在JSON解析后访问结构数据，Swift

import Foundation

// 示例JSON数据
let jsonString = """
{
    "name": "John Doe",
    "age": 30,
    "email": "johndoe@example.com",
    "address": {
        "street": "123 Main St",
        "city": "New York",
        "country": "USA"
    },
    "hobbies": ["reading", "swimming", "coding"]
}
"""

// 将JSON字符串转换为Data类型
guard let jsonData = jsonString.data(using: .utf8) else {
    print("Invalid JSON data")
    return
}

do {
    // 解析JSON数据
    let jsonObject = try JSONSerialization.jsonObject(with: jsonData, options: [])
    
    // 访问结构数据
    if let jsonDict = jsonObject as? [String: Any] {
        let name = jsonDict["name"] as? String
        let age = jsonDict["age"] as? Int
        let email = jsonDict["email"] as? String
        
        if let address = jsonDict["address"] as? [String: Any] {
            let street = address["street"] as? String
            let city = address["city"] as? String
            let country = address["country"] as? String
            
            // 打印访问到的数据
            print("Name: \(name ?? "")")
            print("Age: \(age ?? 0)")
            print("Email: \(email ?? "")")
            print("Street: \(street ?? "")")
            print("City: \(city ?? "")")
            print("Country: \(country ?? "")")
        }
        
        if let hobbies = jsonDict["hobbies"] as? [String] {
            // 打印爱好列表
            print("Hobbies: \(hobbies)")
        }
    }
} catch {
    print("JSON parsing error: \(error)")
}