抽屉按钮切换不在本机基础上工作

Question

我是swift的新手，我正试图在原生基地切换抽屉。打开抽屉工作正常，但一旦点击相同的按钮，它就不会切换（不关闭）。代码如下：

import React, { Component } from 'react';
import {
 Platform,
 StyleSheet,
 Dimensions,
 Text,
 View
} from 'react-native';
import { Drawer } from 'native-base';

    export default class App extends Component {
      closeDrawer=()=> {
        this._drawer._root.close()
      };
      openDrawer=()=> {
        this._drawer._root.open()
      };

      render() {
        return (
          <Drawer
            openDrawerOffset={(Dimensions.get('window').width) / 2}
            styles={drawerStyles}
            ref={(ref) => { this._drawer = ref; }}
            content={<MenuBar navigator={this._navigator} />}
             >
            <View style={{ flex: 1 }} >
              <View>
                <Header openDrawerClicked={this.openDrawer}/>
              </View>
           </View>

         </Drawer>
    );
  }
}
const drawerStyles = {
  drawer: { paddingTop: 113, shadowColor: '#000000', shadowOpacity: 0.5, shadowRadius: 3,  paddingBottom:60},
}

输出