Instance Method インスタンスメソッド

previewDevice(_:)

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。

Declaration 宣言 

func previewDevice(_ value: PreviewDevice?) -> some View

Return Value 戻り値

A preview that uses the given device.

Parameters パラメータ

value

A device to use for preview, or nil to let Xcode automatically choose a device based on the run destination.

Discussion 議論

By default, Xcode automatically chooses a preview device based on your currently selected run destination. If you want to choose a device that doesn’t change based on Xcode settings, provide a PreviewDevice instance that you initialize with the name or model of a specific device:


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, like “iPhone 11”, “iPad Pro (11-inch)”, and “Apple Watch Series 5 - 44mm”, 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”