title: Access QSettings in my app
body: <p>I'm trying to implement application settings for my Qt app.
  I'm working with <code>QSettings</code>, created an instance of my class like this</p>
  
  <pre><code>settings = new QSettings(qApp-&gt;organizationName(), qApp-&gt;applicationName());
  </code></pre>
  
  <p>and was wondering : <strong>what is the best way to access my settings through my app</strong>?</p>
  
  <p>I will need access to some settings from different classes, but I don't know if I have to declare and create only one instance of QSettings and make it accessible everywhere I need it or if I can create local instances of <code>QSettings</code> where I need to access some of the settings.</p>