ios - swift Codable 中的 GMSPath 不符合 swift 协议

Question

我创建了一个模型并使用了可编码的模型。我目前正在使用 GMSPath 来获取路径，但是在添加到模型类时，我得到了错误 Type 'EstimateResponse' does not conform to protocol 'Decodable'并且 Type 'EstimateResponse' does not conform to protocol 'Encodable'

下面是我的模型

class EstimateResponse: Codable {

    var path: GMSPath? // Set by Google directions API call
    var destination: String?
    var distance: String?
}

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Answer 1

GMSPath有一个encodedPath属性（它是一个字符串），它也可以用一个编码路径初始化。您只需要将您的编码GMSPath为它的编码路径表示。

符合显式EstimateResponse实现Codable：

class EstimateResponse : Codable {
    var path: GMSPath?
    var destination: String?
    var distance: String?

    enum CodingKeys: CodingKey {
        case path, destination, distance
    }
    required init(from decoder: Decoder) throws {
        let container = try decoder.container(keyedBy: CodingKeys.self)
        let encodedPath = try container.decode(String.self, forKey: .path)
        path = GMSPath(fromEncodedPath: encodedPath)
        destination = try container.decode(String.self, forKey: .destination)
        distance = try container.decode(String.self, forKey: .distance)
    }

    func encode(to encoder: Encoder) throws {
        var container = try encoder.container(keyedBy: CodingKeys.self)
        try container.encode(path?.encodedPath(), forKey: .path)
        try container.encode(destination, forKey: .destination)
        try container.encode(distance, forKey: .distance)
    }
}