This code is a part of Core Data. The URLsForDirectory....method does not run on iOS < 4 so I need to know some other methods/objects to call. I would also appriciate documentation for future reference. Thank you
/**
Returns the URL to the application's Documents directory.
*/
- (NSURL *)applicationDocumentsDirectory
{
return [[[NSFileManager defaultManager] URLsForDirectory:NSDocumentDirectory inDomains:NSUserDomainMask] lastObject];
}
An alternative solution would be to use the -[NSFileManager URLsForDirectory:inDomains:] method and fetching the path from the returned NSArray:
Objective-C:
NSArray *paths = [[NSFileManager defaultManager] URLsForDirectory:NSDocumentDirectory inDomains:NSUserDomainMask];
NSURL *documentsURL = [paths lastObject];
Swift:
let paths = NSFileManager.defaultManager().URLsForDirectory(.DocumentDirectory, inDomains: .UserDomainMask)
let documentsURL = paths[0] as! NSURL
This is supported in iOS 4.0+
You can get the document path via the NSSearchPathForDirectoriesInDomains foundation function as follows:
NSArray *searchPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentPath = [searchPaths objectAtIndex:0];
This will work on iOS 2+.
Swift 3
let documentsUrl = FileManager.default.urls(for: .documentDirectory, in:.userDomainMask).first!
Here is the Swift 2.2 version:
let paths = NSFileManager.defaultManager().URLsForDirectory(.DocumentDirectory, inDomains: .UserDomainMask)
let filePath = paths[0].URLByAppendingPathComponent("filename")
Starting iOS 16.0 you can use:
URL.documentsdirectory
source
Related
This question already has answers here:
unzip source code in Iphone
(2 answers)
Is there any zip decompression for iPhone?
(3 answers)
Closed 9 years ago.
After StoreKit downloads the IAP content package it returns an NSURL to me which looks like this:
file://localhost/private/var/mobile/Applications/45EF2B3A-3CAB-5A44-4B4A-631A122A4299/Library/Caches/BA32BC55-55DD-3AA4-B4AC-C2A456622229.zip/
Despite all sources I found claiming that StoreKit unzips the content package once downloaded, it hands me over a ZIP. This ZIP probably contains the file structure of the content package. But how do I unzip this?
Use Zip Foundation if you are working in Swift language. It's easy to use and one of the best swift library for unzipping a zip file.
Zip:
let fileManager = FileManager()
let currentWorkingPath = fileManager.currentDirectoryPath
var sourceURL = URL(fileURLWithPath: currentWorkingPath)
sourceURL.appendPathComponent("file.txt")
var destinationURL = URL(fileURLWithPath: currentWorkingPath)
destinationURL.appendPathComponent("archive.zip")
do {
try fileManager.zipItem(at: sourceURL, to: destinationURL)
} catch {
print("Creation of ZIP archive failed with error:\(error)")
}
UnZip:
let fileManager = FileManager()
let currentWorkingPath = fileManager.currentDirectoryPath
var sourceURL = URL(fileURLWithPath: currentWorkingPath)
sourceURL.appendPathComponent("archive.zip")
var destinationURL = URL(fileURLWithPath: currentWorkingPath)
destinationURL.appendPathComponent("directory")
do {
try fileManager.createDirectory(at: destinationURL, withIntermediateDirectories: true, attributes: nil)
try fileManager.unzipItem(at: sourceURL, to: destinationURL)
} catch {
print("Extraction of ZIP archive failed with error:\(error)")
}
If you are using Objective-C then SSZipArchive is the best choice for this.
You can unzip using this
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *outputPath = [documentsDirectory stringByAppendingPathComponent:#"/ImagesFolder"];
NSString *zipPath = Your zip file path;
[SSZipArchive unzipFileAtPath:zipPath toDestination:outputPath delegate:self];
Hope it helps you.
There is a great 3rd party tool for zipping/unzipping files for iPhone
https://github.com/soffes/ssziparchive
Very simple to use. Hope that helps!!
Edit:
Quick method I created which takes url, downloads the zip and unzips it
-(void)downloadAndUnzip : (NSString *)sURL_p : (NSString *)sFolderName_p
{
dispatch_queue_t q = dispatch_get_global_queue(0, 0);
dispatch_queue_t main = dispatch_get_main_queue();
dispatch_async(q, ^{
//Path info
NSURL *url = [NSURL URLWithString:sURL_p];
NSData *data = [NSData dataWithContentsOfURL:url];
NSString *fileName = [[url path] lastPathComponent];
NSString *filePath = [NSTemporaryDirectory() stringByAppendingPathComponent:fileName];
[data writeToFile:filePath atomically:YES];
dispatch_async(main, ^
{
//Write To
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0]; // Get documents folder
NSString *dataPath = [documentsDirectory stringByAppendingPathComponent:sFolderName_p];
[SSZipArchive unzipFileAtPath:filePath toDestination:dataPath];
});
});
}
If I have a UIImage from an imagePicker, how can I save it to a subfolder in the documents directory?
Of course you can create subfolders in the documents folder of your app. You use NSFileManager to do that.
You use UIImagePNGRepresentation to convert your image to NSData and save that to disk.
// Create path.
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *filePath = [[paths objectAtIndex:0] stringByAppendingPathComponent:#"Image.png"];
// Save image.
[UIImagePNGRepresentation(image) writeToFile:filePath atomically:YES];
Core Data has nothing to do with saving images to disk by the way.
In Swift 3:
// Create path.
let paths = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true)
let filePath = "\(paths[0])/MyImageName.png"
// Save image.
UIImagePNGRepresentation(image)?.writeToFile(filePath, atomically: true)
You have to construct a representation of your image as a particular format (say, JPEG or PNG), and then call writeToFile:atomically: on the representation:
UIImage *image = ...;
NSString *path = ...;
[UIImageJPEGRepresentation(image, 1.0) writeToFile:path atomically:YES];
The above are useful, but they don't answer your question of how to save in a subdirectory or get the image from a UIImagePicker.
First, you must specify that your controller implements image picker's delegate, in either .m or .h code file, such as:
#interface CameraViewController () <UIImagePickerControllerDelegate>
#end
Then you implement the delegate's imagePickerController:didFinishPickingMediaWithInfo: method, which is where you can get the photograph from the image picker and save it (of course, you may have another class/object that handles the saving, but I'll just show the code inside the method):
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
// get the captured image
UIImage *image = (UIImage *)info[UIImagePickerControllerOriginalImage];
NSString *documentsDirectory = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];
NSString *imageSubdirectory = [documentsDirectory stringByAppendingPathComponent:#"MySubfolderName"];
NSString *filePath = [imageSubdirectory stringByAppendingPathComponent:#"MyImageName.png"];
// Convert UIImage object into NSData (a wrapper for a stream of bytes) formatted according to PNG spec
NSData *imageData = UIImagePNGRepresentation(image);
[imageData writeToFile:filePath atomically:YES];
}
If you want to save as JPEG image, the last 3 lines would be:
NSString *filePath = [imageSubdirectory stringByAppendingPathComponent:#"MyImageName.jpg"];
// Convert UIImage object into NSData (a wrapper for a stream of bytes) formatted according to JPG spec
NSData *imageData = UIImageJPEGRepresentation(image, 0.85f); // quality level 85%
[imageData writeToFile:filePath atomically:YES];
extension UIImage {
/// Save PNG in the Documents directory
func save(_ name: String) {
let path: String = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true).first!
let url = URL(fileURLWithPath: path).appendingPathComponent(name)
try! UIImagePNGRepresentation(self)?.write(to: url)
print("saved image at \(url)")
}
}
// Usage: Saves file in the Documents directory
image.save("climate_model_2017.png")
NSData *imageData = UIImagePNGRepresentation(image);
[imageData writeToFile:path atomically:YES];
where path is the name of the file you want to write it to.
First you should get the Documents directory
/* create path to cache directory inside the application's Documents directory */
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *filePath = [[paths objectAtIndex:0] stringByAppendingPathComponent:#"fileName"];
Then you should save the photo to the file
NSData *photoData = UIImageJPEGRepresentation(photoImage, 1);
[photoData writeToFile:filePath atomically:YES];
In Swift 4.2:
// Create path.
let paths = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask)
if let filePath = paths.first?.appendingPathComponent("MyImageName.png") {
// Save image.
do {
try image.pngData()?.write(to: filePath, options: .atomic)
} catch {
// Handle the error
}
}
In Swift 4:
// Create path.
let paths = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask)
if let filePath = paths.first?.appendingPathComponent("MyImageName.png") {
// Save image.
do {
try UIImagePNGRepresentation(image)?.write(to: filePath, options: .atomic)
}
catch {
// Handle the error
}
}
I want the user to select any file present in her/his iPhone so that it’s used as an e-mail attachment. For this purpose, I want to show the list of all files and folders present in iPhone. But how would I get the list of those files? Is there any way to get that list?
Take into account that your app runs in a sandbox and would not be able to get any folder/file outside of that sandbox.
ObjectiveC
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSFileManager *manager = [NSFileManager defaultManager];
NSArray *fileList = [manager contentsOfDirectoryAtPath:documentsDirectory error:nil];
for (NSString *s in fileList){
NSLog(#"%#", s);
}
Swift 4
guard let documentsDirectory = try? FileManager().url(for: .documentDirectory, in: .userDomainMask, appropriateFor: nil, create: true) else { return }
guard let fileEnumerator = FileManager.default.enumerator(at: documentsDirectory, includingPropertiesForKeys: nil, options: FileManager.DirectoryEnumerationOptions()) else { return }
while let file = fileEnumerator.nextObject() {
print(file)
}
Here's the slowest(?) approach:
NSFileManager * fileManager = [NSFileManager new];
NSArray * subpaths = [fileManager subpathsAtPath:path];
but that should at least point you to a more specialized implementation for your needs.
Slightly lower level abstractions which allow you to enumerate on demand include NSDirectoryEnumerator and CFURLEnumerator. Depending on the depth of the directory, these have the potential to save much unnecessary interactions with the filesystem, compared to -[NSFileManager subpathsAtPath:].
You can use NSDirectoryEnumerator via NSFileManager.enumeratorAtPath
From the docs:
NSString *docsDir = [NSHomeDirectory() stringByAppendingPathComponent: #"Documents"];
NSFileManager *localFileManager=[[NSFileManager alloc] init];
NSDirectoryEnumerator *dirEnum =
[localFileManager enumeratorAtPath:docsDir];
NSString *file;
while ((file = [dirEnum nextObject])) {
if ([[file pathExtension] isEqualToString: #"doc"]) {
// process the document
[self scanDocument: [docsDir stringByAppendingPathComponent:file]];
}
}
swift 3
let fileManager:FileManager = FileManager()
let files = fileManager.enumerator(atPath: NSHomeDirectory())
while let file = files?.nextObject() {
print("Files::",file)
}
I'm an author of FileExplorer control which is a file browser for iOS and fulfills most of your requirements. Note that it allows you to browse only those files and directories that are placed inside your sandbox.
Here are some of the features of my control:
Possibility to choose files or/and directories if there is a need for that
Possiblity to remove files or/and directories if there is a need for that
Built-in search functionality
View Audio, Video, Image and PDF files.
Possibility to add support for any file type.
You can find my control here.
In my iphone application,i have used sqlite3 for storing the data.
how to get the size of the database using the iphone functionality?
if anybody has any code or any useful link or any other resolution,which would be appreciated.
Thanks,
Mishal Shah
You can use the following code (drawn from my answer to this question) to determine both your database's size and the free space on the filesystem:
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *persistentStorePath = [documentsDirectory stringByAppendingPathComponent:#"database.sqlite"];
NSError *error = nil;
NSDictionary *fileAttributes = [[NSFileManager defaultManager] attributesOfItemAtPath:persistentStorePath error:&error];
NSLog(#"Persistent store size: %# bytes", [fileAttributes objectForKey:NSFileSize]);
NSDictionary *fileSystemAttributes = [[NSFileManager defaultManager] attributesOfFileSystemForPath:persistentStorePath error:&error];
NSLog(#"Free space on file system: %# bytes", [fileSystemAttributes objectForKey:NSFileSystemFreeSize]);
This assumes that your database is called "database.sqlite" and is stored at the root of your application's documents directory.
Try the following, this could help you
- (NSString *)applicationDocumentsDirectory {
return [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];
}
- (void) logSqlliteStoreSize
{
NSString *yourSqlLiteFileName = #"YOURDATABASE_NAME.sqlite";
NSString *yourSqlLitePath = [[self applicationDocumentsDirectory] stringByAppendingPathComponent: yourSqlLiteFileName];
NSError *error;
NSDictionary *storeAttributesOfItemAtPath = [[NSFileManager defaultManager] attributesOfItemAtPath:yourSqlLitePath error:&error];
// here you should test for errors, this is a simplified version
// the next log will show much information about your sqlite file
// including the filesize
NSLog(#"storeAttributesOfItemAtPath=%#", storeAttributesOfItemAtPath);
}
You can find the database file, of the application in the iPhone simulator, in
~/Library/Application Support/iPhone Simulator/User/Applications/*a long number*/Documents/
If you have a jail broken phone you can SSH into it and find the applications folder where it will also be in a /Applications/*<a long number>*/Documents/ folder.
I just want to create new folders in the documents folder of my iPhone app.
Does anybody know how to do that?
Appreciate your help!
I do that the following way:
NSError *error;
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0]; // Get documents folder
NSString *dataPath = [documentsDirectory stringByAppendingPathComponent:#"/MyFolder"];
if (![[NSFileManager defaultManager] fileExistsAtPath:dataPath])
[[NSFileManager defaultManager] createDirectoryAtPath:dataPath withIntermediateDirectories:NO attributes:nil error:&error]; //Create folder
I don't have enough reputation to comment on Manni's answer, but [paths objectAtIndex:0] is the standard way of getting the application's Documents Directory
http://developer.apple.com/library/ios/documentation/iPhone/Conceptual/iPhoneOSProgrammingGuide/StandardBehaviors/StandardBehaviors.html#//apple_ref/doc/uid/TP40007072-CH4-SW6
Because the
NSSearchPathForDirectoriesInDomains
function was designed originally for
Mac OS X, where there could be more
than one of each of these directories,
it returns an array of paths rather
than a single path. In iOS, the
resulting array should contain the
single path to the directory. Listing
3-1 shows a typical use of this
function.
Listing 3-1 Getting the path to the
application’s Documents directory
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
Swift 3 Solution:
private func createImagesFolder() {
// path to documents directory
let documentDirectoryPath = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true).first
if let documentDirectoryPath = documentDirectoryPath {
// create the custom folder path
let imagesDirectoryPath = documentDirectoryPath.appending("/images")
let fileManager = FileManager.default
if !fileManager.fileExists(atPath: imagesDirectoryPath) {
do {
try fileManager.createDirectory(atPath: imagesDirectoryPath,
withIntermediateDirectories: false,
attributes: nil)
} catch {
print("Error creating images folder in documents dir: \(error)")
}
}
}
}
I don't like "[paths objectAtIndex:0]" because if Apple adds a new folder starting with "A", "B" oder "C", the "Documents"-folder isn't the first folder in the directory.
Better:
NSString *dataPath = [NSHomeDirectory() stringByAppendingPathComponent:#"Documents/MyFolder"];
if (![[NSFileManager defaultManager] fileExistsAtPath:dataPath])
[[NSFileManager defaultManager] createDirectoryAtPath:dataPath withIntermediateDirectories:NO attributes:nil error:&error]; //Create folder
The Swift 2 solution:
let documentDirectoryPath: String = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true).first!
if !NSFileManager.defaultManager().fileExistsAtPath(documentDirectoryPath) {
do {
try NSFileManager.defaultManager().createDirectoryAtPath(documentDirectoryPath, withIntermediateDirectories: false, attributes: nil)
} catch let createDirectoryError as NSError {
print("Error with creating directory at path: \(createDirectoryError.localizedDescription)")
}
}
This works fine for me,
NSFileManager *fm = [NSFileManager defaultManager];
NSArray *appSupportDir = [fm URLsForDirectory:NSDocumentsDirectory inDomains:NSUserDomainMask];
NSURL* dirPath = [[appSupportDir objectAtIndex:0] URLByAppendingPathComponent:#"YourFolderName"];
NSError* theError = nil; //error setting
if (![fm createDirectoryAtURL:dirPath withIntermediateDirectories:YES
attributes:nil error:&theError])
{
NSLog(#"not created");
}
Swift 4.0
let paths = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true)
// Get documents folder
let documentsDirectory: String = paths.first ?? ""
// Get your folder path
let dataPath = documentsDirectory + "/yourFolderName"
if !FileManager.default.fileExists(atPath: dataPath) {
// Creates that folder if not exists
try? FileManager.default.createDirectory(atPath: dataPath, withIntermediateDirectories: false, attributes: nil)
}
Following code may help in creating directory :
-(void) createDirectory : (NSString *) dirName {
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0]; // Fetch path for document directory
dataPath = (NSMutableString *)[documentsDirectory stringByAppendingPathComponent:dirName];
NSError *error;
if (![[NSFileManager defaultManager] createDirectoryAtPath:dataPath withIntermediateDirectories:NO attributes:nil error:&error]) {
NSLog(#"Couldn't create directory error: %#", error);
}
else {
NSLog(#"directory created!");
}
NSLog(#"dataPath : %# ",dataPath); // Path of folder created
}
Usage :
[self createDirectory:#"MyFolder"];
Result :
directory created!
dataPath : /var/mobile/Applications/BD4B5566-1F11-4723-B54C-F1D0B23CBC/Documents/MyFolder
Swift 1.2 and iOS 8
Create custom directory (name = "MyCustomData") inside the documents directory but only if the directory does not exist.
// path to documents directory
let documentDirectoryPath = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true).first as! String
// create the custom folder path
let myCustomDataDirectoryPath = documentDirectoryPath.stringByAppendingPathComponent("/MyCustomData")
// check if directory does not exist
if NSFileManager.defaultManager().fileExistsAtPath(myCustomDataDirectoryPath) == false {
// create the directory
var createDirectoryError: NSError? = nil
NSFileManager.defaultManager().createDirectoryAtPath(myCustomDataDirectoryPath, withIntermediateDirectories: false, attributes: nil, error: &createDirectoryError)
// handle the error, you may call an exception
if createDirectoryError != nil {
println("Handle directory creation error...")
}
}