如何从swift文件路径中获取文件名

Question

如何从给定的文件路径字符串中获取文件名？

例如,如果我有一个文件路径字符串

file:///Users/DeveloperTeam/Library/Developer/CoreSimulator/Devices/F33222DF-D8F0-448B-A127-C5B03C64D0DC/data/Containers/Data/Application/5D0A6264-6007-4E69-A63B-D77868EA1807/tmp/trim.D152E6EA-D19D-4E3F-8110-6EACB2833CE3.MOV

我希望得到返回结果

trim.D152E6EA-D19D-4E3F-8110-6EACB2833CE3.MOV 

谢谢您的帮助.

Answer 1

目标C.

NSString* theFileName = [string lastPathComponent]

迅速

let theFileName = (string as NSString).lastPathComponent

Answer 2

SWIFT 3.x或SWIFT 4:最简单,最干净的方法如下.在这个示例中,url变量是这样的类型,URL我们可以String使用扩展名为My file name.txt和不喜欢的完整文件名的人类可读结果My%20file%20name.txt

// Result like: My file name.txt
let fileName = url.lastPathComponent

Answer 3

斯威夫特2:

var file_name = NSURL(fileURLWithPath: path_to_file).lastPathComponent!

Answer 4

如果您想获取当前文件名,例如用于记录目的,我会使用它.

斯威夫特4

URL(fileURLWithPath: #file).lastPathComponent

Answer 5

let theURL = URL(string: "yourURL/somePDF.pdf")  //use your URL
let fileNameWithExt = theURL?.lastPathComponent //somePDF.pdf
let fileNameLessExt = theURL?.deletingPathExtension().lastPathComponent //somePDF

为了使其工作，您的 url 必须是 URL 类型而不是字符串，因此不要事先将其转换为字符串。

您可以将此代码直接复制并粘贴到 Playground 中以查看其工作原理。

Answer 6

试试这个

let filename: String = "your file name"
let pathExtention = filename.pathExtension
let pathPrefix = filename.stringByDeletingPathExtension

更新 :

extension String {
    var fileURL: URL {
        return URL(fileURLWithPath: self)
    }
    var pathExtension: String {
        return fileURL.pathExtension
    }
    var lastPathComponent: String {
        return fileURL.lastPathComponent
    }
}

希望能帮助到你.

Answer 7

下面的代码在Swift 4.X中为我工作

 let filename = (self.pdfURL as NSString).lastPathComponent  // pdfURL is your file url
 let fileExtention = (filename as NSString).pathExtension  // get your file extension
 let pathPrefix = (filename as NSString).deletingPathExtension   // File name without extension
 self.lblFileName.text = pathPrefix  // Print name on Label

Answer 8

我做了一些性能测试（iOS 14，真实设备，发布配置）：

(#file as NSString).lastPathComponent // The fastest option.

URL(string: #file)!.lastPathComponent // 2.5 times slower than NSString.

#file.components(separatedBy: "/").last! // 7 times slower than NSString.

奖金：

URL(fileURLWithPath: #file, isDirectory: false).lastPathComponent // About the same as URL(string:).

URL(fileURLWithPath: #file).lastPathComponent // 2.5 times slower than with explicit isDirectory.

Answer 9

您可以在 fileUrl 中传递 url，就像我在下面所做的那样：-

let fileUrl: String = "https://www.himgs.com/imagenes/hello/social/hello-fb-logo.png" // Pass the URL 

let lastPathComponent = URL.init(string: fileUrl)?.lastPathComponent ?? "" // With this you will get last path component

let fileNameWithExtension = lastPathComponent

//最后一个路径组件将为您提供带扩展名的文件名。