I am saving files in a document directory in swift 3 with this code:
fileManager = FileManager.default
// let documentDirectory = fileManager?.urls(for: .documentDirectory, in: .userDomainMask).first as String
var path = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true)[0] as String
path = path + name
let image = #imageLiteral(resourceName: "Notifications")
let imageData = UIImageJPEGRepresentation(image, 0.5)
let bool = fileManager?.createFile(atPath: path, contents: imageData, attributes: nil)
print("bool is \(bool)")
return true
But as you can see, I am not using filemanager
to get document directory path as filemanager
gives only URL not string.
Questions:
Please think the other way round.
URL
is the recommended way to handle file paths because it contains all convenience methods for appending and deleting path components and extensions – rather than String
which Apple has removed those methods from.
You are discouraged from concatenating paths like path = path + name
. It's error-prone because you are responsible for all slash path separators.
Further you don't need to create a file with FileManager
. Data
has a method to write data to disk.
let fileManager = FileManager.default
do {
let documentDirectory = try fileManager.url(for: .documentDirectory, in: .userDomainMask, appropriateFor:nil, create:false)
let fileURL = documentDirectory.appendingPathComponent(name)
let image = #imageLiteral(resourceName: "Notifications")
if let imageData = image.jpegData(compressionQuality: 0.5) {
try imageData.write(to: fileURL)
return true
}
} catch {
print(error)
}
return false
following the above example given by vadian the only line you need to save a (Data)file in Document Directory is:
try imageData.write(to: fileURL)
Getting the file path is the interesting part
ex: create the file path
func createNewDirPath( )->URL{
let dirPathNoScheme = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true)[0] as String
//add directory path file Scheme; some operations fail w/out it
let dirPath = "file://\(dirPathNoScheme)"
//name your file, make sure you get the ext right .mp3/.wav/.m4a/.mov/.whatever
let fileName = "thisIsYourFileName.mov"
let pathArray = [dirPath, fileName]
let path = URL(string: pathArray.joined(separator: "/"))
//use a guard since the result is an optional
guard let filePath = path else {
//if it fails do this stuff:
return URL(string: "choose how to handle error here")!
}
//if it works return the filePath
return filePath
}
call the function:
let shinnyNewURLpath = createNewDirPath( )
//write data to file using one line in do/catch operation
do {
try yourDataObject?.write(to: shinnyNewURLpath)
}
catch {
print("catch error",error.localizedDescription)
}
I use the following method for creating "Test.txt" file. Hope it helps you.
func createFile() {
let fileName = "Test"
let documentDirURL = try! FileManager.default.url(for: .documentDirectory, in: .userDomainMask, appropriateFor: nil, create: true)
let fileURL = documentDirURL.appendingPathComponent(fileName).appendingPathExtension("txt")
print("File PAth: \(fileURL.path)")
}
func copyandpaste() {
var path = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true)
let dbpath: NSString = path[0] as NSString
let strdbpath = dbpath.strings(byAppendingPaths: ["mydb.db"])[0]
print(strdbpath)
let fmnager = FileManager.default
if !fmnager.fileExists(atPath: strdbpath) {
let local = Bundle.main.path(forResource: "mydb", ofType: "db")
do {
try fmnager.copyItem(atPath: local!, toPath: strdbpath)
} catch {
}
}
}
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