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My application navigation based. UItextView for notes UIViewController. I am writing data for text to file. Now i need to write in append mode , the below code i am trying but every time is writing to two time with same text data, and not appending if next text data to file.
- (void)saveText:(id)sender
{
[self.textview resignFirstResponder];
NSArray *documentPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [documentPaths objectAtIndex:0];
NSString *documentTXTPath = [documentsDirectory stringByAppendingPathComponent:@"Notes.txt"];
NSString *savedString = textview.text;
[savedString writeToFile:documentTXTPath atomically:YES];
NSFileHandle *myHandle = [NSFileHandle fileHandleForUpdatingAtPath:documentTXTPath ];
[myHandle seekToEndOfFile];
[myHandle writeData: [savedString dataUsingEncoding:NSUTF8StringEncoding]];
[myHandle closeFile];
}
491
In order to append a new line your existing file, you need to open the file in append mode , by setting "a" or "ab" as the mode. When you open with "a" mode , the write position will always be at the end of the file (an append).
To append to a text fileUse the WriteAllText method, specifying the target file and string to be appended and setting the append parameter to True . This example writes the string "This is a test string." to the file named Testfile. txt .
You can use cat with redirection to append a file to another file. You do this by using the append redirection symbol, ``>>''. To append one file to the end of another, type cat, the file you want to append, then >>, then the file you want to append to, and press <Enter>.
PHP Append to File - fwrite() The PHP fwrite() function is used to write and append data into file. fwrite($fp, ' this is additional text ');
Remove the following line of code
[savedString writeToFile:documentTXTPath atomically:YES];
And remaining code are all fine. Anyway check my code also,
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *documentTXTPath = [documentsDirectory stringByAppendingPathComponent:@"Notes.txt"];
NSString *savedString = textview.text;
NSFileHandle *myHandle = [NSFileHandle fileHandleForWritingAtPath:documentTXTPath];
[myHandle seekToEndOfFile];
[myHandle writeData:[savedString dataUsingEncoding:NSUTF8StringEncoding]];
Try this it works great
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *documentTXTPath = [documentsDirectory stringByAppendingPathComponent:@"Notes.txt"];
NSString *savedString = textview.text;
If file Does not exist create it and write to file or else its already created append to end of the file
NSFileManager *fileManager = [NSFileManager defaultManager];
if(![fileManager fileExistsAtPath:documentTXTPath])
{
[savedString writeToFile:documentTXTPath atomically:YES];
}
else
{
NSFileHandle *myHandle = [NSFileHandle fileHandleForWritingAtPath:documentTXTPath];
[myHandle seekToEndOfFile];
[myHandle writeData:[savedString dataUsingEncoding:NSUTF8StringEncoding]];
}
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