updatefile in application folder

NSString *conent = @"One\nnghTwo\nThree\nFour\nFive";
//save content to the documents directory
[conent writeToFile:fileName 
          atomically:NO 
            encoding:NSStringEncodingConversionAllowLossy 
               error:nil];

here is the code to write data in to file

i want to update that file i have 2000 lines to write as application is used.

开发者_如何学JAVA

Thanks for help.

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You need to use the NSFileHandle class then writeData, the writing takes place at the file pointer’s current position so use seekToEndOfFile to move the pointer first.

NSFileHandle *fh = [NSFileHandle fileHandleForWritingAtPath:@"One\nnghTwo\nThree\nFour\nFive"]
[fh seekToEndOfFile];
[fh writeData:data];