如何从iphone应用程序中的文件中读取字节数？

import Foundation

let fileURL = URL(fileURLWithPath: "path/to/your/file")

do {
    let data = try Data(contentsOf: fileURL)
} catch {
    print("Error reading file: \(error)")
}

let byteCount = data.count
print("Byte count: \(byteCount)")

import Foundation

func readByteCount(fromFileAtPath path: String) -> Int? {
    let fileURL = URL(fileURLWithPath: path)
    do {
        let data = try Data(contentsOf: fileURL)
        return data.count
    } catch {
        print("Error reading file: \(error)")
        return nil
    }
}

let byteCount = readByteCount(fromFileAtPath: "path/to/your/file")
print("Byte count: \(byteCount)")