I am creating files with the following code
NSString *docPath = [NSHomeDirectory() stringByAppendingPathComponent:#"Documents"];
NSString *filename = #"xyz123.data";
docPath = [NSString stringWithFormat:#"%#/%#", docPath, filename];
NSError *error = nil;
[data writeToFile:docPath options:0 error:&error];
To delete files I use the following
NSFileManager *manager = [NSFileManager defaultManager];
NSError *error = nil;
NSString *path = #"xyz123.data";
//NSString *path = #"Documents/xyz123.data";
[manager path error:&error];
But neither the first nor the second path seem to work, I always get the error "no such file or directory".
You used NSHomeDirectory() stringByAppendingPathComponent in the file creation, but not in either path when you try to delete the file. Try:
[manager removeItemAtPath:[NSHomeDirectory() stringByAppendingPathComponent:#"Documents/xyz123.data"] error:&error]
Try this:
NSString *docPath = [NSHomeDirectory() stringByAppendingPathComponent:#"Documents"];
NSString *filePath = [docPath stringByAppendingPathComponent:#"xyz123.data"];
NSError *error = nil;
[data writeToFile:filePath options:0 error:&error];
[[NSFileManager defaultManager] removeItemAtPath:filePath error:&error];
Related
I am trying to enumerate files and folders at root level
(/Users/Myname/Desktop or /Users/Myname/Documents),[enumarator nextobject] always gives nil value.
How can i solve this issue.
NSDirectoryEnumerator* enumerator = [[NSFileManager defaultManager] enumeratorAtPath:#"/Users/Myname/Desktop"];
NSString *content= [enumerator nextObject];//content always nil.
Try this:
NSFileManager *fileManager = [NSFileManager defaultManager];
NSDirectoryEnumerator * emuerator = [fileManager enumeratorAtPath:#"/usr/Myname/Desktop"];
NSString *filename; while ((filename = [emuerator
nextObject]))
{
NSLog (#"file! %#", filename);
}
OR
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSFileManager *manager = [[NSFileManager alloc] init];
NSDirectoryEnumerator *emuerator= [manager enumeratorAtPath: #"/usr/Myname/Desktop"];
for (NSString *filename in emuerator) {
// Do something with file
}
[manager release];
Beginner at Objective C here, I have this code:
//Path of management log file
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSLibraryDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *urlPath= [documentsDirectory stringByAppendingPathComponent:#"Logs/log.txt"];
NSURL *source = [NSURL fileURLWithPath:urlPath];
//Destination
NSURL * destination = [self.pathControl URL];
//Move file from source to that destination directory.
[[NSFileManager defaultManager] copyItemAtURL:source toURL:destination error:nil];
The problem is that it doesn't do anything. It can compile, but nothing happens. Am I using copyItemAtURL method wrong?
Use to error indicators to understand errors:
NSError *error;
BOOL status = [[NSFileManager defaultManager] copyItemAtURL:source toURL:destination error:&error];
if (status == NO ) {
NSLog(#"errorL %#", error);
}
I'm new to IOS development. I'm developing an app which involves downloading files and saving that to apps temp folder and I dont know how to do that my current code is given below
NSURL *tmpDirURL = [NSURL fileURLWithPath:NSTemporaryDirectory() isDirectory:YES];
NSLog(#"%#",tmpDirURL);
NSString *myString = [tmpDirURL absoluteString];
for(int i=0;i<responseArray.count;i++){
ASIHTTPRequest *saveUrl = [ASIHTTPRequest requestWithURL:responseArray[i]];
[saveUrl setDownloadDestinationPath:myString];
[request startSynchronous];
}
NSError * error;
NSArray * directoryContents = [[NSFileManager defaultManager] contentsOfDirectoryAtPath:myString error:&error];
NSLog(#"%#",directoryContents);
The response array contain a list of URL for downloading files. I know something wrong with my code but I cant find out that error please help me to solve this problem
I found the solution'
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *htmlFilePath = [documentsDirectory stringByAppendingPathComponent:fileName];
[data writeToFile:htmlFilePath atomically:YES];
When downloadDestinationPath is set, the result of this request will be downloaded to the file at this location. If downloadDestinationPath is not set, download data will be stored in memory
NSURL *tmpDirURL = [NSURL fileURLWithPath:NSTemporaryDirectory() isDirectory:YES];
NSLog(#"%#",tmpDirURL);
NSString *myString = [tmpDirURL absoluteString];
for(int i=0;i<responseArray.count;i++){
ASIHTTPRequest *saveUrl = [ASIHTTPRequest requestWithURL:responseArray[i]];
[saveUrl setDownloadDestinationPath:[myString stringByAppendingPathComponent:[NSString stringWithFormat:#"%i",i ]]; // for each file set a new location inside tmp
[request startSynchronous];
}
NSError * error;
NSArray * directoryContents = [[NSFileManager defaultManager] contentsOfDirectoryAtPath:myString error:&error];
NSLog(#"%#",directoryContents);
Hi I want to save an image to a directory, I pass the NSData and do what I think will save the file in a directory I create but the problem is that it doesn't save. This is what I have so far. Why doesn't the initWithContentsOfURL:encoding:error: work, it returns null but the other method I used works? The main problem is WRITETOURL which returns a 0 which i think means that the information wasn't stored properly, any tips?
NSFileManager *fm = [[NSFileManager alloc] init];
NSArray * directoryPaths = [fm URLsForDirectory:NSCachesDirectory inDomains:NSUserDomainMask];
NSLog(#"%#", directoryPaths);
NSURL* dirPath = nil;
dirPath = [[directoryPaths objectAtIndex:0] URLByAppendingPathComponent:[NSString stringWithFormat:#"photos.jpeg"]];
NSError* theError = nil;
[fm createDirectoryAtURL:dirPath withIntermediateDirectories:YES attributes:nil error:&theError];
UIImage* photoToStore = [UIImage imageWithData:photoToSave];
NSString *pathContainingPhoto = [[NSString alloc] initWithFormat:#"%#.jpeg", UIImageJPEGRepresentation(photoToStore, 1.0)];
NSError *error = nil;
BOOL OK = [pathContainingPhoto writeToURL:dirPath atomically:YES encoding:NSUTF8StringEncoding error:&error];
NSLog(#"OK = %d", OK); //Returns 0
NSLog(#"%#", dirPath);
//WHY DOESNT THIS VERSION WORK?
// NSString *pathToFile = [[NSString alloc] initWithContentsOfURL:dirPath encoding:NSUTF8StringEncoding error:&error];
NSLog(#"%#", pathToFile);
NSString* pathToFile = [NSString stringWithContentsOfURL:dirPath encoding:nil error:nil];
NSArray *dirContents = [fm contentsOfDirectoryAtPath:pathToFile error:nil];
NSLog(#"%#", dirContents);
Do like this and int count in .h file and set its intial value count = 0; in viewDidLoad:
NSString *stringPath = [[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)objectAtIndex:0]stringByAppendingPathComponent:[NSString stringWithFormat:#"Image_%d.png",count];
error = nil;
if (![[NSFileManager defaultManager] fileExistsAtPath:stringPath]) // removing item it already exuts
{
[[NSFileManager defaultManager] removeItemAtPath:stringPath error:&error];
}
if(photoToSave) // nsdata of image that u have
{
[photoToSave writeToFile:stringPath atomically:YES];
}
count++; // maintaining count of images
I have plenty of empty temporary folders in app's Document folder.
How to delete them all?
I tried:
NSArray *folders = [[NSFileManager defaultManager]contentsOfDirectoryAtURL:[self applicationDocumentsDirectory] includingPropertiesForKeys:[NSArray arrayWithObject:#"NSURLIsDirectoryKey"] options:0 error:nil];
if (folders) {
for (NSURL *url in folders) {
[[NSFileManager defaultManager]removeItemAtURL:url error:nil];
}
}
but it deletes all, not only folders
This snippet of code deletes only directiories that are empty.
NSFileManager *fileManager = [[NSFileManager alloc] init];
NSString *documentsDirectory = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
NSArray *files = [fileManager contentsOfDirectoryAtPath:documentsDirectory error:nil];
for (NSString *file in files) {
NSString *fullPath = [documentsDirectory stringByAppendingPathComponent:file];
NSError *error;
if ([[fileManager contentsOfDirectoryAtPath:fullPath error:&error] count]==0) {
// check if number of files == 0 ==> empty directory
if (!error) {
// check if error set (fullPath is not a directory and we should leave it alone)
[fileManager removeItemAtPath:fullPath error:nil];
}
}
}
If you simply want to delete all directories (both empty and not empty) the snippet can be simplified into this:
NSFileManager *fileManager = [[NSFileManager alloc] init];
NSString *documentsDirectory = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
NSArray *files = [fileManager contentsOfDirectoryAtPath:documentsDirectory error:nil];
for (NSString *file in files) {
NSString *fullPath = [documentsDirectory stringByAppendingPathComponent:file];
if ([fileManager contentsOfDirectoryAtPath:fullPath error:nil])
[fileManager removeItemAtPath:fullPath error:nil];
}