I missed required property.
var hexColor: UInt
bad_pixel
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I made .transformable work this way, but there is - probably/hopefully - better solution as this looks ugly.
import SwiftUI
import SwiftData
@Model
final class MyModel {
// ...
@Attribute(.transformable) var color: Color {
get {
_$observationRegistrar.access(self, keyPath: \.hexColor)
return Color(hex: self.getValue(for: \.hexColor))
}
set {
_$observationRegistrar.withMutation(of: self, keyPath: \.hexColor) {
self.setValue(for: \.hexColor, to: newValue.hex)
}
}
}
// ...
}
And here is the extension.
import SwiftData
import SwiftUI
import UIKit
extension Color {
var hex: UInt {
let components = self.cgColor?.components
let r = components?[0] ?? 0
let g = components?[1] ?? 0
let b = components?[2] ?? 0
let red = UInt(r * 255) << 16
let green = UInt(g * 255) << 08
let blue = UInt(b * 255)
return red | green | blue
}
init(hex: UInt, alpha: Double = 1) {
self.init(
.sRGB,
red: Double((hex >> 16) & 0xff) / 255,
green: Double((hex >> 08) & 0xff) / 255,
blue: Double((hex >> 00) & 0xff) / 255,
opacity: alpha
)
}
}