write data line by line on iphone

Question

i can write to a text file on iphone..but each time i write my previous value is erased, is there any way to keep writing data separated by \\n??

this is my code

Answer 1

Use NSFileHandle method seekToEndOfFile and the call to writeData

NSFileHandle *aFileHandle;
NSString *aFile;

aFile = [NSString stringWithString:@"Your File Path"]; //setting the file to write to

aFileHandle = [NSFileHandle fileHandleForWritingAtPath:aFile]; //telling aFilehandle what file write to
[aFileHandle truncateFileAtOffset:[aFileHandle seekToEndOfFile]]; //setting aFileHandle to write at the end of the file

[aFileHandle writeData:[toBeWritten dataUsingEncoding:nil]]; //actually write the data