如何实现SwiftyJSON来获取这些数据

pod 'SwiftyJSON'

{
  "name": "John",
  "age": 30,
  "city": "New York"
}

let jsonString = """
{
  "name": "John",
  "age": 30,
  "city": "New York"
}
"""

if let jsonData = jsonString.data(using: .utf8) {
    // 解析 JSON 数据
    let json = JSON(jsonData)
}

if let name = json["name"].string {
    print("Name: \(name)")
}

if let age = json["age"].int {
    print("Age: \(age)")
}

if let city = json["city"].string {
    print("City: \(city)")
}

{
  "users": [
    {
      "name": "John",
      "age": 30
    },
    {
      "name": "Jane",
      "age": 28
    }
  ]
}

if let usersArray = json["users"].array {
    for user in usersArray {
        if let name = user["name"].string {
            print("Name: \(name)")
        }
        if let age = user["age"].int {
            print("Age: \(age)")
        }
    }
}