当我导航到此页面时，总是出现错误“超级表达式必须为null或函数，而不是未定义的”

Question

'use strict';
import React, {Component} from 'react';
import { Tab, TabLayout } from 'react-native-android-tablayout';

import{
  ViewPagerAndroid,
  View,
  StyleSheet,
  ScrollView,
  Text,
} from 'react-native';

import EventList from './javra-event-list';

var eventLayout = (
  <ScrollView>
    <EventList 
      title='Latest Event' 
      event='latest' 
      itemsPerRow={this.props.movies.length} 
      items={this.props.movies} direction={true}/>
    <EventList 
      title='Event Type' 
      event='event' 
      itemsPerRow={this.props.movies.length} 
      items={this.props.movies} direction={true}/>
    <EventList 
      title='Popular Event' 
      event='popular' 
      itemsPerRow={this.props.movies.length} 
      items={this.props.movies} direction={true}/>
  </ScrollView>
);

var tabView = eventLayout;

export default class TabsUi extends Component {
  constructor(props) {
    super(props);
    this.state = {
      pagePosition: 0,
    }
  }

  render(){
    return(
      <View style={{marginTop:0, flex:1}}>
        <TabLayout  
          style ={{height:40, backgroundColor: 'skyblue'}} 
          selectedTab = {this.state.pagePosition}
          onTabSelected = {this.setPagePosition.bind(this)}>
          <Tab name="Events" style={styles.tab1}/>
          <Tab name="User Uploads" style={styles.tab1}/>
        </TabLayout>
        {tabView}
      </View>
    );
  }

  setPagePosition(e:Event){
    const pagePosition = e.nativeEvent.position;
    console.log(pagePosition);
    this.setState({pagePosition});
    switch (pagePosition) {
      case 0:
        tabView = (
          <ScrollView>
            <EventList 
              title='Latest Event' 
              event='latest' 
              itemsPerRow={this.props.movies.length} 
              items={this.props.movies} direction={true}/>
            <EventList 
              title='Event Type' 
              event='event' 
              itemsPerRow={this.props.movies.length} 
              items={this.props.movies} 
              direction={true}/>
            <EventList 
              title='Popular Event' 
              event='popular' 
              itemsPerRow={this.props.movies.length} 
              items={this.props.movies} 
              direction={true}/>
          </ScrollView>
        );
        break;
      case 1: 
        tabView = (
          <View>
            <Text>
              Tab content 2
            </Text>
         </View>
        );
        break;
      default:
    }
    this.forceUpdate();
  }
}

当我导航到此页面时，总是出现上述错误。我使用了最新的ECMA脚本语法和最新的react原生版本0.27。我的代码有什么问题？

如有任何建议，将不胜感激。

Answer 1

现在，react-nate-android-tablayout更新为大于0.28v的react-nate-android-tablayout的最新版本。感谢这个图书馆的作者。https://github.com/AlbertBrand/react-native-android-tablayout/issues/22

现在，android支持tablayout。

Answer 2

我也有同样的问题，我刚刚更新了节点_模块上的两个文件Tab.js和TabLayout.jshttps://github.com/AlbertBrand/react-native-android-tablayout 这对我来说很有效，主要的变化是调用导入模块。

import {
  React,
  Component,
  PropTypes,
  processColor,
  requireNativeComponent,
  View,
} from 'react-native';

取而代之

import React, {
  Component,
  PropTypes
} from 'react';
import {
  processColor,
  requireNativeComponent,
  View,
} from 'react-native';

但最好替换整个文件