在SwiftUI中使用十六进制颜色

Another alternative below that uses Int for hex but of course, it can be changed to String if you prefer that.

extension Color {
    init(hex: Int, alpha: Double = 1) {
        let compOnents= (
            R: Double((hex >> 16) & 0xff) / 255,
            G: Double((hex >> 08) & 0xff) / 255,
            B: Double((hex >> 00) & 0xff) / 255
        )
        self.init(
            .sRGB,
            red: components.R,
            green: components.G,
            blue: components.B,
            opacity: alpha
        )
    }
}

Usage examples:

Color(hex: 0x000000)
Color(hex: 0x000000, alpha: 0.2)