swift - 如何在 Swift 中编码 CGPoint 数组

Question

你好，我从 here 找到了没有数组的好解决方案，工作正常

@propertyWrapper
struct EncodablePoint: Encodable {
    var wrappedValue: CGPoint
    enum CodingKeys: CodingKey {
        case x
        case y
    }
    func encode(to encoder: Encoder) throws {
        var c = encoder.container(keyedBy: CodingKeys.self)
        try c.encode(wrappedValue.x, forKey: .x)
        try c.encode(wrappedValue.y, forKey: .y)
    }
}
//usage:
struct Foo: Encodable {
    @EncodablePoint var pt: CGPoint = CGPoint(x: 123, y: 456)
    var other = "zxcv"
}

let foo = Foo()
let encoded = try! JSONEncoder().encode(foo)
print(String(bytes: encoded, encoding: .utf8) ?? "nil") // {"pt":{"x":123,"y":456},"other":"zxcv"}

请我想要与数组类似的解决方案，如果有人知道请帮助我。我想要一些类似的东西:

@propertyWrapper
struct EncodablePointsArray: Encodable {
    var wrappedValue: [CGPoint]
    enum CodingKeys: CodingKey {
        ?????
    }
    func encode(to encoder: Encoder) throws {
        ??????
    }
}


struct Foo2: Encodable {
    @EncodablePointsArray var pt: [CGPoint] = [CGPoint]
    var other = "zxcv"
}

let foo2 = Foo2()
let encoded = try! JSONEncoder().encode(foo2)
print(String(bytes: encoded, encoding: .utf8) ?? "nil")
// I wold like output like : {"ArrayPoints“:[{„x“:1.1,“y“:1.2},{„x“:2.1,“y“:3.4}]},"other":"zxcv"}

Answer 1

您将使用过时的信息。 [CGPoint] Codable 现在没有任何扩展。

struct Foo2: Encodable {
  var pt: [CGPoint] = []
  var other = "zxcv"
}

如果您确实需要包装器，请发布需要它的代码。您的问题表明您不需要包装器。