using UIProgressView

Hello,

I was wondering how can I implement the UIProgressView to show my users the status of their upload.

here is my upload code:

Code:

- (void)viewDidLoad {
	self.imgPicker = [[UIImagePickerController alloc] init];
	self.imgPicker.allowsImageEditing = YES;
	self.imgPicker.delegate = self;		
}

- (IBAction)grabImage {
	[self presentModalViewController:self.imgPicker animated:YES];
}

- (IBAction)uploadImage {
	/*
	 turning the image into a NSData object
	 getting the image back out of the UIImageView
	 setting the quality to 90
	*/
	NSData *imageData = UIImageJPEGRepresentation(image.image, 90);
	// setting up the URL to post to
	NSString *urlString = @"http://mozymac.com/upload.php";
	
	// setting up the request object now
	NSMutableURLRequest *request = [[[NSMutableURLRequest alloc] init] autorelease];
	[request setURL:[NSURL URLWithString:urlString]];
	[request setHTTPMethod:@"POST"];
	
	/*
	 add some header info now
	 we always need a boundary when we post a file
	 also we need to set the content type
	 
	 You might want to generate a random boundary.. this is just the same 
	 as my output from wireshark on a valid html post
	*/
	NSString *boundary = [NSString stringWithString:@"---------------------------14737809831466499882746641449"];
	NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@",boundary];
	[request addValue:contentType forHTTPHeaderField: @"Content-Type"];
	
	/*
	 now lets create the body of the post
	*/
	NSMutableData *body = [NSMutableData data];
	[body appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];	
	[body appendData:[[NSString stringWithString:@"Content-Disposition: form-data; name=\"userfile\"; filename=\".jpg\"\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
	[body appendData:[[NSString stringWithString:@"Content-Type: application/octet-stream\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
	[body appendData:[NSData dataWithData:imageData]];
	[body appendData:[[NSString stringWithFormat:@"\r\n--%@--\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];
	// setting the body of the post to the reqeust
	[request setHTTPBody:body];
	
	// now lets make the connection to the web
	NSData *returnData = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];
	NSString *returnString = [[NSString alloc] initWithData:returnData encoding:NSUTF8StringEncoding];
	
	NSLog(returnString);
}

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingImage:(UIImage *)img editingInfo:(NSDictionary *)editInfo {
	image.image = img;	
	[[picker parentViewController] dismissModalViewControllerAnimated:YES];
	
	// need to show the upload image button now
	upload.hidden = NO;
}