
static get defaultLayout(): Promise<PreviewTrait<Preview_ViewTraits>>@MainActor static var defaultLayout: PreviewTrait<Preview.ViewTraits> { get }Center the preview in a container the size of the device on which the preview is running. This is the same as the ``PreviewLayout/device`` layout, and is the default if you don't specify a layout trait.
static get landscapeLeft(): Promise<PreviewTrait<Preview_ViewTraits>>@MainActor static var landscapeLeft: PreviewTrait<Preview.ViewTraits> { get }The device is in landscape mode, with the top of the device on the left. This is the same as <doc://com.apple.documentation/documentation/SwiftUI/InterfaceOrientation/landscapeLeft>.
static get landscapeRight(): Promise<PreviewTrait<Preview_ViewTraits>>@MainActor static var landscapeRight: PreviewTrait<Preview.ViewTraits> { get }The device is in landscape mode, with the top of the device on the right. This is the same as <doc://com.apple.documentation/documentation/SwiftUI/InterfaceOrientation/landscapeRight>.
static get assistiveAccess(): Promise<PreviewTrait<Preview_ViewTraits>>@MainActor static var assistiveAccess: PreviewTrait<Preview.ViewTraits> { get }Apply the visual style used in Assistive Access on iOS and iPadOS. On other platforms, this is a no-op.
static get portraitUpsideDown(): Promise<PreviewTrait<Preview_ViewTraits>>@MainActor static var portraitUpsideDown: PreviewTrait<Preview.ViewTraits> { get }The device is in portrait mode, but is upside down. This is the same as <doc://com.apple.documentation/documentation/SwiftUI/InterfaceOrientation/portraitUpsideDown>.
static get sizeThatFitsLayout(): Promise<PreviewTrait<Preview_ViewTraits>>@MainActor static var sizeThatFitsLayout: PreviewTrait<Preview.ViewTraits> { get }Fit the container to the size of the preview when offered the size of the device that the preview is running on. This is the same as ``PreviewLayout/sizeThatFits``.
static get portrait(): Promise<PreviewTrait<Preview_ViewTraits>>@MainActor static var portrait: PreviewTrait<Preview.ViewTraits> { get }The device is in portrait mode, with the top of the device on top. This is the same as <doc://com.apple.documentation/documentation/SwiftUI/InterfaceOrientation/portrait> and is the default orientation if you don't specify one.
static buildBlock(content: unknown): unknownstatic func buildBlock(_ content: Content) -> Contentstatic buildBlock(arg0: unknown): unknownstatic func buildBlock(_: Content) -> Content7 declarations were excluded from these bindings. Each reason comes from the generator or the iOS SDK compiler.
LibraryItem.init(_:visible:title:category:matchingSignature:)
callback cannot propagate synchronous failure
LibraryContentBuilder.buildBlock(_:)
A variable number of Swift arguments is not supported.
LibraryContentProvider.modifiers(base:)
The iOS SDK compiler rejected this binding: cannot access associated type 'ModifierBase' from 'LibraryContentProvider'; use a concrete type or generic parameter base instead
PreviewRegistry.preview
Static protocol requirements cannot be called through an instance.
PreviewTrait.init(_:)
A variable number of Swift arguments is not supported.
protocol implementation LibraryContentProvider
This protocol needs associated types that cannot yet cross the bridge.
protocol implementation PreviewRegistry
non-method protocol requirement