Decompress a zip file with Swift

Question

I made a game in Swift but I need to download .zip files on my website, and use the content (images) in game. Actually, I download the .zip file and store it in documents, and I need to unzip the file into the same documents folder.

I tried marmelroy's Zip, iOS 9 Compression module and tidwall's DeflateSwift but none of these worked. It could be good if it was compatible with iOS 8.

Answer 1

I recently released a Swift native framework that allows you to create, read and update ZIP archive files: ZIP Foundation.
It internally uses libcompression for great compression performance.

Unzipping a file is basically just one line:

try fileManager.unzipItem(at: sourceURL, to: destinationURL)

A full example with some context would look like this:

let fileManager = FileManager()
let currentWorkingPath = fileManager.currentDirectoryPath
var sourceURL = URL(fileURLWithPath: currentWorkingPath)
sourceURL.appendPathComponent("archive.zip")
var destinationURL = URL(fileURLWithPath: currentWorkingPath)
destinationURL.appendPathComponent("directory")
do {
    try fileManager.createDirectory(at: destinationURL, withIntermediateDirectories: true, attributes: nil)
    try fileManager.unzipItem(at: sourceURL, to: destinationURL)
} catch {
    print("Extraction of ZIP archive failed with error:\(error)")
}

The README on GitHub contains more information. All public methods also have full documentation available via Xcode Quick Help.

I also wrote a blog post about the performance characteristics here.