json - 统计从 JSON 读取的数据

Question

此代码从数据库中读取 ID 和电影类型。我需要遍历这些信息并计算 id/genres 信息。我现在对它进行了硬编码:

  let url = URL(string: "https://api.themoviedb.org/3/genre/movie/list?api_key=818396bc0172f0f1d446cb4ffc92b7d8&language=en-US")
  do {
    let allData = try Data(contentsOf: url!)
    let info = try JSONSerialization.jsonObject(with: allData, options: JSONSerialization.ReadingOptions.allowFragments) as! [String : AnyObject]
    if let results = info["genres"] {
      print(results)
        for x in 0...18 { // here
          let id = results[x] as! [String : AnyObject]
          print(id)
      }
    }
  } catch {
  }

Answer 1

我看到 genres 是一个 JSONArray，因此您应该将其转换为字典数组并使用 for - in 访问该数组中的每个项目:

let url = URL(string: "https://api.themoviedb.org/3/genre/movie/list?api_key=818396bc0172f0f1d446cb4ffc92b7d8&language=en-US")
do {
    let allData = try Data(contentsOf: url!)
    let info = try JSONSerialization.jsonObject(with: allData, options: JSONSerialization.ReadingOptions.allowFragments) as! [String: Any]
    if let results = info["genres"] as? [[String: Any]] {
        print(results)
        for id in results {
            print(id)
        }
    }
} catch {
}