title: How to use UIStepper
body: <p>I am trying to work with <code>UIStepper</code> to increment or decrement an integer,
  but both "-"  and "+" increase the integer!  How can I recognize the "+" and "-" button?</p>
  
  <p>In the <code>UIStepper</code> header file there are two <code>UIButton</code>s:</p>
  
  <pre><code>UIButton *_plusButton;
  UIButton *_minusButton;
  </code></pre>
  
  <p>for example :</p>
  
  <pre><code>- (IBAction)changeValue:(id)sender 
  {        
      UIStepper *stepper = (UIStepper *) sender;
  
      stepper.maximumValue = 10;
      stepper.minimumValue = 0;      
      if (stepper)
      {
          integer++;
          [label setText:[NSString stringWithFormat:@"%d",integer]];
       }
       else
       { 
           integer--;
           [label setText:[NSString stringWithFormat:@"%d",integer]];
       }
  
  }
  </code></pre>