Question

I need to write several line to a file. How can I move to the next line so that the file content is not overwritten each time? I am using a for loop with the following code in it

[anNSString writeToFile:path atomically:YES encoding:NSUTF8StringEncoding error:NULL];

The NSString. anNSString is reinitialized during each loop. SO i need to keep adding to the file path each during each loop.
Thanks

Answer 1

You just write it out all at once, rather than attempting to write it incrementally. -[NSString writeToFile:atomically:encoding:error] will just overwrite the file each time – it does not append.

Here’s an illustration:

NSMutableString * str = [NSMutableString new];

// > anNSString is reinitialized during each loop. 
for ( expr ) {
    NSString * anNSString = ...;
    // > SO i need to keep adding to the file path each during each loop.
    [str appendString:anNSString];
}

NSError * outError(0);
BOOL success = [str writeToFile:path
                     atomically:YES
                       encoding:NSUTF8StringEncoding
                          error:&outError];
[str release];
...