使用Codable解析嵌套的无键JSON

struct NestedJSON: Codable {
    let name: String
    let age: Int
    let hobbies: [String]
    let address: [String: String]
}

let json = """
{
    "name": "John",
    "age": 25,
    "hobbies": ["reading", "swimming"],
    "address": {
        "city": "New York",
        "country": "USA"
    }
}
"""

let data = json.data(using: .utf8)!
let decoder = JSONDecoder()

do {
    let nestedJSON = try decoder.decode(NestedJSON.self, from: data)
    print(nestedJSON.name) // 输出: John
    print(nestedJSON.age) // 输出: 25
    print(nestedJSON.hobbies) // 输出: ["reading", "swimming"]
    print(nestedJSON.address) // 输出: ["city": "New York", "country": "USA"]
} catch {
    print("解析失败: \(error)")
}