title: UILabel updating stops during scrolling UIScrollView
body: <p>I have a scrollView with an imageView inside of it. The <code>scrollView</code> is a subView of the superView, and the imageView is a subView of the <code>scrollView</code>.
  I also have a label (at the super-view level) that receives updated values on its text property from a NSTimer every millisecond.</p>
  
  <p>The problem is: 
  During scrolling, the label stops to display the updates. When the scrolling is end, updates on the label restart. When updates restart they are correct; this means that label.text values are updated as expected, but while scrolling, updates display is overriden somewhere.
  <strong>I would like to display updates on the label regardless of scrolling or not.</strong></p>
  
  <p>Here is how the label updates are implemented:</p>
  
  <pre><code>- (void)startElapsedTimeTimer {
  
       [self setStartTime:CFAbsoluteTimeGetCurrent()];
       NSTimer *elapsedTimeTimer = [NSTimer scheduledTimerWithTimeInterval:0.001 target:self selector:@selector(updateElapsedTimeLabel) repeats:YES];
  }
  
  - (void)updateElapsedTimeLabel {
  
      CFTimeInterval currentTime = CFAbsoluteTimeGetCurrent();
      float theTime = currentTime - startTime;
  
      elapsedTimeLabel.text = [NSString stringWithFormat:@"%1.2f sec.", theTime];
  }
  </code></pre>
  
  <p>Thanks for any help.</p>