title: React native TextInput Autofocus is not working
body: <p>I am having two screens in react native app say Screen A Screen B.
  A textinput is present in Screen A. I have put autofocus true for that and its working initially.</p>
  <p>When we navigate from screen A to Screen B , and then navigates back from B-&gt; A, then the textinput autofocus is not working.</p>
  <p>Do any one have any soultion for this ??</p>
  <pre><code>&lt;TextInput
    style={styles.textInput}
    textStyle={styles.inputTextStyle}
    autoFocus={true}
    placeholder='Enter Code'
    keyboard={'numeric'}
    placeholderTextColor={AppStyles.color.grey}
    value={code}
    onChangeText={this.updateCode}
    underline={false}
  /&gt;
  </code></pre>