尝试使用SwiftyJSON在swift 3中解析JSON数据

import SwiftyJSON

let jsonString = """
{
    "name": "John",
    "age": 30,
    "isStudent": true,
    "address": {
        "street": "123 ABC Street",
        "city": "New York"
    },
    "hobbies": ["reading", "swimming", "coding"]
}
"""

if let jsonData = jsonString.data(using: .utf8) {
    do {
        let json = try JSON(data: jsonData)
        
        // 在这里可以使用SwiftyJSON提供的API来访问和操作JSON数据
    } catch {
        print("Error parsing JSON: \(error)")
    }
}

let name = json["name"].stringValue
let age = json["age"].intValue
let isStudent = json["isStudent"].boolValue

let street = json["address"]["street"].stringValue
let city = json["address"]["city"].stringValue

let hobbies = json["hobbies"].arrayValue
for hobby in hobbies {
    let hobbyName = hobby.stringValue
    // 处理每个爱好
}

if json["address"].exists() {
    // 键存在
} else {
    // 键不存在
}