Objective c: download a file with progress view [closed]

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Help me! I want download a file. And how display progress bar?

I read a lot of articles and I do not work, do not work, you can explain to me how to do it?

Answer 1

You can get expected total file size in following callback method of NSURLconnection,

- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{
   expectedTotalSize = response.expectedContentLength;
}

then in the following callback method you can calculate how much data has been recieved,

- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
   recievedData += data.length;
}

And you can use UIProgressView to show current downloading status on the screen.