title: Handle object with properties on onChangeText event in react native
body: <p>I'm new in react native and don't know how to handle current case and I already spend a lot of time searching for solution. I Have  following constructor:</p>
  
  <pre class="lang-js prettyprint-override"><code>constructor (props) {
    super(props);
    this.state = {
      newNote: { title: '', description: '', dateToRead: null },
      modalVisible: false
    };
  }
  </code></pre>
  
  <p>How can I save value on <code>onChangeText</code> event in TextInput? And is it correct handling of properties in react native?</p>