TextInput autoFocus work-around for use in React-Native Modals

autoFocusTextInputModal.jsx

<Modal 
  visible={true}
  onShow={ () => { this.textInput.focus(); }}>
  
  {/* Adapted From: https://stackoverflow.com/questions/42730400/focus-input-on-load-of-modal-in-react-native */}

  <KeyboardAvoidingView style={{}}>

    <TextInput 
      style={{}}
      ref={ (input) => { this.textInput = input; }}
      placeholder=" Enter Text Here"
      onChangeText={ (text) => console.log(text) }
      value={ null } />

    <Button 
      title="Submit" 
      onPress={ () => console.log("do stuff...") } />

  </KeyboardAvoidingView>

</Modal>