title: How to init a custom cell when using dequeueReusableCellWithIdentifier method?
body: <p>I registered a custom cell call MyTableViewCell in tableview, and return a cell in datasource using dequeueReusableCellWithIdentifier method. </p>
  
  <p>Now, my problem are
  1: my custom cell initializer(initWithIdentifier: andModel:) can't get called.
  2: when I get a reused cell, how can I update cell content with its according model?</p>