Swift Save Image to a file

SwiftSaveImageToFile.md

How To Save a UIImage to a file

Thanks to Paul Hudson Hacking with Swift

func getDocumentsDirectory() -> URL {
    let paths = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask)
    return paths[0]
}

For a PNG

if let image = UIImage(named: "example.png") {
    if let data = image.pngData() {
        let filename = getDocumentsDirectory().appendingPathComponent("copy.png")
        try? data.write(to: filename)
    }
}

For a JPEG

if let image = UIImage(named: "example.png") {
    if let data = image.jpegData(compressionQuality: 0.8) {
        let filename = getDocumentsDirectory().appendingPathComponent("copy.png")
        try? data.write(to: filename)
    }
}

The parameter to jpegData() is a float that represents JPEG quality, where 1.0 is highest and 0.0 is lowest.