Swift data write to Document directory maintaining directory structure - ios

Question

I am downloading file from firebase. let say the request url is following
social-cam-storage/albm-72/owner-2/1484043313786.jpeg
i can download the file using the following code
func downloadFile(url : String) {
let storageR = FIRStorage.storage().reference(withPath: url)
let maxSize : Int64 = 3 * 1024 * 1024 // 3MB
storageR.data(withMaxSize: maxSize) { (data, error) in
if error != nil {
print(error.debugDescription)
return
}
print(data!)
}
}
Now i need to store this data maintaining the directory structure of the url
I have tried
let documentsURL = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first!
print(FileManager.default.createFile(atPath: "\(documentsURL.absoluteString)/\(url)", contents: data!, attributes: nil))
but i am getting false
so how to fix this or is there any other way to save??

Answer 1

Have you tried something like this? :
If you have the exact path already as a string:
try? data.write(to: URL(fileURLWithPath: path), options: [.atomic])
If you need the path there are a few methods:
func saveFile() {
let filePath = getDocumentsURL().absoluteString.appending(path)
try? data.write(to: URL(fileURLWithPath: filePath), options: [.atomic])
}
func getDocumentsURL() -> URL {
let documentsURL = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask)[0]
return documentsURL
}
You could also just try saving the filename, and then loading later when you need it:
func fileInDocumentsDirectory(_ filename: String) -> String {
let fileURL = getDocumentsURL().appendingPathComponent(filename)
return fileURL.path
}
// To save file
func saveFile(data: Data) {
let fileName:String = "createUniqueFileName"
let filePath = fileInDocumentsDirectory(fileName)
saveData(data, filePath)
}
// To load file with saved file name
func loadFile(fileName: String) {
if let loadedData = loadData(fileName) {
// Handle data however you wish
}
}
func saveData(_ data: Data, path: String ) {
try? data.write(to: URL(fileURLWithPath: path), options: [.atomic])
}
func loadData(_ path: String) -> Data? {
let data:Data? = try? Data(contentsOf: URL(fileURLWithPath: path))
return data
}

Answer 2

Have you tried using the built in "download to file" API in Firebase Storage?
// Create a reference to the file you want to download
let fileURL = storage.reference(withPath: url)
// Create local filesystem URL
let documentsURL = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first!
let fileURL = ...
// Download to the local filesystem
let downloadTask = islandRef.write(toFile: fileURL) { url, error in
if let error = error {
// Uh-oh, an error occurred!
} else {
// Local file URL is returned
}
}