title: set a component of UIPickerView as a separator
body: <p>I created a decimal number <code>UIPickerView</code>. I want the second component which is just a constant dot string (.) became as a separator, I mean :</p>
  
  <p>1) It doesn't move</p>
  
  <p>2) Its width is smaller than other components</p>
  
  <p>3) Its color is different in comparison with other components</p>
  
  <p><a href="https://i.stack.imgur.com/H1snJm.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/H1snJm.png" alt="enter image description here"></a></p>
  
  <p><strong>Here is the code:</strong></p>
  
  <pre><code>#pragma mark - UIPickerView : Datasource Protocol
  -(NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView {
      return 3;
  }
  
  -(NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component {    if(component == 2)
          return 10;
      if(component == 1)
          return 1;
      else
          return 1000;
  }
  
  -(NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component {
      if(component == 1)
          return @".";
      else
          return [NSString stringWithFormat:@"%ld", (long)row];
  
  }
  </code></pre>
  
  <p>How can I do this?</p>