问React原生InputAccessoryView在iOS 11上不起作用

EN

    /**
 * Copyright (c) Facebook, Inc. and its affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * @flow
 * @format
 */

'use strict';

const React = require('React');
const ReactNative = require('react-native');
const {
Alert,
Button,
InputAccessoryView,
ScrollView,
StyleSheet,
Text,
TextInput,
View,
} = ReactNative;

class Message extends React.PureComponent<*> {
render() {
    return (
    <View style={styles.textBubbleBackground}>
        <Text style={styles.text}>Text Message</Text>
    </View>
    );
}
}

class TextInputBar extends React.PureComponent<*, *> {
state = {text: ''};

render() {
    return (
    <View style={styles.textInputContainer}>
        <TextInput
        style={styles.textInput}
        onChangeText={text => {
            this.setState({text});
        }}
        value={this.state.text}
        placeholder={'Type a message...'}
        />
        <Button
        onPress={() => {
            Alert.alert('You tapped the button!');
        }}
        title="Send"
        />
    </View>
    );
}
}

class InputAccessoryViewExample extends React.Component<*> {
static title = '<InputAccessoryView>';
static description =
    'Example showing how to use an InputAccessoryView to build an iMessage-like sticky text input';

render() {
    return (
    <View>
        <ScrollView keyboardDismissMode="interactive">
        {Array(15)
            .fill()
            .map((_, i) => <Message key={i} />)}
        </ScrollView>
        <InputAccessoryView backgroundColor="#fffffff7">
        <TextInputBar />
        </InputAccessoryView>
    </View>
    );
}
}

const styles = StyleSheet.create({
textInputContainer: {
    flexDirection: 'row',
},
textInput: {
    flex: 1,
    paddingLeft: 10,
},
text: {
    padding: 10,
    color: 'white',
},
textBubbleBackground: {
    backgroundColor: '#2f7bf6',
    borderRadius: 20,
    width: 110,
    margin: 20,
},
});

module.exports = InputAccessoryViewExample;