Question

Is it possible to download a file from internet store it in document directory when an URL is given? I went through some documents in apple developer’s site. It said that its possible using NSURLDownload, but it cannot be used in iOS. So, it should be done by using NSURLConnection only in case of iOS. So, someone help me download a file(even the HTML page) from the given URL. Thanks in advance.

Answer 1

Here’s an example of getting an image from a server and saving it to a file.

Create your instance variables

NSMutableData *activeDownload;
NSURLConnection *imageConnection;

Now create your connection

NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
NSURL *url = [[NSURL alloc] initWithString:@"URL TO FILE"];
[request setURL:url];
[url release];
url = nil;

NSURLConnection *conn = [[NSURLConnection alloc] initWithRequest:request delegate:self];

Handle receiving data

- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data {
    [self.activeDownload appendData:data];
}

Transfer finished, save the data

- (void)connectionDidFinishLoading:(NSURLConnection *)connection {
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *fileName = [[paths objectAtIndex:0] stringByAppendingPathComponent:self.imageFileName];

[self.activeDownload writeToFile:fileName atomically:YES];

self.activeDownload = nil;
self.imageConnection = nil;
}

There are other bits of the code I’ve not shown (properties, etc), but this should give you enough to help, I think.