Write data on a custom folder with Swift

Question

I am trying to write data on the device. But I don't want them to be public to the user and want to save them in a custom reposity. I tried this code

let fileURL = try! FileManager.default.url(for: .documentDirectory, in: .userDomainMask, appropriateFor: nil, create: true).appendingPathComponent("test/mytest")
print(fileURL)
try data?.write(to: fileURL)

this is the obtained path

file:///var/mobile/Containers/Data/Application/34567-234567dfgh-dfghj/Documents/test/mytest

But I get an error telling me that mytest could not be found in folder test

Papershine · Accepted Answer · 2017-08-31 23:05:47Z

2

You have to create the directory first before you call write:

FileManager.default.fileExists(atPath: fileURL)
var isDir: ObjCBool = ObjCBool(false)
let exists = FileManager.default.fileExists(atPath: fileURL, isDirectory: &isDir)
if !exists && !isDir.boolValue {
    try! FileManager.default.createDirectory(at url: fileURL, withIntermediateDirectories: true)
}

Although when you call url(for:in:appropriateFor:create:), you passed true to create:, the directory /test/mytest is not created because you appended it. So, you have to create it.

edited Aug 31, 2017 at 23:05

answered Aug 31, 2017 at 12:50

Papershine

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4 Comments

user567 Over a year ago

This means that with this solution the directory will be re-created each time I want to write a new file, so old files will be destroyed?

Ashutosh Dave Over a year ago

You create a directory only if the said directory does not exist. You can check if directory exists using FileManager.default.fileExists(atPath: fullPath, isDirectory:&isDir)

Papershine Over a year ago

@user567 added a check

rmaddy Over a year ago

The code in this answer is wrong. This code only attempts to create the directory if it already exists and if it is already a directory.

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