title: Swift UITextField resize
body: <p>I want to make one app for iPhone 5,6,6+. So, every element it must be to resize it. I can't resize <code>UITextField</code>. </p>
  
  <p>The only way I found is calling <code>self.view.addSubview()</code>. It works if I want to make the <code>UITextField</code> larger, but not smaller. How can I change current <code>UITextField</code>?</p>
  
  <p>Can you suggest something?</p>