Save archive to Documents folder - ios

Question

Here is the code I have for downloading an archive and saving it to my Documents folder:
NSURLRequest *request = [[NSURLRequest alloc] initWithURL:[NSURL URLWithString:resource] cachePolicy:NSURLRequestReloadIgnoringLocalAndRemoteCacheData timeoutInterval:10];
NSData *receivedData;
NSURLResponse *requestResponse;
NSError *requestError;
int i = 3;
while (i) //Try 3 times
{
receivedData = [NSURLConnection sendSynchronousRequest:request returningResponse:&requestResponse error:&requestError];
if (receivedData)
{
i = 0;
}
else i--;
}
if (!receivedData)
{
NSLog(#"************************************************");
NSLog(#"** Error downloading data for resource : %# **", resource);
NSLog(#"************************************************");
}
else
{
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0]; //Get documents folder
NSString *dataPath;
dataPath = [documentsDirectory stringByAppendingPathComponent:LIST_FOLDER];
NSError *documentError;
if (![[NSFileManager defaultManager] fileExistsAtPath:dataPath]) //Create folder
{
[[NSFileManager defaultManager] createDirectoryAtPath:dataPath withIntermediateDirectories:YES attributes:nil error:&documentError];
}
NSLog(#"saveError = %#", documentError); //Prints out null so no problem here
NSError *writeError;
[receivedData writeToFile:dataPath options:NSDataWritingAtomic error:&writeError];
NSLog(#"write error = %#", writeError);
The last nslog prints out the following and won't save the archive:
Error Domain=NSCocoaErrorDomain Code=512 "The operation couldn’t be completed. (Cocoa error 512.)" "The operation couldn’t be completed. Is a directory"}
The subfolder in the Documents directory gets created but it is empty.
Thanks

Answer 1

You are trying to write the data to the folder. You need to write it to a file in the folder.
dataPath is the directory you create. You need to append a filename to that path and then write the file to that full path (with filename).