Swift 4 Codable：键是JSON数据中的Int数组 [英] Swift 4 codable: the keys are Int array in JSON data

问题描述

{
  "0": {
    "name": "legaldoc.pdf",
    "cmisid": "yib5C-w92PPtxTBlXl4UJ8oDBthDtAU9mKN5kh2_KrQ"
  },
  "1": {
    "name": "persdoc.pdf",
    "cmisid": "dqAnrdNMXGTz1RbOMI37OY6tH9xMdxiTnz6wEl2m-VE"
  },
  "2": {
    "name": "certdoc.pdf",
    "cmisid": "6d7DuhldQlnb0JSjXlZb9mMOjxV3E_ID-ynJ0QRPMOA"
  }
}

如何使用Swift 4 Codable解析JSON数据？问题是键是Int数组。
如何为此设置CodingKeys？

How do I use Swift 4 Codable to parse JSON data like that? the problem is that the keys are Int array. How do I set CodingKeys for this?

推荐答案

如注释中所述，没有数组。所有集合类型都是字典。

As mentioned in the comments there is no array. All collection types are dictionaries.

您可以将其解码为Swift字典。要获得数组映射，将结果映射到已排序键的值

You can decode it as Swift dictionary. To get an array map the result to the values of the sorted keys

let jsonString = """
{
    "0": {
        "name": "legaldoc.pdf",
        "cmisid": "yib5C-w92PPtxTBlXl4UJ8oDBthDtAU9mKN5kh2_KrQ"
    },
    "1": {
        "name": "persdoc.pdf",
        "cmisid": "dqAnrdNMXGTz1RbOMI37OY6tH9xMdxiTnz6wEl2m-VE"
    },
    "2": {
        "name": "certdoc.pdf",
        "cmisid": "6d7DuhldQlnb0JSjXlZb9mMOjxV3E_ID-ynJ0QRPMOA"
    }
}
"""

---

---

struct Item : Codable {
    let name, cmisid : String
}

---

---

do {
    let data = Data(jsonString.utf8)
    let result = try JSONDecoder().decode([String: Item].self, from: data)
    let keys = result.keys.sorted()
    let array = keys.map{ result[$0]! }
    print(array)

} catch {
    print(error)
}

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