Wrapper around React Native's TextInput to make getting the text easier.

TextInput.js

import React, {
  Component,
  PropTypes,
  TextInput as NativeTextInput
} from 'react-native';

/**
 * Wrapper for the native TextInput which adds getValue()
 **/
class TextInput extends Component {
  constructor(props) {
    super(props);

    this.state = {
      text: '',
    };

    this.onChange = this._onChange.bind(this);
  }

  getValue() {
    return this.state.text;
  }

  _onChange(text) {
    this.setState({ text });

    if (this.props.onChangeText !== undefined) {
      this.props.onChangeText(text);
    }
  }

  render() {
    return (
      <NativeTextInput {...this.props} onChangeText={this.onChange} />
    );
  }
}

TextInput.propTypes = {
  onChangeText: PropTypes.func,
};

export default TextInput;