title: How to open new view controller after click button?
body: <p>I added one <code>ViewController</code> to my project and created one class.
  After I bind this class to my <code>ViewController</code>.</p>
  
  <p>In another controller I have method:</p>
  
  <p><code>- (IBAction)login:(id)sender {
    // How here I can do redirect to controller</code>ViewController<code>
  }</code></p>