im getting a "CFDictionaryAddValue(): immutable collection 0xd5aea0 given to mutating function"
error when i try to write a string to a file using the follwowing code
NSString *xmlString = [NSString stringWithString:xmlData];
NSError *error = nil;
if ([xmlString writeToFile:filePath atomically:NO encoding:NSASCIIStringEncoding error:&error])
xmlData was a mutable string but xmlString is not.
any ideas?
It works for me in cocoa.
NSString * xmlData = #"This is some random string";
NSString * xmlString = [NSString stringWithString:xmlData];
NSError * error = nil;
if (![xmlString writeToFile:#"data.txt"
atomically:NO
encoding:NSASCIIStringEncoding
error:&error])
{
NSLog(#"writeToFile failed: %#", error);
}
I would check:
How do you get xmlData? Is it a NSString?
Do you specify file path within your app bundle? You will not be able to write outside your application directory apart from Documents (?) I think.
This is how you would specify file in Documents directory:
// Documents directory
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,
NSUserDomainMask, YES);
NSString *documentsPath = [paths objectAtIndex:0];
// <Application Home>/Documents/foo.plist
NSString *fooPath = [documentsPath stringByAppendingPathComponent:#“foo.plist”];
Related
I am trying to save a plain text file to the Documents directory in iOS 7. Here is my code:
//Saving file
NSFileManager *fileManager = [[NSFileManager alloc] init];
NSArray *urls = [fileManager URLsForDirectory:NSDocumentDirectory inDomains:NSUserDomainMask];
NSString *url = [NSString stringWithFormat:#"%#", urls[0]];
NSString *someText = #"Random Text To Be Saved";
NSString *destination = [url stringByAppendingPathComponent:#"File.txt"];
NSError *error = nil;
BOOL succeeded = [someText writeToFile:destination atomically:YES encoding:NSUTF8StringEncoding error:&error];
if (succeeded) {
NSLog(#"Success at: %#",destination);
} else {
NSLog(#"Failed to store. Error: %#",error);
}
Here is the error I am getting:
2013-10-13 16:09:13.848 SavingFileTest[13675:a0b] Failed to store. Error: Error Domain=NSCocoaErrorDomain Code=4 "The operation couldn’t be completed. (Cocoa error 4.)" UserInfo=0x1090895f0 {NSFilePath=file:/Users/Username/Library/Application%20Support/iPhone%20Simulator/7.0-64/Applications/F5DA3E33-80F7-439B-A9AF-E8C7FC4E1630/Documents/File.txt, NSUserStringVariant=Folder, NSUnderlyingError=0x10902aeb0 "The operation couldn’t be completed. No such file or directory"}
I can't figure out why I am getting this error running on the simulator. This works if I use the NSTemporaryDirectory().
From Apple's Xcode Template:
/**
Returns the URL to the application's Documents directory.
*/
- (NSURL *)applicationDocumentsDirectory {
return [[[NSFileManager defaultManager] URLsForDirectory:NSDocumentDirectory
inDomains:NSUserDomainMask] lastObject];
}
You can save like this:
NSString *path = [[self applicationDocumentsDirectory].path
stringByAppendingPathComponent:#"fileName.txt"];
[sampleText writeToFile:path atomically:YES
encoding:NSUTF8StringEncoding error:nil];
Mundi's answer in Swift:
let fileName = "/File Name.txt"
let filePath = self.applicationDocumentsDirectory().path?.stringByAppendingString(fileName)
do {
try strFileContents.writeToFile(filePath!, atomically: true, encoding: NSUTF8StringEncoding)
print(filePath)
}
catch {
// error saving file
}
func applicationDocumentsDirectory() -> NSURL {
return NSFileManager.defaultManager().URLsForDirectory(NSSearchPathDirectory.DocumentDirectory, inDomains: NSSearchPathDomainMask.UserDomainMask).last!
}
-(void)writeATEndOfFile:(NSString *)content2
{
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 *fileName = [NSString stringWithFormat:#"%#/textfile.txt",
documentsDirectory];
if([[NSFileManager defaultManager] fileExistsAtPath:fileName])
{
NSFileHandle *fileHandle = [NSFileHandle fileHandleForWritingAtPath:fileName];
[fileHandle seekToEndOfFile];
NSString *writedStr = [[NSString alloc]initWithContentsOfFile:fileName encoding:NSUTF8StringEncoding error:nil];
content2 = [content2 stringByAppendingString:#"\n"];
writedStr = [writedStr stringByAppendingString:content2];
[writedStr writeToFile:fileName
atomically:NO
encoding:NSStringEncodingConversionAllowLossy
error:nil];
}
else {
int n = [content2 intValue];
[self writeToTextFile:n];
}
}
-(void) writeToTextFile:(int) value{
//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 *fileName = [NSString stringWithFormat:#"%#/textfile.txt",
documentsDirectory];
//create content - four lines of text
// NSString *content = #"One\nTwo\nThree\nFour\nFive";
NSString *content2 = [NSString stringWithFormat:#"%d",value];
content = [content2 stringByAppendingString:#"\n"];
//save content to the documents directory
[content writeToFile:fileName
atomically:NO
encoding:NSStringEncodingConversionAllowLossy
error:nil];
}
i have 3NSString objects that i want to save to a new file when the app is running.
this will help me for remote debug!
if any one can help me creating the file and save the data to it will be very use full
thanx
You can save the files to the Documents directory, here is how to get the path to that directory:
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *filePath = [documentsDirectory stringByAppendingPathComponent:fileName];
And a sample write statement:
NSError *error;
BOOL status = [string writeToFile:filePath atomically:YES encoding:NSUTF8StringEncoding error:&error];
In the NSString documentation there is method called writeToFile:atomically:encoding:error:.
NSError *error;
[#"Write me to file" writeToFile:#"<filepath>" atomically:YES encoding: NSUTF8StringEncoding error:&error];
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *documentsDirectory = [paths objectAtIndex:0]; // Get documents directory
NSError *error; BOOL succeed = [myString writeToFile:[documentsDirectory stringByAppendingPathComponent:#"myfile.txt"]
atomically:YES encoding:NSUTF8StringEncoding error:&error];
if (!succeed){
// Handle error here }
source.
Here is how to save NSString into Documents folder. Saving other types of data can be also realized that way.
- (void)saveString:(NSString *)stringToSave toDocumentsWithFilename:(NSString *)fileName {
NSString *documentsFolder = [NSHomeDirectory() stringByAppendingPathComponent:#"Documents"];
NSString *path = [documentsFolder stringByAppendingPathComponent:fileName];
[[NSFileManager defaultManager] createFileAtPath:path contents:[stringToSave dataUsingEncoding:NSUTF8StringEncoding] attributes:nil];
}
Usage:
NSString *stringWeWantToSave = #"This is an elephant";
NSString *fileName = [NSString stringWithString:#"savedString.txt"];
[self saveString:stringWeWantToSave toDocumentsWithFilename:fileName];
I am using the following code in iPhone to write a string into the file that is stored in my iPhone Project Resource Folder. When i try to read its reading the data successfully but when i try to write its not writing the file although its aloso not giving me any error.
this is my code:
NSString *myString; //Assuume the string you want to write is this
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *path = [documentsDirectory stringByAppendingPathComponent:#"myfile.txt"];
[myString writeToFile:path atomically:YES];
Please can anybody guide.
- (void) testStringReadWrite {
NSString *myString = #"abcd efgh";
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *path = [documentsDirectory stringByAppendingPathComponent:#"myfile.txt"];
CFShow(path);
NSError *error = nil;
[myString writeToFile:path atomically:YES encoding:NSUTF8StringEncoding error:&error];
if (error) {
NSLog(#"%#",error);
}
NSString *readString = [NSString stringWithContentsOfFile:path encoding:NSUTF8StringEncoding error:&error];
if (error) {
NSLog(#"%#", error);
} else {
CFShow(readString);
}
}
The writeToFile:atomically: has been depredecated in iOS 2.0. Use writeToFile:atomically:encoding:error: instead. You should check the content of the string, for example by NSLog() function. Inappropriate initialization can cause a failure.
NSLog(#"%#", myString);
[myString writeToFile:path atomically:YES encoding:NSUTF8StringEncoding error:NULL];
Just my two cents, coming from OS X, I am used to calling writeToURL() instead of writeToFile(). Turns out, writeToFile() is the one that worked for iOS.
I am trying to write a very basic text string to my documents directory and work from there to later save other files etc.
I am currently stuck with it not writing anything into my Documents directory
(In my viewDidLoad)
NSArray *pathArray = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)
NSString *documentsDirectory = [pathArray objectAtIndex:0];
NSString *textPath = [documentsDirectory stringByAppendingPathComponent:#"file1.txt"];
NSString *text = #"My cool text message";
[[NSFileManager defaultManager] createFileAtPath:textPath contents:nil attributes:nil];
[text writeToFile:textPath atomically:NO encoding:NSUTF8StringEncoding error:NULL];
NSLog(#"Text file data: %#",[[NSFileManager defaultManager] contentsAtPath:textPath]);
This is what gets printed out:
2011-06-27 19:04:43.485 MyApp[5731:707] Text file data: (null)
If I try this, it also prints out null:
NSLog(#"My Documents: %#", [[NSFileManager defaultManager] contentsOfDirectoryAtPath:documentsDirectory error:NULL]);
What have I missed or am I doing wrong while writing to this file?
Might it be something I need to change in my plist or some frameworks/imports needed?
Thanks
[EDIT]
I passed a NSError object through the writeToFile and got this error:
Error: Error Domain=NSCocoaErrorDomain Code=512 "The operation couldn’t be completed. (Cocoa error 512.)" UserInfo=0x12aa00 {NSFilePath=/var/mobile/Applications/887F4691-3B75-448F-9384-31EBF4E3B63E/Documents/file1.txt, NSUnderlyingError=0x14f6b0 "The operation couldn’t be completed. Not a directory"}
[EDIT 2]
This works fine on the simulator but not on my phone :/
Instead of using NSFileManager to get the contents of that file, try using NSString as such:
NSArray *pathArray = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)
NSString *documentsDirectory = [pathArray objectAtIndex:0];
NSString *textPath = [documentsDirectory stringByAppendingPathComponent:#"file1.txt"];
NSError *error = nil;
NSString *str = [NSString stringWithContentsOfFile:textPath encoding:NSUTF8StringEncoding error:&error];
if (error != nil) {
NSLog(#"There was an error: %#", [error description]);
} else {
NSLog(#"Text file data: %#", str);
}
Edit: Added error checking code.
How are you getting documentsDirectory?
You should be using something like this:
NSArray *pathArray = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)
NSString *documentsDirectory = [pathArray lastObject];
Put an NSLog statement after every line where you are setting a variable's value, so that you can inspect those values. This should help you quickly pinpoint where things start to go wrong.
The problem got solved by setting a non standard Bundle ID in die info.plist
I used the Bundle ID from iTunes Connect for this specific app. Now everything works perfectly.
You can also use NSFileHandle for writing data in file and save to document directory:
Create a variable of NSFileHandle
NSFileHandle *outputFileHandle;
use the prepareDataWrittenHandle function with passing file name in parameter with file extension
-(void)prepareDataWrittenHandle:(NSString *)filename
{
//Create Path of file in document directory.
NSString *documentsDirectory = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
NSString *outputFilePath = [documentsDirectory stringByAppendingPathComponent:filename];
//Check file with above name is already exits or not.
if ([[NSFileManager defaultManager] fileExistsAtPath:outputFilePath] == NO) {
NSLog(#"Create the new file at outputFilePath: %#", outputFilePath);
//Create file at path.
BOOL suc = [[NSFileManager defaultManager] createFileAtPath:outputFilePath
contents:nil
attributes:nil];
NSLog(#"Create file successful?: %u", suc);
}
outputFileHandle = [NSFileHandle fileHandleForWritingAtPath:outputFilePath];
}
then write the string value to file as:
//Create a file
[self prepareDataWrittenHandle:#"file1.txt"];
//String to save in file
NSString *text = #"My cool text message";
//Convert NSString to NSData to save data in file.
NSData* data = [text dataUsingEncoding:NSUTF8StringEncoding]
//Write NSData to file
[_outputFileHandle writeData:data];
//close the file if written complete
[_outputFileHandle closeFile];
at the end of file written you should close the file.
You can also check the content written in file as NSString for debug point of view as mention above by #Glenn Smith:
NSString *documentsDirectory = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
NSString *outputFilePath = [documentsDirectory stringByAppendingPathComponent:#"file1.txt"];
NSError *error;
NSString *str = [NSString stringWithContentsOfFile:outputFilePath encoding:NSUTF8StringEncoding error:&error];
if (error != nil) {
NSLog(#"There was an error: %#", [error description]);
} else {
NSLog(#"Text file data: %#", str);
}
i am new developer in iphone application. i would like write a content in xml file for that, i have created xml file and write tags with element, attribute and value with some data in that xml as follows.
-(void)writexmlfile:(NSString *)data toFile:(NSString *)fileName NodeName:(NSString *)Node{
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
// the path to write file
NSString *fileExtension = [NSString stringWithFormat:#"%#%#",fileName,#".xml"];
NSString *appFile = [documentsDirectory stringByAppendingPathComponent:fileExtension];
BOOL fileExists = [[NSFileManager defaultManager] fileExistsAtPath:appFile];
if(fileExists) {
NSError *error = nil;
NSString *docStr;
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
// the path to write file
NSString *appFile = [documentsDirectory stringByAppendingPathComponent:fileName];
BOOL fileExists = [[NSFileManager defaultManager] fileExistsAtPath:appFile];
if(fileExists)
{
NSLog(#"file exist in document");
NSData *myData1 = [NSData dataWithContentsOfFile:appFile];
if (myData1) {
docStr = [[NSString alloc] initWithData:myData1 encoding:NSASCIIStringEncoding];
XMLString = [[NSMutableString alloc]initWithString:docStr];
[self XMLString];
NSLog(#"data%#",XMLString);
}
}
// [XMLString insertString:data atIndex:index];
[XMLString appendFormat:#"<%#>%#</%#> \n",Node,data,Node];
BOOL success = [XMLString writeToFile:appFile atomically:YES encoding:NSUTF8StringEncoding error:&error];
if (!success) {
NSLog(#"Error: %#", [error userInfo]);
}
else {
NSLog(#"File write is successful");
}
}
}
i want add new tag with new elements,new attributes,etc.,if i enter element at the place of tag it is modifying with previous tag .
here how can i append the new tag to previous appended tags
please any body could help me
Thanks in advance
As a suggestion, you can use APXML to create XML documents it is very simple and easy to use. This post can guide you further.