title: How to detect finger moves in or out my customized UIView
body: <p>I have a customized UIView</p>
  
  <p><code>@interface EColumn : UIView</code></p>
  
  <p>I have many instances of this EColumn in it's super view.</p>
  
  <p>How can i detect when the finger hold and moves in the area of this UIView, and when it move out.</p>
  
  <p>I don't mean a tap Gesture, i can detect tap  Gesture by using this:</p>
  
  <pre><code>UITapGestureRecognizer *tapGesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(taped:)];
          [self addGestureRecognizer:tapGesture];
  </code></pre>