JSONDecoder doesn't decode the Contents.json file (returns nil)

[fwaddle]

JSONDecoder doesn't decode the Contents.json file (returns nil)

[fwaddle]

I modified the code to get it to work but it doesn't matter as I still can't use the colour asset stuff with old versions of ios. It works fine if you do it in code but not if you use storyboards to set the colours. Bugger!

Thanks anyway.

[samrayner]

Odd, I wouldn't expect those component values to be Strings! They should always be numerical (without quotes) in the JSON. Did you modify or generate that JSON manually?

[adamwidera1978]

To reproduce, use the latest version of the Xcode. It saves the values of the colours as strings instead of doubles.

The decoding failure relates to this issue inside swift:
https://bugs.swift.org/browse/SR-5249

Modification to the ColorAssetCatalog.swift that would make it usable again is:

extension ColorAsset.Color {

struct Components: Decodable {
    var alpha: CGFloat = 1
    var red: CGFloat = 0
    var green: CGFloat = 0
    var blue: CGFloat = 0

    var white: CGFloat? {
        didSet {
            guard let white = white else { return }
            red = white
            green = white
            blue = white
        }
    }
    
    enum CodingKeys: String, CodingKey {
        case alpha
        case red
        case green
        case blue
    }
    
    init(from decoder: Decoder) throws {
        let values = try decoder.container(keyedBy: CodingKeys.self)
        alpha = CGFloat(Double(try values.decode(String.self, forKey: .alpha))!)
        red = CGFloat(Double(try values.decode(String.self, forKey: .red))!)
        green = CGFloat(Double(try values.decode(String.self, forKey: .green))!)
        blue = CGFloat(Double(try values.decode(String.self, forKey: .blue))!)
    }
}

}

[samrayner]

Thank you @adamwidera1978!

I've made the change. Will publish a new version to Cocoapods when I get a chance later.

2b8a06c