title: React Native: mobile number validation accept numeric value only
body: <p>How validate mobile number in react native accept the only numeric value.</p>
  
  <pre><code> &lt;TextInput
        ref='mobileNo'
        keyboardType="numeric"
        style={[styles.textInput, { width: '100%' }]}
        placeholder='Enter mobile number'
        onChangeText={(value) =&gt; this.handleChange('mobileNo', value)}   /&gt;
  </code></pre>
  
  <p>I have used <code>keyboardType="numeric"</code> but its accept special character also so I want to accept the only numeric value.</p>