How to create a text file for writing

Question

I have a problem with writing text to a file. What I have done so far is this: I have a line with saved text and a file name as well as a line.

let someText = "abcd" let fileName = "file:///xxx" 

Of course, "xxx" is a .txt file in the document directory, so it could be written.
Then I found out that I can use the o write method for the string. But for this call, I need the file name as url, so I have this piece of code:

 let fileUrl = URL(string: fileName) do { try someText.write(to: fileUrl, atomically: false, encoding: String.Encoding.utf8) } catch { } 

If I run the application, I will get the error message "The xxx file does not exist." It’s good that this is correct, because the file was not created. I thought the recording method does this automatically, but it is not. And this moment I do not know how to solve this problem!

I am using Xcode 8 + Swift 3.

+++ EDIT +++

I'm trying to explain what I'm exactly looking for. Let's say I have two tasks: the first task builds the file names and stores them in the database. Therefore, I work with strings:

 var fileName = try! FileManager.default.url(for: .documentDirectory, in: .userDomainMask, appropriateFor: nil, create: false).path if (!fileName.hasSuffix("/")) { fileName += "/" } fileName += "file.txt" 

As you can see, the file is not being created at the moment, because I only need a name in this task.

Good, and then the second task. He should select a specific file name from the database and add it to the file: // schema:

 let fileName = "file://" + fileNameFromDatabase 

Then the text is written using the code above.
It is clear that the file does not exist in this task because I only have a name. Therefore, I believe that the write method error message is correct. Now I'm looking for an opportunity to create a file / write text in one step.

Answer 1

Swift 3 example:

 func write(text: String, to fileNamed: String, folder: String = "SavedFiles") { guard let path = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true).first else { return } guard let writePath = NSURL(fileURLWithPath: path).appendingPathComponent(folder) else { return } try? FileManager.default.createDirectory(atPath: writePath.path, withIntermediateDirectories: true) let file = writePath.appendingPathComponent(fileNamed + ".txt") try? text.write(to: file, atomically: false, encoding: String.Encoding.utf8) } 

Answer 2

I recently ran into some problems by trying simply:

 "my string".writeToURL... 

How you will learn from the tutorial how to do this. In the end, I came up with this method (quick 2.3, for which I apologize). I continued to receive a message stating that I did not have write permission. Then I started getting your error. The bottom works for me. The file parameter is what you want your file name to be.

 func writeDataToFile(file: String)-> Bool{ let documentsPath = NSURL(fileURLWithPath: NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true)[0]) let logsPath = documentsPath.URLByAppendingPathComponent("yourFolderDirectory") do { try NSFileManager.defaultManager().createDirectoryAtPath(logsPath!.path!, withIntermediateDirectories: true, attributes: nil) } catch let error as NSError { NSLog("Unable to create directory \(error.debugDescription)") } let str = "hello world" let fileName = logsPath?.URLByAppendingPathComponent(file + ".txt") do{ try str.writeToURL(fileName!, atomically: false, encoding: NSUTF8StringEncoding) return true } catch let error as NSError { print("Ooops! Something went wrong: \(error)") return false } }