在Swift for iOS中解析嵌套JSON对象中的数据的问题

{
  "name": "John",
  "age": 30,
  "address": {
    "street": "123 Main St",
    "city": "New York"
  }
}

struct Person: Codable {
  let name: String
  let age: Int
  let address: Address
}

struct Address: Codable {
  let street: String
  let city: String
}

let jsonString = """
{
  "name": "John",
  "age": 30,
  "address": {
    "street": "123 Main St",
    "city": "New York"
  }
}
"""

let jsonData = jsonString.data(using: .utf8)

do {
  let person = try JSONDecoder().decode(Person.self, from: jsonData!)
  print(person.name) // 输出：John
  print(person.age) // 输出：30
  print(person.address.street) // 输出：123 Main St
  print(person.address.city) // 输出：New York
} catch {
  print("解析JSON失败：\(error)")
}