Enumeration

PreviewPlatform

The operating system on which to run the preview.

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Declaration

enum PreviewPlatform

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Overview

By default, Xcode can infer the platform for a preview based on the target of the current file. However, you can also use this enumeration along with the platform property to change the way a view is displayed in a preview.

Author's note: I tried to use this to change the preview platform, but I couldn't get anything to work. It seems right now that the only way to change your preview device is by actually changing your build target.

This enumeration has 4 different cases:

1. iOS
2. macOS
3. tvOS
4. watchOS

In the following example, we change the preview platform to macOS.

struct ContentView: View {
    var body: some View {
        Text("I should be in a Mac 🖥")
    }
}

struct ContentView\_Previews: PreviewProvider {
    static var previews: some View {
        ContentView()
    }

    static var platform: PreviewPlatform? { .macOS }
}

Availability

iOS 13.0+

macOS 10.15+

tvOS 13.0+

watchOS 6.0+

Topics

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Case

iOS The iOS preview platform.

macOS The macOS preview platform.

tvOS The tvOS preview platform.

watchOS The watchOS preview platform.

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Instance Property

hashValue The hash value.

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Instance Method

hash(into:) Hashes the essential components of this value by feeding them into the given hasher.

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Type Method

==(a:b:) Returns a Boolean value indicating whether two values are equal.