I am trying to save the string in .txt file and wants to see that .txt file in Files app. It is possible to save and read the file in documents directory but I am struggling to save and see in Files app.
Your help will be appreciated.
You can create the file with:
NSString* filePath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
NSString* fileName = #"file.txt";
NSString* fileAtPath = [filePath stringByAppendingPathComponent:fileName];
if (![[NSFileManager defaultManager] fileExistsAtPath:fileAtPath]) {
[[NSFileManager defaultManager] createFileAtPath:fileAtPath contents:nil attributes:nil];
}
And read it with:
NSString *filePath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
NSString *fileName = #"file.txt";
NSString *pathDocuments = [filePath stringByAppendingPathComponent:fileName];
After having the file path then it is up to you to parse it.
Related
I'm trying to save PDF file to local storage.
I save the file this way and it seems to me that everything is fine.
//Get path directory
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
//Create PDF_Documents directory
documentsDirectory = [documentsDirectory stringByAppendingPathComponent:#"PDF_Documents"];
[[NSFileManager defaultManager] createDirectoryAtPath:documentsDirectory withIntermediateDirectories:YES attributes:nil error:nil];
filePath = [NSString stringWithFormat:#"%#/%#", documentsDirectory, tastingName];
[tastingNotesData writeToFile:filePath atomically:YES];
This way I try to get the file
tastingPath = /var/mobile/Containers/Data/Application/4255D8B0-33F5-47AA-ABFA-CCC3691DA033/Documents/PDF_Documents/39e0afcdb56240c2a65ab9e136377b32.pdf;
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *path = [documentsDirectory stringByAppendingPathComponent:[self.productModel.tastingPath lastPathComponent]];
NSData *data2 = [[NSFileManager defaultManager] contentsAtPath:path];
NSLog(#"tasting notes %#", data2);
At the end file will be displayed in the UIWebView.
What am I doing wrong?
The problem is simple. In your attempt to read the PDF file, you don't include the PDF_Documents part of the path. Or you are not appending the filename. Can't be 100% sure which part is wrong. It depends on what the value of [self.productModel.tastingPath lastPathComponent] is.
I have implemented the logic of writing files into document directory.
NSData *pngData = UIImagePNGRepresentation([UIImage imageNamed:#"logo_icon_login.png"]);
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsPath = [paths objectAtIndex:0];
NSString *filePath = [documentsPath stringByAppendingPathComponent:#"image.png"];
if ([[NSFileManager defaultManager] isWritableFileAtPath:filePath])
{
[pngData writeToFile:filePath atomically:YES];
}
else
{
NSLog(#"Not writable.");
}
Now the problem is in some devices it says Not writable. Is there any permission should I need before writing files in the documents directory?
Create a folder namely images and than put the image inside. It could be root directory issue.
Try this:
NSString *filePath = [documentsPath stringByAppendingPathComponent:#"images/image.png"];
I have a .txt file with a small password in it. I would like to change that file's text. How can I do that? I can get the file's text using :
NSString *passWord = [NSString stringWithContentsOfFile:[[NSBundle mainBundle] pathForResource:#"password" ofType:#"txt"] encoding:NSUTF8StringEncoding error:NULL];
But I can't seem to find a way to replace the contents of the file with a string.
The way to do this is to remove old file and create new one.
Removing existing file
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *filePath = [documentsDirectory stringByAppendingPathComponent:#"myFile.txt"];
NSFileManager *fileManager = [NSFileManager defaultManager];
if([fileManager fileExistsAtPath:filePath])
{
[fileManager removeItemAtPath:filePath error:&error];
}
To crate new file with your new password write password data while creating file as:
[createFileAtPath:path contents:[NSData data] attributes:nil]
I have been having an issue and I can't find anything about it.
I got some code to write files in the Documents folder with iOS. Checked the Apple documentation seems it's where I want to put the file for it to be available the next launch.
Here's the code I'm using:
- (void) writeToTextFile:(NSString *)logMessage inFile:(NSString *)fileName
{
//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 *filePath = [NSString stringWithFormat:#"%#/%#.txt", documentsDirectory, fileName];
NSLog(#"TEST path: %#", filePath);
//save logMessage to the documents directory
[logMessage writeToFile:filePath atomically:YES encoding:NSStringEncodingConversionAllowLossy error:nil];
}
Now I'm using unit tests on this methods. It was working fine on the iOS 7.0.3 simulator, but when I switched to iOS 6.0 it doesn't work anymore.
In fact I found out that there was no Documents folder in "Application Support/iPhone Simulator/6.0/" but there's one in the 7.0.3 folder.
I can't really find any differences on how writing to a file should be handled between 6 and 7. Should I test if the folder exists then create it if it's not there?
This works for me
NSString *string = #"Text to save";
NSString *filePath = #"filerecord.txt";
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *docDir = [paths objectAtIndex:0];
NSString *filePath = [docDir stringByAppendingPathComponent:filePath];
[string writeToFile:filePath atomically:YES];
UPDATE
Create Documents directory if not exists
NSFileManager *fileManager = [NSFileManager defaultManager];
NSError *error;
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
if (![fileManager fileExistsAtPath:documentsDirectory]) {
[fileManager createDirectoryAtPath:documentsDirectory withIntermediateDirectories:NO attributes:nil error:&error];
}
NSString *string = #"Text to save";
NSString *filePath = #"filerecord.txt";
NSString *filePath = [documentsDirectory stringByAppendingPathComponent:filePath];
[string writeToFile:filePath atomically:YES];
So in my app I have a bunch of data that I'd like to write to a log file, and then display it within a UITextView when I click a button. I know how to toggle the UITextView, but I have no idea how to create and update a log file (in the local filesystem). Thanks for any help.
The basic idea is that you create the file, and append to it every time you log a new line. You can do it quite easily like this:
Writing to the file:
NSString *content = #"This is my log";
//Get the file path
NSString *documentsDirectory = [NSSearchPathForDirectoriesInDomains (NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
NSString *fileName = [documentsDirectory stringByAppendingPathComponent:#"myFileName.txt"];
//create file if it doesn't exist
if(![[NSFileManager defaultManager] fileExistsAtPath:fileName])
[[NSFileManager defaultManager] createFileAtPath:fileName contents:nil attributes:nil];
//append text to file (you'll probably want to add a newline every write)
NSFileHandle *file = [NSFileHandle fileHandleForUpdatingAtPath:fileName];
[file seekToEndOfFile];
[file writeData:[content dataUsingEncoding:NSUTF8StringEncoding]];
[file closeFile];
Reading:
//get file path
NSString *documentsDirectory = [NSSearchPathForDirectoriesInDomains (NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
NSString *fileName = [documentsDirectory stringByAppendingPathComponent:#"myFileName.txt"];
//read the whole file as a single string
NSString *content = [NSString stringWithContentsOfFile:fileName encoding:NSUTF8StringEncoding error:nil];
I thought was a class out there to do this automatically as after no luck created my own.
NSLogger is a lightweight class for iOS versions 3.0 and above. It allows developers to easily log different 'events' over time which are locally stored as a .txt file.
https://github.com/northernspark/NSLogger