小编Bra*_*ndt的帖子

在 Playgrounds 中，以下代码会产生错误：

import Foundation

struct Model: Codable {

  let textBody: String

  enum CodingKeys: String, CodingKey {
    case textBody = "TextBody"
  }
}

let json = """
          {
            "TextBody": "First Line\n\nLastLine"
          }
          """.data(using: .utf8)!


let model = try! JSONDecoder().decode(Model.self, from: json)

致命错误：“尝试！” 表达式意外引发错误： Swift.DecodingError.dataCorrupted(Swift.DecodingError.Context(codingPath: [], debugDescription: "The given data was not valid JSON.",underlyingError: Optional(Error Domain=NSCocoaErrorDomain Code=3840 "Unescaped control字符 27 周围的字符。” UserInfo={NSDebugDescription=字符 27 周围的未转义控制字符。})))：文件 MyPlayground.playground，第 19 行

根据 JSONLint，上面的 JSON 是完全有效的。那么什么给呢？

更新：

我需要一个解决方案来处理从 API 返回的数据。这是我到目前为止想出的东西，但它很糟糕......

if let data = data,
        let …

使用以下OptionSet:

struct StatusOptions : OptionSet {
    let rawValue: Int
    static let CountdownDuration0 = StatusOptions(rawValue: 1 << 0)
    static let CountdownDuration1 = StatusOptions(rawValue: 1 << 1)
    static let CountdownDuration2 = StatusOptions(rawValue: 1 << 2)
    static let CountdownDuration3 = StatusOptions(rawValue: 1 << 3)
    static let CountdownDuration4 = StatusOptions(rawValue: 1 << 4)
    static let CountdownDuration5 = StatusOptions(rawValue: 1 << 5)
    static let HomeMode = StatusOptions(rawValue: 1 << 6)
    static let AwayMode = StatusOptions(rawValue: 1 << 7)

    static let Disarmed: StatusOptions = []
    static …