Question

I want to download a document which i do it by following code

NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:str] cachePolicy:NSURLRequestReloadIgnoringLocalCacheData timeoutInterval:500];

   [request setHTTPMethod:@"GET"]; 


NSData *returnData =[[NSURL alloc]init];
    returnData=[NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];

and depending on the data downloaded i want to show progress bar , is there any way how i can do that.

Thanks in advance.

Answer 1

In your delegate of NSURLConnection implement method - (void)connection:(NSURLConnection *)theConnection didReceiveResponse:(NSURLResponse *)response. In this method you can call

long long expLength = [response expectedContentLength];

In expLength you will have expected document size.

But be caution:

Some protocol implementations report the content length as part of the
response, but not all protocols guarantee to deliver that amount of
data. Clients should be prepared to deal with more or less data.