如何在Swift 4中将带有根元素的JSON正确解析为数组？

{
  "items": [
    {"name": "Item 1", "price": 10},
    {"name": "Item 2", "price": 20},
    {"name": "Item 3", "price": 30}
  ]
}

struct Item: Codable {
  let name: String
  let price: Int
}

let jsonString = """
{
  "items": [
    {"name": "Item 1", "price": 10},
    {"name": "Item 2", "price": 20},
    {"name": "Item 3", "price": 30}
  ]
}
"""

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

struct Root: Codable {
  let items: [Item]
  
  private enum CodingKeys: String, CodingKey {
    case items
  }
}

do {
  let root = try JSONDecoder().decode(Root.self, from: jsonData)
  let items = root.items
  
  for item in items {
    print("Name: \(item.name), Price: \(item.price)")
  }
} catch {
  print("Error: \(error)")
}