如何在swift4中从json数组中获取值

[
    {
        "name": "Alice",
        "age": 25
    },
    {
        "name": "Bob",
        "age": 30
    }
]

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

let jsonString = """
[
    {
        "name": "Alice",
        "age": 25
    },
    {
        "name": "Bob",
        "age": 30
    }
]
"""

let jsonData = jsonString.data(using: .utf8)!
let decoder = JSONDecoder()
do {
    let persons = try decoder.decode([Person].self, from: jsonData)
    for person in persons {
        print(person.name, person.age)
    }
} catch {
    print("Error: \(error)")
}

Alice 25
Bob 30