How to have Codable Color?

Question

Luca_65 OP

Created Aug ’20

Replies 1

Boosts 0

Views 3.0k

Participants 1

The struct C correctly encode UIColor

Code Block 	...
	let c = C()
	let j = c.json
	...
struct C: Encodable
{
	var mycolor: UIColor = .red
	enum CodingKeys: String, CodingKey
	{
		case color
	}
	func encode(to encoder: Encoder) throws
	{
		var container = encoder.container(keyedBy: CodingKeys.self)
		let colorData = try 	NSKeyedArchiver.archivedData(withRootObject: mycolor, requiringSecureCoding: false)
		try container.encode(colorData, forKey: .color)
	}
	var json: Data? {try? JSONEncoder().encode(self)}
}

but it's impossible, to me, the encode Color.

Code Block 	var mycolor: Color = Color(.systemRed)

I found the class UIColor is declared conforming to NSSecureCoding, but struct Color isn't and and extension to Codable isn't allowed outside of the type declaring file.

Is there a way to circumvent this limitation?

Answered by Luca_65 in 629845022

I found by myself that is possible since on iOS 14.

Code Block 	func encode(to encoder: Encoder) throws
	{
		var container = encoder.container(keyedBy: CodingKeys.self)
		if #available(iOS 14.0, *)
		{
			let convertedColor = UIColor(mycolor)
			let colorData = try NSKeyedArchiver.archivedData(withRootObject: convertedColor, requiringSecureCoding: false)
			try container.encode(colorData, forKey: .color)
		} else
		{
			// Fallback on earlier versions
		}
	}

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Answer 1

Luca_65 OP

Aug ’20

Accepted Answer

I found by myself that is possible since on iOS 14.

Code Block 	func encode(to encoder: Encoder) throws
	{
		var container = encoder.container(keyedBy: CodingKeys.self)
		if #available(iOS 14.0, *)
		{
			let convertedColor = UIColor(mycolor)
			let colorData = try NSKeyedArchiver.archivedData(withRootObject: convertedColor, requiringSecureCoding: false)
			try container.encode(colorData, forKey: .color)
		} else
		{
			// Fallback on earlier versions
		}
	}

1