Structure

PreviewDevice

A simulator device that runs a preview.

Declaration 宣言 

struct PreviewDevice

Overview 概要

Create a preview device by name, like “iPhone X”, or by model number, like “iPad8,1”. Use the device in a call to the previewDevice(_:) modifier to set a preview device that doesn’t change when you change the run destination in Xcode:


struct CircleImage_Previews: PreviewProvider {
    static var previews: some View {
        CircleImage()
            .previewDevice(PreviewDevice(rawValue: "iPad Pro (11-inch)"))
    }
}

You can get a list of supported preview device names by using the xcrun command in the Terminal app:


% xcrun simctl list devicetypes

Additionally, you can use the following values for macOS platform development:

  • “Mac”

  • “Mac Catalyst”

Topics 話題

Creating a Preview Device プレビューデバイスを作成する

init(extendedGraphemeClusterLiteral: Self.StringLiteralType)
Creates an instance initialized to the given value. 与えられた値に初期化されるインスタンスを作成します。
Available when ExtendedGraphemeClusterLiteralType is Self.StringLiteralType.
init(unicodeScalarLiteral: Self.ExtendedGraphemeClusterLiteralType)
Creates an instance initialized to the given value. 与えられた値に初期化されるインスタンスを作成します。
Available when ExtendedGraphemeClusterLiteralType is Self.UnicodeScalarLiteralType.
init(stringLiteral: String)
Creates an instance initialized to the given string value.
init(rawValue: String)
Creates a new instance with the specified raw value. ある新しいインスタンスをこの指定された生の値で作成します。
let rawValue: String
The corresponding value of the raw type. 生の型の対応している値。
typealias RawValue
The raw type that can be used to represent all values of the conforming type. 準拠している型の全ての値を表すために使われることができる生の型。

Identifying Related Types 関連型を識別する

typealias ExtendedGraphemeClusterLiteralType
A type that represents an extended grapheme cluster literal.
typealias UnicodeScalarLiteralType
A type that represents a Unicode scalar literal.
typealias StringLiteralType
A type that represents a string literal.

Default Implementations 省略時実装

ExpressibleByUnicodeScalarLiteral Implementations
ExpressibleByExtendedGraphemeClusterLiteral Implementations

Relationships 関係

Conforms To 次に準拠

See Also 参照

Preview Customization プレビューカスタマイゼーション

func previewDisplayName(String?) -> some View
Sets a user visible name to show in the canvas for a preview.
func previewDevice(PreviewDevice?) -> some View
Overrides the device for a preview. プレビューに対するデバイスをオーバーライドします。
func previewLayout(PreviewLayout) -> some View
Overrides the size of the container for the preview. プレビューに対するコンテナの大きさをオーバーライドします。
enum PreviewLayout
A size constraint for a preview.
func previewInterfaceOrientation(InterfaceOrientation) -> some View
Overrides the orientation of the preview.
struct InterfaceOrientation
The orientation of the interface from the user’s perspective.