title: Programmatically email an image with some subviews but not others?
body: <p>I'm working on something that will create an email and attach an image of the screen for the user to send.  I'm using the following code to create and attach the image.</p>
  
  <pre><code>    UIGraphicsBeginImageContext([self.view frame].size);
      [[self.view layer] renderInContext:UIGraphicsGetCurrentContext()];
      UIImage *myImage = UIGraphicsGetImageFromCurrentImageContext();
      UIGraphicsEndImageContext();
  
      UIGraphicsBeginImageContext([self.view bounds].size);
      [myImage drawInRect:CGRectMake(0, 0, [self.view bounds].size.width,[self.view bounds].size.height)];
      myImage = UIGraphicsGetImageFromCurrentImageContext();
      UIGraphicsEndImageContext();
      NSData *imageData = UIImagePNGRepresentation(myImage);
      [mailer addAttachmentData:imageData mimeType:@"image/jpg" fileName:@"blah"];
  </code></pre>
  
  <p>However, this includes all of the subviews, and I want to exclude a toolbar and a segmented view, leaving only the view above the toolbar and the text field in that view.  I've tagged all the relevant views and subviews, but how do I use those tags to create an image that includes what I want and excludes what I don't want?</p>