Swift Playgrounds iPad- JSON财务建模PREP API的解析

Question

g'day 我正在尝试从FMP API中获取财务数据。

import SwiftUI
import PlaygroundSupport
import Foundation

let url = URL(string: "https://financialmodelingprep.com/api/v3/income-statement/AAPL?apikey=XXXX")

var request = URLRequest(url: url!)

request.addValue("application/json", forHTTPHeaderField: "Accept") //error flag
let task = URLSession.shared.dataTask(with: url!) { data, response, error in
    guard error == nil else {
        print(error!)
        return
    }
    guard let data = data else {
        print("Data is empty")
        return
    }
    
    let json = try! JSONSerialization.jsonObject(with: data, options: [])
    print(json)
}

task.resume() //error flag
PlaygroundPage.current.needsIndefiniteExecution = true //error flag

这是他们为Swift建议的代码，但是当我尝试在iPad上的操场上尝试此操作时，我会遇到“不允许在最高级别的表达式”的错误。知道怎么了？

感谢任何帮助。干杯