swift 中文件的路径扩展名和 MIME 类型

Swift是一种流行的编程语言，广泛用于开发iOS、macOS和其他Apple平台的应用程序。在Swift中，我们可以通过文件路径来获取文件的扩展名和MIME类型。本文将介绍如何使用Swift来实现这些功能，并提供一些示例代码。

swift
let fileURL = URL(fileURLWithPath: "/path/to/file.txt")
let fileExtension = fileURL.pathExtension
print("文件扩展名：\(fileExtension)")

swift
let fileURL = URL(fileURLWithPath: "/path/to/file.txt")
let request = URLRequest(url: fileURL)
let task = URLSession.shared.dataTask(with: request) { (data, response, error) in
    if let mimeType = response?.mimeType {
        print("文件的MIME类型：\(mimeType)")
    }
}
task.resume()

swift
import Foundation
func getFileExtension(from filePath: String) -> String? {
    let fileURL = URL(fileURLWithPath: filePath)
    return fileURL.pathExtension
}
func getMIMEType(from fileURL: URL, completion: @escaping (String?) -> Void) {
    let request = URLRequest(url: fileURL)
    let task = URLSession.shared.dataTask(with: request) { (data, response, error) in
        if let mimeType = response?.mimeType {
            completion(mimeType)
        } else {
            completion(nil)
        }
    }
    task.resume()
}
// 示例用法
let filePath = "/path/to/file.txt"
if let fileExtension = getFileExtension(from: filePath) {
    print("文件扩展名：\(fileExtension)")
}
let fileURL = URL(fileURLWithPath: filePath)
getMIMEType(from: fileURL) { (mimeType) in
    if let mimeType = mimeType {
        print("文件的MIME类型：\(mimeType)")
    }
}

swift
let fileURL = URL(fileURLWithPath: "/path/to/file.txt")
let fileExtension = fileURL.pathExtension
print("文件扩展名：\(fileExtension)")

swift
let fileURL = URL(fileURLWithPath: "/path/to/file.txt")
let request = URLRequest(url: fileURL)
let task = URLSession.shared.dataTask(with: request) { (data, response, error) in
    if let mimeType = response?.mimeType {
        print("文件的MIME类型：\(mimeType)")
    }
}
task.resume()