xcode - 如何在 iOS Xcode Swift Playground 上模拟黑暗模式

Question

类似于How to use dark mode in simulator iOS 13?和 How to enable Dark Mode on the Simulator? ，如何在 Xcode Swift Playground Live View 中启用深色模式？

Answer 1

您可以使用 overrideUserInterfaceStyle 在任何 View 中测试它

例如，您可以将这段代码粘贴到 playground 中进行检查(已在 Xcode 11.3.1 中测试):

import Foundation
import PlaygroundSupport

extension UIColor {

    static var primary: UIColor {
        UIColor { trait -> UIColor in
            return trait.userInterfaceStyle == .light ? .black : .white
        }
    }

    static var secondary: UIColor {
        UIColor { trait -> UIColor in
            return trait.userInterfaceStyle == .light ? .white : .black
        }
    }
}

class DarkModeTestView: UIView {

    let label = UILabel(frame: CGRect(x: 0, y: 0, width: 375, height: 300))

    override init(frame: CGRect) {
        super.init(frame: frame)

        backgroundColor = .secondary

        label.text = "This text should be displayed in black for light mode and white for dark mode"
        label.textColor = .primary
        label.numberOfLines = 0

        addSubview(label)
    }

    required init?(coder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
}

let testView = DarkModeTestView(frame: CGRect(x: 0, y: 0, width: 375, height: 300))
testView.overrideUserInterfaceStyle = .dark // Change here .light or .dark

PlaygroundPage.current.liveView = testView