如何在Swift中执行此操作？(我的版本不工作)

if let fileURL = Bundle.main.url(forResource: "example", withExtension: "txt") {
    do {
        let fileData = try Data(contentsOf: fileURL)
        let fileContent = String(data: fileData, encoding: .utf8)
        print(fileContent)
    } catch {
        print("Error reading file: \(error)")
    }
}

if let url = URL(string: "https://api.example.com/data") {
    let task = URLSession.shared.dataTask(with: url) { (data, response, error) in
        if let error = error {
            print("Error: \(error)")
        } else if let data = data {
            let responseData = String(data: data, encoding: .utf8)
            print(responseData)
        }
    }
    task.resume()
}

import SQLite

let db = try Connection("path/to/database.sqlite")

let users = Table("users")
let id = Expression<Int>("id")
let name = Expression<String>("name")

try db.run(users.create { t in
    t.column(id, primaryKey: true)
    t.column(name)
})

try db.run(users.insert(name <- "John Doe"))

for user in try db.prepare(users) {
    print("User: \(user[name])")
}

import XCTest

class MyTests: XCTestCase {
    func testAddition() {
        let result = 2 + 2
        XCTAssertEqual(result, 4)
    }
}

XCTMain([testCase(MyTests.allTests)])

import AVFoundation
import AVKit

let videoURL = URL(string: "https://example.com/video.mp4")!
let player = AVPlayer(url: videoURL)
let playerViewController = AVPlayerViewController()
playerViewController.player = player

present(playerViewController, animated: true) {
    player.play()
}