I store an .jpg image i the iOS documents directory. I can write files and read files but when it comes to deleting them it says that there is no such file but that cannot be because I can read it with the same url.
Reading:
let paths = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true)
let path = NSURL(fileURLWithPath: paths[0] as String)
let fullPath = path.appendingPathComponent(info["pi"] as! String)
let data = NSData(contentsOf: fullPath!)
Deleting:
let fileManager = FileManager.default
fileManager.delegate = self
let paths = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true)
let path = NSURL(fileURLWithPath: paths[0] as String)
let fullPath = path.appendingPathComponent(info["pi"] as! String)
do {
try fileManager.removeItem(atPath: "\(fullPath!)")
} catch {
print("\(error)")
}
It throws:
Error Domain=NSCocoaErrorDomain Code=4 "“image_496251232.806566.jpg” couldn’t be removed." UserInfo={NSUnderlyingError=0x1758eb40 {Error Domain=NSPOSIXErrorDomain Code=2 "No such file or directory"}, NSFilePath=file:///var/mobile/Containers/Data/Application/269ADA58-6B09-4844-9FAA-AC2407C1D991/Documents/image_496251232.806566.jpg, NSUserStringVariant=(
Remove
)}
Your fullPath variable is a (optional) URL. To convert that to a file path string, use the .path property, not string interpolation:
fileManager.removeItem(atPath: fullPath!.path)
Or better, use the URL directly without converting it to a path:
fileManager.removeItem(at: fullPath!)
(And get rid of the forced unwrapping in favor of option binding ... :-)
Related
override func viewDidLoad() {
super.viewDidLoad()
let dataURLString: String = Bundle.main.path(forResource: "IMG_0568", ofType: "JPG")!
let dataURL = URL(string: dataURLString)
do {
let binaryData = try Data(contentsOf: dataURL!, options: [])
let kbData = binaryData.subdata(in: 0..<1024)
let stringArray = kbData.map{String(format: "%02X", $0)}
let binaryString = stringArray.joined(separator: "-")
print(binaryString)
editorTextView.text = (binaryString)
} catch {
print("Failed to read the file.")
//Error Domain=NSCocoaErrorDomain Code=256 "The file “IMG_0568.JPG” couldn’t be opened." UserInfo={NSURL=/Users/..../IMG_0568.JPG}
}
I want to display the Binary Data of Image File that I have added to my Xcode project (image name: IMG_0568.JPG).
But there's the error
(Error Domain=NSCocoaErrorDomain Code=256 "The file “IMG_0568.JPG”
couldn’t be opened." UserInfo={NSURL=/Users/..../IMG_0568.JPG})
How can I fix this problem?
This is a very common mistake:
URLs in the file system must be initialized with URL(fileURLWithPath
let dataURL = URL(fileURLWithPath: dataURLString)
The difference is:
URL(fileURLWithPath expects a path starting with a slash like /Users/myUser/file.ext
URL(string expects an URL string including the scheme like file:///Users... or http://example.com
However you can avoid the mistake by using the URL related API of Bundle
let dataURL = Bundle.main.url(forResource: "IMG_0568", withExtension: "JPG")!
I am recording video to a file with this code:
print(documentsPath)
//var/mobile/Containers/Data/Application/FFB207E7-36CC-4C53-A2E2-5FADC7C23A18/Documents/gymnastVideos/test.mp4
let filePath = NSURL(fileURLWithPath: documentsPath)
videoFileOutput.startRecording(toOutputFileURL: filePath as URL!, recordingDelegate: recordingDelegate)
and have verified that the file exists, however, when I try to open the file to check if anything is being saved there, I return an error. The code:
var documentsPath = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true)[0]
documentsPath.append("/gymnastVideos")
let filePath = URL(fileURLWithPath: documentsPath)
do {
let directoryContents = try FileManager.default.contentsOfDirectory(at: filePath, includingPropertiesForKeys: nil, options: [])
print(directoryContents)
print("!")
} catch let error as NSError {
print(error.localizedDescription)
//The file “gymnastVideos” couldn’t be opened.
print("!!")
}
Why can't I open the file, and what do I need to change in my code to be able to open the file?
In swift how can I get the file path for a test audio File that i have copied into the resources folder in Xcode
The code I have gives file not found. Am I looking in the right Directories with NSSearchPathForDirectoriesInDomains? Any help much appreciated!
let name = "test.wav"
let paths = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true)[0] as NSString
let filePath = paths.stringByAppendingPathComponent(name)
let checkValidation = NSFileManager.defaultManager()
if (checkValidation.fileExistsAtPath(filePath)) {
print("found .wav")
} else {
print("file not found")
}
i just found this that works.
let name = "test.wav"
let soundPath = (NSBundle.mainBundle().resourcePath! as NSString).stringByAppendingPathComponent(name)
let soundURL = NSURL.fileURLWithPath(soundPath)
Before iOS9, we had created a directory like so
let documentsPath = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true)[0] as! String
let logsPath = documentsPath.stringByAppendingPathComponent("logs")
let errorPointer = NSErrorPointer()
NSFileManager.defaultManager().createDirectoryAtPath(logsPath, withIntermediateDirectories: true, attributes: nil, error: errorPointer)
But with iOS9 they removed String.stringByAppendingPathComponent. The auto convert tool replaced our use of String with NSURL. createDirectoryAtPath() takes a string so I need to convert the NSURL to a string. We used absolutePath like so: (update for iOS9)
let documentsPath = NSURL(fileURLWithPath: NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true)[0])
let logsPath = documentsPath.URLByAppendingPathComponent("logs")
do {
try NSFileManager.defaultManager().createDirectoryAtPath(logsPath.absoluteString, withIntermediateDirectories: true, attributes: nil)
} catch let error as NSError {
NSLog("Unable to create directory \(error.debugDescription)")
}
But I am getting the following error:
Unable to create directory Error Domain=NSCocoaErrorDomain Code=513
"You don’t have permission to save the file “logs” in the folder
“Documents”."
UserInfo={NSFilePath=file:///var/mobile/Containers/Data/Application/F2EF2D4F-94AF-4BF2-AF9E-D0ECBC8637E7/Documents/logs/,
NSUnderlyingError=0x15664d070 {Error Domain=NSPOSIXErrorDomain Code=1
"Operation not permitted"}}
I figured this one out. createDirectoryAtPath() is unable to process a path with the "file://" prefix. To get a path without the prefix you must use path() or relativePath().
let documentsPath = NSURL(fileURLWithPath: NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true)[0])
let logsPath = documentsPath.URLByAppendingPathComponent("logs")
do {
try NSFileManager.defaultManager().createDirectoryAtPath(logsPath.path!, withIntermediateDirectories: true, attributes: nil)
} catch let error as NSError {
NSLog("Unable to create directory \(error.debugDescription)")
}
Incorrect path (notice file://):
file:///var/mobile/Containers/Data/Application/F2EF2D4F-94AF-4BF2-AF9E-D0ECBC8637E7/Documents/logs/
Correct path:
/var/mobile/Containers/Data/Application/F2EF2D4F-94AF-4BF2-AF9E-D0ECBC8637E7/Documents/logs/
Swift 3
let documentsPath = NSURL(fileURLWithPath: NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true)[0])
let logsPath = documentsPath.appendingPathComponent("logs")
do {
try FileManager.default.createDirectory(at: logsPath!, withIntermediateDirectories: true, attributes: nil)
} catch let error as NSError {
NSLog("Unable to create directory \(error.debugDescription)")
}
Swift 4
let paths = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask)
let logsPath = paths[0].appendingPathComponent("logs")
do {
try FileManager.default.createDirectory(at: logsPath, withIntermediateDirectories: true, attributes: nil)
} catch let error as NSError {
NSLog("Unable to create directory \(error.debugDescription)")
}
I'm trying to count the number of directories in the iOS Documents Directory of my app using the following swift code:
let manager = NSFileManager.defaultManager()
let path: NSString = NSBundle.mainBundle().resourcePath!.stringByAppendingPathComponent("Documents")
var array = manager.contentsOfDirectoryAtPath(path, error: nil)
let count = array?.count
My Documents directory currently contains one directory but when I run this code, 'count' returns nil every time. Why is this?
Your method to find the Documents directory is wrong, NSBundle.mainBundle().resourcePath gives the path to the application bundle.
There is a dedicated function for this purpose:
let documentsPath = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true)[0] as String
And then you should use the error parameter and check the return value when
retrieving the directory contents:
let fileManager = NSFileManager.defaultManager()
var error : NSError?
if let files = fileManager.contentsOfDirectoryAtPath(documentsPath, error: &error) {
let count = files.count
// ...
} else {
println("Could not get contents of directory: \(error?.localizedDescription)")
}
Credit to Martin R. for the original answer! Here is a Swift 3 version incase anyone needs it...
Swift 3
func countFilesInDocumentsDirectory() {
let documentsPath = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true) [0] as String
do {
let files = try FileManager.default.contentsOfDirectory(atPath: documentsPath)
print("File count = \(files.count)")
for i in 0...files.count-1 {
print("FILE: \n\(files[i])")
}
} catch {
//...
}
}