File upload process for CAMM resizing image, utilizing parse, and communicating to web view.

CAMMFileUpload.m

- (void)imagePickerController:(UIImagePickerController *)picker 
didFinishPickingMediaWithInfo:(NSDictionary *)info {
    // Hide the image picker.
    [picker dismissModalViewControllerAnimated:YES];
    
    // Reference the image from the picker.
    UIImage *image = [info objectForKey:UIImagePickerControllerOriginalImage];
    
    // Use the size of the image to calculate its aspect ratio.
    float aspectRatio = image.size.width/image.size.height;
    
    // Resample the image so that it is 800x? for web purposes.
    UIImage *scaledImage = [image scaleToSize:CGSizeMake(600.0f*aspectRatio, 600.0f)];
    
    // Free the reference to the original image.
    image = nil;
    
    // We'll transmit a JPEG representation compressed at 20% quality.
    NSData *imageData = UIImageJPEGRepresentation(scaledImage, 0.2);
    
    // We'll use the current timestamp for the filename:
    NSTimeInterval timeStamp = [[NSDate date] timeIntervalSince1970];

    // NSTimeInterval is defined as double
    NSNumber *timeStampObj = [NSNumber numberWithDouble: timeStamp];
    
    NSString *fileName = [NSString stringWithFormat:@"%@.jpg", [timeStampObj stringValue], nil];
    
    // Transmit the file to parse.
    PFFile *imageFile = [PFFile fileWithName:fileName data:imageData];
    [imageFile saveInBackgroundWithBlock:^(BOOL succeeded, NSError *error) {
        NSString *javascript = [NSString stringWithFormat:@"setReportType(\"%@\"); readyDocument(); setImagePath(\"%@\");", reportType, imageFile.url, nil];
        [reportWebView stringByEvaluatingJavaScriptFromString:javascript];
        javascript = nil;
    } progressBlock:^(int percentDone) {
        NSLog(@"Percent: %i",percentDone);
    }];
}