How to split filename from file extension in Swift?

Question

Given the name of a file in the bundle, I want load the file into my Swift app. So I need to use this method:

let soundURL = NSBundle.mainBundle().URLForReso         


        

Answer 1

In Swift 2.1 String.pathExtension is not available anymore. Instead you need to determine it through NSURL conversion:

NSURL(fileURLWithPath: filePath).pathExtension

Answer 2

Works in Swift 5. Adding these behaviors to String class:

extension String {

    func fileName() -> String {
        return URL(fileURLWithPath: self).deletingPathExtension().lastPathComponent 
    }

    func fileExtension() -> String {
        return URL(fileURLWithPath: self).pathExtension
    }
}

Example:

let file = "image.png"
let fileNameWithoutExtension = file.fileName()
let fileExtension = file.fileExtension()

Answer 3

Swift 3.0

 let sourcePath = NSURL(string: fnName)?.pathExtension
 let pathPrefix = fnName.replacingOccurrences(of: "." + sourcePath!, with: "")

Answer 4

This is with Swift 2, Xcode 7: If you have the filename with the extension already on it, then you can pass the full filename in as the first parameter and a blank string as the second parameter:

let soundURL = NSBundle.mainBundle()
    .URLForResource("soundfile.ext", withExtension: "")

Alternatively nil as the extension parameter also works.

If you have a URL, and you want to get the name of the file itself for some reason, then you can do this:

soundURL.URLByDeletingPathExtension?.lastPathComponent

Swift 4

let soundURL = NSBundle.mainBundle().URLForResource("soundfile.ext", withExtension: "")
soundURL.deletingPathExtension().lastPathComponent

Answer 5

A cleaned up answer for Swift 4 with an extension off of PHAsset:

import Photos

extension PHAsset {
    var originalFilename: String? {
        if #available(iOS 9.0, *),
            let resource = PHAssetResource.assetResources(for: self).first {
            return resource.originalFilename
        }

        return value(forKey: "filename") as? String
    }
}

As noted in XCode, the originalFilename is the name of the asset at the time it was created or imported.

Answer 6

Swift 5.0 update:

As pointed out in the comment, you can use this.

let filename: NSString = "bottom_bar.png"
let pathExtention = filename.pathExtension
let pathPrefix = filename.deletingLastPathComponent