title: I don't understand constraints priority
body: <p><a href="https://i.stack.imgur.com/fEbul.png" rel="noreferrer"><img src="https://i.stack.imgur.com/fEbul.png" alt="enter image description here"></a></p>
  
  <p>I create a rect with following constraints:</p>
  
  <p><a href="https://i.stack.imgur.com/AyilZ.png" rel="noreferrer"><img src="https://i.stack.imgur.com/AyilZ.png" alt="enter image description here"></a></p>
  
  <p>I though if i set priority to constraints with <code>width &gt;=250</code> to <code>999</code>, then width <code>equal == 200</code> will work on small devices, and with <code>width &gt;= 250</code> on large.</p>
  
  <p>But it is not worked. I read documentation:</p>
  
  <blockquote>
    <p>After solving for the required constraints, Auto Layout tries to
    solve all the optional constraints in priority order from highest to
    lowest. If it cannot solve for an optional constraint, it tries to
    come as close as possible to the desired result, and then moves on to
    the next constraint.</p>
    
    <p>This combination of inequalities, equalities, and priorities gives you
    a great amount of flexibility and power. By combining multiple
    constraints, you can define layouts that dynamically adapt as the size
    and location of the elements in your user interface change.</p>
  </blockquote>