How can i delete data from NSDocumentDirectory which i have saved using the following code.
NSArray *paths = NSSearchPathForDirectoriesInDomains (NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *fullFileName2 = [NSString stringWithFormat:#"%#nameArray", documentsDirectory];
nameArray=[[NSMutableArray alloc]initWithContentsOfFile:fullFileName2];
[nameArray addObject:nameField.text];
[nameArray writeToFile:fullFileName2 atomically:NO];
try this :
NSArray *paths = NSSearchPathForDirectoriesInDomains (NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *fullFileName2 = [NSString stringWithFormat:#"%#nameArray", documentsDirectory];
[[NSFileManager defaultManager] removeItemAtPath:fullFileName2 error: NULL];
Try this,
NSArray *paths = NSSearchPathForDirectoriesInDomains (NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *fullFileName2 = [nameArray objectAtIndex:0];
[[NSFileManager defaultManager] removeItemAtPath:fullFileName2 error: NULL];
Related
Can someone explain me why my code doesn't work?
//get the documents directory:
NSArray *paths = NSSearchPathForDirectoriesInDomains
(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
//make a file name to write the data to using the
//documents directory:
NSString *fullFileName = [NSString stringWithFormat:#"%#/subscriptions", documentsDirectory];
[dataReply writeToFile:fullFileName atomically:NO];
NSData *getData=[[NSData alloc]initWithContentsOfFile:fullFileName];
infact if I try
NSString *string = [[NSString alloc] initWithData:getData encoding:NSASCIIStringEncoding];
while if I load myData without save it to my device it works! (So I'm sure that my data is not empty)
Try This,
NSArray *paths = NSSearchPathForDirectoriesInDomains
(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
//make a file name to write the data to using the
//documents directory:
NSString *fullFileName = [NSString stringWithFormat:#"%#/subscriptions", documentsDirectory];
[dataReply writeToFile:fullFileName atomically:NO];
Nsdata *getData=[fullFileName dataUsingEncoding:NSUTF8StringEncoding];
i try to delete Dirty Memory and u se VMTRACE but i dont know why this code have dirty memory
NSString* documentsPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *path = [documentsDirectory stringByAppendingPathComponent:#"Info.plist"];
NSDictionary *dict =[[[NSDictionary alloc] initWithContentsOfFile:path] autorelease];
I can't getting my stored data.... This is the code:
if ([string isEqualToString:#""]) {
//RECUPERO DATA
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *pathToDocuments=[paths objectAtIndex:0];
pathToDocuments=[pathToDocuments stringByAppendingString:#"getSubscriptionsListShowOnlyWithUnreadFeeds.txt"];
NSLog(pathToDocuments);
dataReply=[[NSData alloc] initWithContentsOfFile:pathToDocuments];
NSString *string = [[NSString alloc] initWithData:dataReply encoding:NSASCIIStringEncoding];
NSLog(#"string recuperata %#",string);
}
if ([string isEqualToString:#""]==NO) {
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *pathToDocuments=[paths objectAtIndex:0];
pathToDocuments=[pathToDocuments stringByAppendingString:#"getSubscriptionsListShowOnlyWithUnreadFeeds.txt"];
NSLog(pathToDocuments);
[dataReply writeToFile:pathToDocuments atomically:YES];}
Is there something wrong?
EDIT
No bugs no crashes but the NSLog(#"string recuperata %#",string); prints an empty string! (data are stored in the device because I had running at least one time my app when string!= empty
Thanks
I think there is a else missing on the second if. I'm not sure if that is what you wanted or if it is a typo on your part. check if that is the problem.
if ([string isEqualToString:#""]) {
//RECUPERO DATA
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *pathToDocuments=[paths objectAtIndex:0];
pathToDocuments=[pathToDocuments stringByAppendingString:#"getSubscriptionsListShowOnlyWithUnreadFeeds.txt"];
NSLog(pathToDocuments);
dataReply=[[NSData alloc] initWithContentsOfFile:pathToDocuments];
NSString *string = [[NSString alloc] initWithData:dataReply encoding:NSASCIIStringEncoding];
NSLog(#"string recuperata %#",string);
} else if ([string isEqualToString:#""]==NO) {
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *pathToDocuments=[paths objectAtIndex:0];
pathToDocuments=[pathToDocuments stringByAppendingString:#"getSubscriptionsListShowOnlyWithUnreadFeeds.txt"];
NSLog(pathToDocuments);
[dataReply writeToFile:pathToDocuments atomically:YES];
Try changing to NSUTF8StringEncoding if you are unsure about the encoding, usually it works.
if ([string length]<=0) {
//RECUPERO DATA
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *pathToDocuments=[paths objectAtIndex:0];
pathToDocuments=[pathToDocuments stringByAppendingString:#"getSubscriptionsListShowOnlyWithUnreadFeeds.txt"];
NSLog(pathToDocuments);
dataReply=[[NSData alloc] initWithContentsOfFile:pathToDocuments];
NSString *string = [[NSString alloc] initWithData:dataReply encoding:NSASCIIStringEncoding];
NSLog(#"string recuperata %#",string);
}
else {
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *pathToDocuments=[paths objectAtIndex:0];
pathToDocuments=[pathToDocuments stringByAppendingString:#"getSubscriptionsListShowOnlyWithUnreadFeeds.txt"];
NSLog(pathToDocuments);
[dataReply writeToFile:pathToDocuments atomically:YES];
}
I would like to save a file in my application which I have created with code:
NSArray *arrayPathsForImg =
NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,
NSUserDomainMask,
YES);
NSString *pathForImg = [arrayPathsForImg objectAtIndex:0];
pathForImg = [pathForImg stringByAppendingPathComponent:#"a.txt"];
[self.importUrlData writeToFile:pathForImg atomically:YES];
Now I want to download it to my iPhone?
If you meant "read" the file:
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *filePath = [documentsDirectory stringByAppendingPathComponent:#"a.txt"];
And now use a initWithContentsOfFile: method. For example I used the code above to read from a property list and used the following code to get the data into a NSDictionary:
NSDictionary *dict = [[NSDictionary alloc] initWithContentsOfFile:filePath];
I am trying to read a .txt file from my documents directory in the form of NSString. Any idea how to read the file into NSString?
Thank you...
Use NSString's stringWithContentsOfFile: method.
NSString *fileContents = [NSString stringWithContentsOfFile:#"some/file.txt"];
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *myPathDocs = [documentsDirectory stringByAppendingPathComponent:#"myfile.txt"];
if (![[NSFileManager defaultManager] fileExistsAtPath:myPathDocs])
{
NSString *myPathInfo = [[NSBundle mainBundle] pathForResource:#"myfile" ofType:#"txt"];
NSFileManager *fileManager = [NSFileManager defaultManager];
[fileManager copyItemAtPath:myPathInfo toPath:myPathDocs error:NULL];
}
//Load from File
NSString *myString = [[NSString alloc] initWithContentsOfFile:myPathDocs encoding:NSUTF8StringEncoding error:NULL];
This worked for me
Anyway, thank you all..
Hopefully this is what you're after :
NSString *myString = [[NSString alloc] initWithContentsOfFile:#"pathToFile"];
I usually have it looking in the Applications Document directory.
Hope this helps...
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *fileContents=[documentsDirectory stringByAppendingPathComponent:#"file.txt"];
hAPPY cODING...
I think this is the best way to read .txt file from DocumentDirectory.
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *filePath = [documentsDirectory stringByAppendingPathComponent:#"txtFile.txt"];
NSString *content = [NSString stringWithContentsOfFile:filePath encoding:NSUTF8StringEncoding error:NULL];
I hope this will work for you!!