Swift和访问嵌套的JSON集合

let json = """
{
  "name": "John",
  "age": 30,
  "address": {
    "street": "123 Main St",
    "city": "New York"
  },
  "friends": [
    {
      "name": "Jane",
      "age": 28
    },
    {
      "name": "Tom",
      "age": 32
    }
  ]
}
"""

// 解析JSON数据
guard let data = json.data(using: .utf8),
      let jsonObject = try? JSONSerialization.jsonObject(with: data, options: []),
      let jsonDict = jsonObject as? [String: Any] else {
    fatalError("Failed to parse JSON")
}

// 访问嵌套的数据
let name = jsonDict["name"] as? String
let age = jsonDict["age"] as? Int
let street = jsonDict["address"] as? [String: Any]?["street"] as? String
let city = jsonDict["address"] as? [String: Any]?["city"] as? String
let friends = jsonDict["friends"] as? [[String: Any]]

// 遍历嵌套的数组
for friend in friends ?? [] {
    let friendName = friend["name"] as? String
    let friendAge = friend["age"] as? Int
    // 处理每个朋友的数据
}