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download file with UIProgressView

/ Published in: Objective C
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  1. - (IBAction)download:(id)sender
  2. {
  3.     NSURL *url = [NSURL URLWithString:@"http://123.jpg"];
  4.     NSURLRequest *theRequest = [NSURLRequest requestWithURL:url cachePolicy:NSURLRequestReloadIgnoringLocalAndRemoteCacheData timeoutInterval:10.0];
  5.     connection = [[NSURLConnection alloc] initWithRequest:theRequest delegate:self];
  6.     connection = nil;
  7. }
  8.  
  9. - (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response {
  10.     self.filesize = [NSNumber numberWithUnsignedInteger:[response expectedContentLength]];
  11.  
  12. }
  13.  
  14. - (void)connection:(NSURLConnection *)theConnection didReceiveData:(NSData *)recievedData {
  15.     if (data==nil) {
  16. 		data =	[[NSMutableData alloc] initWithCapacity:2048];
  17.     }
  18.     [data appendData:recievedData];
  19.     NSNumber *resourceLength = [NSNumber numberWithUnsignedInteger:[data length]]; //MAGIC
  20.     float progress = [resourceLength floatValue] / [self.filesize floatValue];
  21.     progressLine.progress = progress;
  22. }
  23.  
  24.  
  25. - (void)connectionDidFinishLoading:(NSURLConnection*)theConnection {
  26.  
  27.     [connection release];
  28.     connection=nil;
  29.  
  30.     UIImageView* imageView = [[[UIImageView alloc] initWithImage:[UIImage imageWithData:data]] autorelease];
  31.     imageView.frame = self.view.bounds;	
  32.     imageView.contentMode = UIViewContentModeScaleAspectFit;
  33.     imageView.autoresizingMask = ( UIViewAutoresizingFlexibleWidth || UIViewAutoresizingFlexibleHeight );
  34.     [self.view addSubview:imageView];
  35.  
  36.     [data release];
  37.     data=nil;
  38. }

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