title: iOS event for continuous touch
body: <p>I'm writing an iOS app and I can't seem to figure out how to do a continuous touch event. I tried using the "touchesBegan" and "touchesEnd" functions but those aren't for continuous touching. </p>
  
  <p>So basically what I have right now is as follows:</p>
  
  <pre><code>-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
  {
      [super touchesBegan:touches withEvent:event];
  
      UITouch *touch = [touches anyObject];
      if([touch view] == [self viewWithTag:kTag])
      {
          CGFloat yOffset = contentView.contentOffset.y;
          yOffset ++;
          [contentView setContentOffset:CGPointMake(0, yOffset)];
      }
  }
  </code></pre>
  
  <p>However I want the content offset to continue shifting indefinitely as long as my finger is touching the given view. Right now it stops after one iteration. </p>