Swift 4如何将自定义对象数组转换为JSON

import Foundation

// 定义自定义对象
struct Person: Codable {
    var name: String
    var age: Int
}

// 创建自定义对象数组
let persons = [Person(name: "John", age: 25), Person(name: "Jane", age: 30)]

// 将自定义对象数组转换为JSON数据
let encoder = JSONEncoder()
encoder.outputFormatting = .prettyPrinted

do {
    let jsonData = try encoder.encode(persons)
    if let jsonString = String(data: jsonData, encoding: .utf8) {
        print(jsonString)
    }
} catch {
    print("Error converting to JSON: \(error)")
}