如何在swift中检查assets文件夹中是否存在文件？

import Foundation

func checkFileExistence(fileName: String) -> Bool {
    let fileManager = FileManager.default
    guard let assetsURL = Bundle.main.url(forResource: "Assets", withExtension: nil) else {
        return false
    }
    
    let fileURL = assetsURL.appendingPathComponent(fileName)
    return fileManager.fileExists(atPath: fileURL.path)
}

// 调用示例
let fileName = "example.txt"
let fileExists = checkFileExistence(fileName: fileName)
if fileExists {
    print("文件存在")
} else {
    print("文件不存在")
}