react怎么实现密码隐藏功能

import {
  View,
  Text,
  TouchableWithoutFeedback,
  TextInput,
  Image,
  StyleSheet,
} from 'react-native';

export default class App extends Component {
  constructor(props) {
    super(props);
    this.state = {
      imageState: false,
    };
  }
  render() {
    return (
      <View style={{ flex: 1, justifyContent: 'space-around' }}>
        <View
          style={{ backgroundColor: '#ffffff', height: 50, flexDirection: 'row', justifyContent: 'space-between', marginTop: 1, }}>
          <Text style={pageStyle.textStyle}>请输入密码:</Text>
          <TextInput
            secureTextEntry={!this.state.imageState}//是否隐藏
            editable={true}//是否可编辑
            style={pageStyle.textInfoStyle}>
            test12345test
          </TextInput>
          <TouchableWithoutFeedback style={{ marginRight: 10 }} onPress={this.onPressChang}>
            {this.state.imageState ? (
              <Image style={{ width: 21, height: 14, alignSelf: 'center', marginRight: 10, }}
                source={require('../ReactDemo1/Android/app/src/main/res/mipmap-xhdpi/passWord_show.png')}
              />) : (<Image style={{ width: 20, height: 8, alignSelf: 'center', marginRight: 10, }}
                source={require('../ReactDemo1/android/app/src/main/res/mipmap-xhdpi/password_hide.png')}
              />)}
          </TouchableWithoutFeedback>
        </View>
      </View>
    );
  }
  onPressChang = () => {
    this.setState({
      imageState: !this.state.imageState,
    });
  };
}
const pageStyle = StyleSheet.create({
  textInfoStyle: {
    alignSelf: 'center',
    marginLeft: 40,
    color: '#343434',
    fontSize: 16,
    flex: 1,
  },
  textStyle: {
    alignSelf: 'center',
    marginLeft: 10,
    color: '#343434',
    fontSize: 16,
  },
});